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Storm ActivityMontana Storm ActivitySweet Grass County, MT
Montana · Official NOAA Storm Data

Sweet Grass County Hail Map & Storm Reports

Hail, wind, and tornado reports from official NOAA sources (NWS & SPC) · Last 12 months · Updated Sep 12, 2026

Looking for storm and wind reports in Sweet Grass County, Montana? Official National Weather Service (NWS) and Storm Prediction Center (SPC) records show 140 severe weather events in the last 12 months — 112 high-wind reports with gusts up to 85 mph, plus 28 hail reports with hail up to 0.75". The most recent recorded storm activity was in September 2026. This page updates daily: every event comes straight from official NOAA data — no estimates, no modeling, just the record.

Map of Sweet Grass County, Montana showing the county boundary and surrounding cities
Sweet Grass County, Montana. Map © Mapbox © OpenStreetMap · County boundary: US Census Bureau.

Sweet Grass County hail map

Where hail and high-wind reports clustered across Sweet Grass County over the last 12 months. Heat shows report density and significance, not radar.

140
Events (12 mo)
28
Hail
112
Wind
0
Tornado
0.75"
Max hail
85
Max wind (mph)
September 2026
Most recent

What the radar showed

Radar snapshot during the May 12, 2026 wind event near 6 S Big Timber, Sweet Grass County, Montana, with NWS warning polygons
NEXRAD radar at the moment of the May 12, 2026 wind event (69 mph) near 6 S Big Timber. Outlined polygons are the storm-based warnings exactly as issued by the National Weather Service. Imagery courtesy of the Iowa Environmental Mesonet, Iowa State University; radar data via NOAA/NWS.

Last 30 days in Sweet Grass County

Current NEXRAD radar over Sweet Grass County, Montana with recent storm report locations
Current radar over the Sweet Grass County area, with storm reports from the past 7 days plotted. Refreshes throughout the day. Imagery courtesy of the Iowa Environmental Mesonet, Iowa State University; radar data via NOAA/NWS.
September 2026 1 storm day · 1 NWS warning — hail to 0.25" Exact dates & locations in app →
August 2026 5 storm days · 10 NWS warnings — hail to 0.75", wind to 55 mph Exact dates & locations in app →

Recent storms — full detail available in the app

Storm activity from the last 30 days is summarized at the county level on this page. Exact locations, radar snapshots, and official warning boundaries for recent events are available with a free account.

See the specifics — free →

Storm log — the official record, day by day

Events older than 30 days, as recorded by the National Weather Service and Storm Prediction Center. Excerpts are quoted directly from official warnings and verified reports.

Wednesday, August 12, 2026

6 NWS warnings — hail up to 0.75"

NEXRAD radar during the Wednesday, August 12, 2026 storm activity in Sweet Grass County, Montana
Radar during the most significant activity of the day. Imagery courtesy of the Iowa Environmental Mesonet, Iowa State University; radar data via NOAA/NWS.

“At 520 PM MDT, Doppler radar was tracking a strong thunderstorm 21 miles northeast of Big Timber, moving southeast at 20 mph. Hazard: Wind gusts up to 40 mph and penny size hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include...”

NWS severe weather mention · Sweet Grass County

“At 559 PM MDT, Doppler radar was tracking a strong thunderstorm 25 miles south of Deadmans Basin Reservoir, or 21 miles northeast of Big Timber, moving east at 15 mph. Hazard: Wind gusts up to 40 mph and half inch size hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Rapelje.”

NWS severe weather mention · Sweet Grass County

Friday, July 31, 2026

1 NWS warning — wind gusts up to 50 mph

“At midnight MDT, Doppler radar was tracking a line of strong thunderstorms extending from 9 miles north of Harlowton to 8 miles east of Big Timber, moving east at 40 mph. Hazard: Wind gusts up to 50 mph. over northern Sweet Grass county. Impact: Gusty winds could knock down small tree limbs and blow around unsecured objects. The strong wind gusts will be near... Harlowton around 1200 AM MDT.”

NWS severe weather mention · Sweet Grass County

Tuesday, July 28, 2026

1 NWS warning — hail up to 0.25"

“At 802 PM MDT, Doppler radar was tracking a line of thunderstorms extending from near Livingston to 24 miles south of Big Timber, moving northeast at 20 mph. Hazard: Wind gusts of 50 to 55 mph and pea size hail, along with brief moderate to heavy rain. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible.”

NWS severe weather mention · Sweet Grass County

Monday, July 27, 2026

2 SPC verified storm reports · 1 NWS warning — wind gusts up to 58 mph

NEXRAD radar during the Monday, July 27, 2026 storm activity in Sweet Grass County, Montana
Radar during the most significant activity of the day. Imagery courtesy of the Iowa Environmental Mesonet, Iowa State University; radar data via NOAA/NWS.

“At 822 PM MDT, Doppler radar was tracking a thunderstorm near Livingston, moving east at 25 mph. Hazard: Wind gusts up to 50 mph. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Livingston, Clyde Park, Pine Creek, Springdale and Mc Leod.”

NWS severe weather mention · Sweet Grass County

Sunday, July 26, 2026

3 NWS warnings — hail up to 0.25", wind gusts up to 50 mph

“At 326 PM MDT, Doppler radar was tracking a shower with strong winds 19 miles west of Livingston, moving east at 45 mph. Hazard: Wind gusts up to 50 mph. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Livingston, Pine Creek, Springdale and Mc Leod.”

NWS severe weather mention · Sweet Grass County

“At 731 PM MDT, Doppler radar was tracking a strong thunderstorm 7 miles west of Absarokee, or 18 miles southwest of Columbus, moving east at 30 mph. Hazard: Wind gusts of 40 to 50 mph and pea size hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include...”

NWS severe weather mention · Sweet Grass County

Saturday, July 25, 2026

5 NWS warnings — hail up to 0.75", wind gusts up to 50 mph

NEXRAD radar during the Saturday, July 25, 2026 storm activity in Sweet Grass County, Montana
Radar during the most significant activity of the day. Imagery courtesy of the Iowa Environmental Mesonet, Iowa State University; radar data via NOAA/NWS.

“At 514 PM MDT, Doppler radar was tracking an area of strong thunderstorms 17 miles west of Livingston, moving northeast at 25 mph. Hazard: Wind gusts up to 50 mph. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Strong crosswinds could impact Interstate 90 through Livingston. Locations impacted include... Livingston, Clyde Park, Wilsall, Springdale and Mc Leod.”

NWS severe weather mention · Sweet Grass County

“At 807 PM MDT, Doppler radar was tracking a strong thunderstorm near Livingston, moving east at 35 mph. Hazard: Wind gusts up to 50 mph and penny size hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Livingston, Springdale and Mc Leod.”

NWS severe weather mention · Sweet Grass County

Friday, July 24, 2026

1 SPC verified storm report · 4 NWS warnings — hail up to 0.25", wind gusts up to 62 mph

NEXRAD radar during the Friday, July 24, 2026 storm activity in Sweet Grass County, Montana
Radar during the most significant activity of the day. Imagery courtesy of the Iowa Environmental Mesonet, Iowa State University; radar data via NOAA/NWS.

“At 243 AM MDT, Doppler radar was tracking a line of strong thunderstorms extending from 26 miles north of Ryegate to 19 miles northwest of Columbus, moving east at 35 mph. Hazard: Wind gusts of 40 to 50 mph. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include...”

NWS severe weather mention · Sweet Grass County

“At 158 AM MDT, Doppler radar was tracking a line of strong thunderstorms extending from 18 miles northwest of Harlowton to 14 miles east of Livingston, moving east at 35 mph. Hazard: Wind gusts of 40 to 50 mph. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include...”

NWS severe weather mention · Sweet Grass County

Wednesday, July 22, 2026

1 NWS warning — wind gusts up to 55 mph

“At 529 PM MDT, Doppler radar was tracking an area of strong thunderstorms 16 miles southwest of Big Timber, or 16 miles east of Livingston, moving northeast at 25 mph. Hazard: Wind gusts of 50 to 55 mph. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Livingston and Springdale.”

NWS severe weather mention · Sweet Grass County

Saturday, July 18, 2026

1 NWS warning — wind gusts up to 60 mph

“At 808 PM MDT, Doppler radar was tracking a shower near Livingston, moving east at 35 mph. Hazard: Wind gusts of 50 to 60 mph. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Livingston, Big Timber, Springdale, Mc Leod and Greycliff.”

NWS severe weather mention · Sweet Grass County

Friday, July 17, 2026

1 NWS warning — hail up to 0.75"

“At 450 PM MDT, Doppler radar was tracking a strong thunderstorm approaching Melville, moving east at 15 mph. Hazard: Wind gusts up to 40 mph and penny size hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Torrential rainfall may bring rises on Sweet Grass Creek. Locations impacted include... Melville.”

NWS severe weather mention · Sweet Grass County

Thursday, July 16, 2026

1 NWS warning — hail up to 0.75"

“At 743 PM MDT, Doppler radar was tracking an area of strong thunderstorms 19 miles southwest of Deadmans Basin Reservoir, or 24 miles southeast of Harlowton, moving northeast at 15 mph. Hazard: Wind gusts of 50 to 55 mph and penny size hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include...”

NWS severe weather mention · Sweet Grass County

Sunday, July 12, 2026

1 SPC verified storm report — wind gusts up to 61 mph

“Mesonet station MTHLS Harlowton South Us-191 Mp 22.0. (BYZ)”

SPC verified report · 3 NE Melville

Wednesday, July 8, 2026

2 NWS warnings — hail up to 0.25", wind gusts up to 50 mph

“At 744 PM MDT, Doppler radar was tracking a line of strong thunderstorms extending from 25 miles north of Absarokee to 7 miles west of Absarokee, or extending from 19 miles east of Big Timber to 17 miles west of Columbus, moving east at 40 mph. Hazard: Wind gusts up to 50 mph. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include...”

NWS severe weather mention · Sweet Grass County

“At 700 PM MDT, Doppler radar was tracking a strong thunderstorm near Livingston, moving east at 20 mph. Hazard: Wind gusts of 50 to 55 mph and pea size hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Livingston and Springdale.”

NWS severe weather mention · Sweet Grass County

Tuesday, July 7, 2026

1 SPC verified storm report — wind gusts up to 59 mph

“Mesonet station GW0007 Big Timber. (BYZ)”

SPC verified report · Big Timber

Sunday, July 5, 2026

1 SPC verified storm report · 1 NWS warning — hail up to 0.25", wind gusts up to 58 mph

“At 318 PM MDT, Doppler radar was tracking a strong thunderstorm 11 miles southeast of Big Timber, moving northeast at 40 mph. Hazard: Wind gusts up to 50 mph and pea size hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Big Timber, Reed Point and Greycliff.”

NWS severe weather mention · Sweet Grass County

Thursday, July 2, 2026

1 NWS warning — hail up to 0.5"

“At 403 PM MDT, Doppler radar was tracking a strong thunderstorm 19 miles south of Big Timber, moving east at 20 mph. Hazard: Wind gusts up to 40 mph and half inch size hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include...”

NWS severe weather mention · Sweet Grass County

Wednesday, July 1, 2026

1 SPC verified storm report · 2 NWS warnings — hail up to 0.5", wind gusts up to 58 mph

NEXRAD radar during the Wednesday, July 1, 2026 storm activity in Sweet Grass County, Montana
Radar during the most significant activity of the day. Imagery courtesy of the Iowa Environmental Mesonet, Iowa State University; radar data via NOAA/NWS.

“Mesonet station MTHLS Harlowton South Us-191 Mp 22.0. (BYZ)”

SPC verified report · 3 NE Melville

“At 554 PM MDT, Doppler radar was tracking a strong thunderstorm 15 miles south of Harlowton, moving northeast at 30 mph. Hazard: Wind gusts of 50 to 55 mph and half inch size hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Deadmans Basin Reservoir and Shawmut.”

NWS severe weather mention · Sweet Grass County

Friday, June 12, 2026

1 NWS warning — wind gusts up to 50 mph

“At 720 PM MDT, Doppler radar was tracking a thunderstorm outflow. Hazard: Wind gusts up to 50 mph. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Big Timber, Melville and Greycliff.”

NWS severe weather mention · Sweet Grass County

Wednesday, June 10, 2026

1 NWS warning — wind gusts up to 55 mph

“West to northwest winds gusting 40 to 55 mph have been observed over foothills of south-central Montana as well as locations near Billings. Those outdoors or driving this evening should be prepared for these sudden strong wind gusts.”

NWS severe weather mention · Sweet Grass County

Sunday, June 7, 2026

2 NWS warnings — hail up to 0.25", wind gusts up to 55 mph

“West to northwest winds gusting 40 to 55 mph have been reported over the western foothills. These strong winds, not associated with thunderstorms, will spread eastward over the next few hours. They may reach as far east as Musselshell and Yellowstone county before diminishing late this evening. Those outdoors and those driving this evening should be prepared for these sudden strong wind gusts.”

NWS severe weather mention · Sweet Grass County

“At 208 PM MDT, Doppler radar was tracking a strong thunderstorm 27 miles south of Deadmans Basin Reservoir, or 24 miles east of Big Timber, moving northeast at 25 mph. Hazard: Wind gusts up to 50 mph and pea size hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include...”

NWS severe weather mention · Sweet Grass County

Saturday, June 6, 2026

2 NWS warnings — wind gusts up to 55 mph

NEXRAD radar during the Saturday, June 6, 2026 storm activity in Sweet Grass County, Montana
Radar during the most significant activity of the day. Imagery courtesy of the Iowa Environmental Mesonet, Iowa State University; radar data via NOAA/NWS.

“At 647 PM MDT, Doppler radar was tracking a line of showers extending from 15 miles northeast of Harlowton to 19 miles southwest of Big Timber, moving east at 50 mph. Hazard: Wind gusts of 50 to 55 mph. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include...”

NWS severe weather mention · Sweet Grass County

“At 610 PM MDT, Doppler radar was tracking gusty winds associated with showers, moving northeast at 40 mph. Hazard: Wind gusts of 40 to 50 mph. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Livingston and Springdale.”

NWS severe weather mention · Sweet Grass County

Monday, May 25, 2026

1 NWS warning — hail up to 0.75"

“At 527 PM MDT, Doppler radar was tracking a strong thunderstorm 12 miles south of Big Timber, moving north at 20 mph. Hazard: Wind gusts up to 50 mph and penny size hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Big Timber and Greycliff.”

NWS severe weather mention · Sweet Grass County

Thursday, May 14, 2026

2 NWS warnings — wind gusts up to 70 mph

“WHAT...West winds gusting 60 to 70 mph expected. Strongest winds through early afternoon. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...Until 9 PM MDT this evening. IMPACTS...Strong winds may blow down some trees and power lines. Local power outages are possible.”

NWS severe weather mention · Sweet Grass County

“WHAT...West winds gusting 55 to 65 mph. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...Until 9 PM MDT this evening. IMPACTS...Strong crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap. Warm and dry conditions with strong winds could cause rapid fire spread.”

NWS severe weather mention · Sweet Grass County

Wednesday, May 13, 2026

3 SPC verified storm reports · 5 NWS warnings — wind gusts up to 70 mph

NEXRAD radar during the Wednesday, May 13, 2026 storm activity in Sweet Grass County, Montana
Radar during the most significant activity of the day. Imagery courtesy of the Iowa Environmental Mesonet, Iowa State University; radar data via NOAA/NWS.

“WHAT...West winds gusting 60 to 70 mph expected. Strongest winds tonight through Thursday morning. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...Until 9 PM MDT Thursday. IMPACTS...Strong winds may blow down some trees and power lines. Local power outages are possible.”

NWS severe weather mention · Sweet Grass County

“WHAT...West winds gusting 60 to 70 mph expected. Strongest winds tonight through Thursday morning. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...Until 9 PM MDT Thursday. IMPACTS...Strong winds may blow down some trees and power lines. Local power outages are possible.”

NWS severe weather mention · Sweet Grass County

Tuesday, May 12, 2026

1 SPC verified storm report · 1 NWS warning — wind gusts up to 70 mph

NEXRAD radar during the Tuesday, May 12, 2026 storm activity in Sweet Grass County, Montana
Radar during the most significant activity of the day. Imagery courtesy of the Iowa Environmental Mesonet, Iowa State University; radar data via NOAA/NWS.

“WHAT...West winds gusting 60 to 70 mph possible. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...From Wednesday evening through Thursday evening. IMPACTS...Travel could be difficult, especially for high profile vehicles. This includes travel on US-191 from Big Timber to Harlowton and Judith Gap. A few downed trees and power lines are possible.”

NWS severe weather mention · Sweet Grass County

Wednesday, May 6, 2026

1 NWS warning — wind gusts up to 50 mph

“At 1153 PM MDT, Doppler radar was tracking an area of showers near Big Timber, moving southeast at 30 mph. Hazard: Localized wind gusts of 40 to 50 mph. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Expect sudden cross winds on I-90 west of Columbus. Locations impacted include... Big Timber, Greycliff, Reed Point and Mc Leod.”

NWS severe weather mention · Sweet Grass County

Friday, April 17, 2026

1 NWS warning — wind gusts up to 50 mph

“At 423 PM MDT, Doppler radar was tracking an area of scattered snow showers moving southeast at 25 mph. Locations impacted include... Billings, Sheridan, Livingston, Hardin, Colstrip, Red Lodge, Columbus, Roundup, Big Timber, Harlowton, Hysham, Custer, Laurel, Ranchester, Dayton, Bridger, Joliet, Fromberg, Lodge Grass and Ryegate.”

NWS severe weather mention · Sweet Grass County

Tuesday, April 7, 2026

1 NWS warning — wind gusts up to 60 mph

“WHAT...West winds 35 to 45 mph with gusts up to 60 mph expected. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...Until midnight MDT tonight. IMPACTS...Strong crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap. Warm and dry conditions could cause rapid grass fire spread. Use caution with any burning activities.”

NWS severe weather mention · Sweet Grass County

Monday, April 6, 2026

2 NWS warnings — wind gusts up to 60 mph

“WHAT...West winds 35 to 45 mph with gusts up to 60 mph expected. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...From 9 AM Tuesday to midnight MDT Tuesday Night. IMPACTS...Strong crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap. Warm and dry conditions could cause rapid grass fire spread.”

NWS severe weather mention · Sweet Grass County

“WHAT...West winds 35 to 45 mph with gusts up to 60 mph expected. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...From 9 AM Tuesday to midnight MDT Tuesday Night. IMPACTS...Strong crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap. Warm and dry conditions could cause rapid grass fire spread.”

NWS severe weather mention · Sweet Grass County

Sunday, April 5, 2026

2 NWS warnings — wind gusts up to 60 mph

“WHAT...West winds 30 to 40 mph with gusts up to 60 mph possible. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...From Tuesday morning through Tuesday evening. IMPACTS...Strong crosswinds could make travel could be difficult along US-191 from Big Timber through Harlowton, especially for high profile vehicles.”

NWS severe weather mention · Sweet Grass County

“WHAT...West winds 30 to 40 mph with gusts up to 60 mph possible. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...From Tuesday morning through Tuesday evening. IMPACTS...Damaging winds could blow down trees and power lines. Travel could be difficult, especially for high profile vehicles.”

NWS severe weather mention · Sweet Grass County

Thursday, April 2, 2026

1 NWS warning — hail up to 0.5"

“At 138 PM MDT, Doppler radar was tracking a shower 17 miles north of Big Timber, moving northeast at 10 mph. Hazard: Wind gusts up to 40 mph and half inch size hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Melville.”

NWS severe weather mention · Sweet Grass County

Wednesday, March 18, 2026

1 NWS warning — wind gusts up to 65 mph

“WHAT...West winds gusting 50 to 65 mph. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...Until 9 PM MDT this evening. IMPACTS...Strong crosswinds will make travel difficult, especially along Highway 191 from Big Timber through Judith Gap.”

NWS severe weather mention · Sweet Grass County

Tuesday, March 17, 2026

3 NWS warnings — wind gusts up to 70 mph

“WHAT...West winds gusting 60 to 70 mph. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...Until 9 PM MDT Wednesday. IMPACTS...Strong crosswinds will make travel difficult, especially along Highway 191 from Big Timber through Judith Gap. ADDITIONAL DETAILS...Winds will decrease tonight before increasing tomorrow morning and afternoon.”

NWS severe weather mention · Sweet Grass County

“WHAT...West winds gusting 60 to 70 mph. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...Until 9 PM MDT this evening. IMPACTS...Strong crosswinds will make travel difficult, especially along Highway 191 from Big Timber through Judith Gap. ADDITIONAL DETAILS...The strongest wind gusts are expected to occur this morning.”

NWS severe weather mention · Sweet Grass County

Monday, March 16, 2026

1 NWS warning — wind gusts up to 70 mph

“WHAT...West winds gusting 60 to 70 mph. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...Until 9 PM MDT Tuesday. IMPACTS...Strong crosswinds will make travel difficult, especially along Highway 191 from Big Timber through Judith Gap. ADDITIONAL DETAILS...The strongest wind gusts are expected to occur Tuesday morning.”

NWS severe weather mention · Sweet Grass County

Thursday, March 12, 2026

4 NWS warnings — wind gusts up to 85 mph

“WHAT...West wind gusts of 60 to 85 mph expected. Locally higher gusts are possible. WHERE...Portions of central and south central Montana. WHEN...Until 9 PM MDT this evening. IMPACTS...Strong to dangerous crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap, and Highway 12 from Harlowton to Lavina. Damaging winds could blow down trees and power lines.”

NWS severe weather mention · Sweet Grass County

“WHAT...West wind gusts of 60 to 85 mph expected. Locally higher gusts are possible. WHERE...Portions of central and south central Montana. WHEN...Until 9 PM MDT Thursday. IMPACTS...Strong to dangerous crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap, and Highway 12 from Harlowton to Lavina. Damaging winds could blow down trees and power lines.”

NWS severe weather mention · Sweet Grass County

Wednesday, March 11, 2026

3 NWS warnings — wind gusts up to 85 mph

“WHAT...West wind gusts of 60 to 85 mph expected. Locally higher gusts are possible. WHERE...Portions of central and south central Montana. WHEN...From 6 PM this evening to 9 PM MDT Thursday. IMPACTS...Strong to dangerous crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap, and Highway 12 from Harlowton to Lavina.”

NWS severe weather mention · Sweet Grass County

“WHAT...West wind gusts of 60 to 85 mph expected. Locally higher gusts are possible. WHERE...Portions of central and south central Montana. WHEN...From 6 PM this evening to 9 PM MDT Thursday. IMPACTS...Strong to dangerous crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap, and Highway 12 from Harlowton to Lavina.”

NWS severe weather mention · Sweet Grass County

Tuesday, March 10, 2026

2 NWS warnings — wind gusts up to 80 mph

“WHAT...West wind gusts of 60 to 80 mph possible. Locally higher gusts are possible. WHERE...Portions of central and south central Montana. WHEN...From Wednesday evening through Thursday evening. IMPACTS...Strong to dangerous crosswinds could make travel difficult along Highway 191 from Big Timber through Judith Gap, and Highway 12 from Harlowton to Lavina.”

NWS severe weather mention · Sweet Grass County

“WHAT...West wind gusts of 60 to 80 mph possible. Locally higher gusts are possible. WHERE...Portions of central and south central Montana. WHEN...From Wednesday evening through Thursday evening. IMPACTS...Strong to dangerous crosswinds could make travel difficult along Highway 191 from Big Timber through Judith Gap, and Highway 12 from Harlowton to Lavina.”

NWS severe weather mention · Sweet Grass County

Sunday, March 8, 2026

1 NWS warning — wind gusts up to 75 mph

“WHAT...Strong west winds gusting to 75 mph. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...Until midnight MDT tonight. IMPACTS...Strong to dangerous crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap. Warm and dry conditions could cause rapid fire spread in grasses. Use caution with any burning activities.”

NWS severe weather mention · Sweet Grass County

Saturday, March 7, 2026

3 NWS warnings — wind gusts up to 75 mph

“WHAT...Strong west winds gusting to 75 mph. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...Until midnight MDT Sunday Night. IMPACTS...Strong to dangerous crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap. Warm and dry conditions could cause rapid fire spread in grasses. Use caution with any burning activities.”

NWS severe weather mention · Sweet Grass County

“WHAT...Periods of strong west winds gusting 60 to 75 mph occurring. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...Until midnight MDT Sunday Night. IMPACTS...Strong to dangerous crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap.”

NWS severe weather mention · Sweet Grass County

Friday, March 6, 2026

2 NWS warnings — wind gusts up to 75 mph

“WHAT...Periods of strong west winds gusting 60 to 75 mph expected. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...From 8 AM MST Saturday to midnight MDT Sunday Night. IMPACTS...Strong to dangerous crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap.”

NWS severe weather mention · Sweet Grass County

“WHAT...Periods of strong west winds gusting 60 to 75 mph expected. Gusts to 60 mph are forecast on Saturday before weakening Saturday night. Winds will increase on Sunday, becoming strong to dangerous with gusts to 75 mph. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...From 8 AM MST Saturday to midnight MDT Sunday Night.”

NWS severe weather mention · Sweet Grass County

Thursday, March 5, 2026

1 NWS warning — wind gusts up to 70 mph

“WHAT...West wind gusts up to 70 mph possible. WHERE...Portions of central and south central Montana. WHEN...From Saturday afternoon through Sunday evening. IMPACTS...Strong crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap, and Highway 12 from Harlowton to Lavina. ADDITIONAL DETAILS...Strongest period of winds will be Sunday.”

NWS severe weather mention · Sweet Grass County

Friday, February 27, 2026

2 NWS warnings — wind gusts up to 60 mph

“WHAT...West winds gusting 45 to 60 mph. WHERE...Melville Foothills and Northern Sweet Grass. WHEN...Until 9 AM MST Saturday. IMPACTS...Strong crosswinds will make travel difficult, especially along Highway 191 from Big Timber through Melville.”

NWS severe weather mention · Sweet Grass County

“WHAT...West winds gusting 50 to 65 mph, strongest near the foothills. WHERE...Portions of central and south central Montana. WHEN...Until 5 PM MST this afternoon. IMPACTS...Strong crosswinds will make travel difficult, especially along Highway 191 from Big Timber through Judith Gap. Warm and dry conditions will cause rapid fire spread in wildland grasses.”

NWS severe weather mention · Sweet Grass County

Thursday, February 26, 2026

3 NWS warnings — wind gusts up to 75 mph

“WHAT...West winds gusting 60 to 75 mph, strongest near the foothills. WHERE...Portions of central and south central Montana. WHEN...Until 5 PM MST Friday. IMPACTS...Strong crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap, and Highway 12 from Harlowton to Lavina. Warm and dry conditions could cause rapid fire spread in wildland grasses.”

NWS severe weather mention · Sweet Grass County

“WHAT...West winds gusting 50 to 70 mph, strongest near the foothills. WHERE...Portions of central and south central Montana. WHEN...Until 5 PM MST Friday. IMPACTS...Strong crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap, and Highway 12 from Harlowton to Lavina. ADDITIONAL DETAILS...Warm and dry conditions will cause rapid fire spread in wildland grasses.”

NWS severe weather mention · Sweet Grass County

Wednesday, February 25, 2026

3 NWS warnings — wind gusts up to 70 mph

“WHAT...Periods of strong west winds gusting 60 to 70 mph expected. WHERE...Portions of central and south central Montana. WHEN...Until 8 AM MST Friday. IMPACTS...Strong crosswinds will make travel difficult along US-191 from Big Timber through Judith Gap, and US-12 from Harlowton to Ryegate. ADDITIONAL DETAILS...Strongest winds are expected Thursday into Friday.”

NWS severe weather mention · Sweet Grass County

“WHAT...West winds 35 to 45 mph with gusts up to 70 mph occurring. WHERE...Portions of central and south central Montana. WHEN...Until 8 AM MST Friday. IMPACTS...Strong crosswinds will make travel difficult along US-191 from Big Timber through Judith Gap, and US-12 from Harlowton to Ryegate. ADDITIONAL DETAILS...Strongest winds are expected Thursday into Friday.”

NWS severe weather mention · Sweet Grass County

Tuesday, February 24, 2026

3 NWS warnings — wind gusts up to 70 mph

“WHAT...Periods of strong west winds of 40 to 50 mph with gusts up to 70 mph expected. WHERE...Portions of central and south central Montana. WHEN...From 2 AM Wednesday to 8 AM MST Friday. IMPACTS...Damaging winds expected. Strong crosswinds will make travel difficult along US-12 and US-191. ADDITIONAL DETAILS...Strongest winds are expected Thursday into Friday.”

NWS severe weather mention · Sweet Grass County

“WHAT...Periods of strong west winds of 40 to 50 mph with gusts up to 70 mph expected. WHERE...Portions of central and south central Montana. WHEN...From 2 AM Wednesday to 8 AM MST Friday. IMPACTS...Damaging winds expected. Strong crosswinds will make travel difficult along US-12 and US-191. ADDITIONAL DETAILS...Strongest winds are expected Thursday.”

NWS severe weather mention · Sweet Grass County

Monday, February 23, 2026

7 NWS warnings — wind gusts up to 70 mph

“WHAT...For the High Wind Warning, west winds gusting up to 60 mph expected. For the High Wind Watch, southwest winds 35 to 45 mph with gusts up to 70 mph possible. WHERE...Melville Foothills and Northern Sweet Grass. WHEN...For the High Wind Warning, until 5 AM MST Tuesday. For the High Wind Watch, from late Tuesday night through Friday morning.”

NWS severe weather mention · Sweet Grass County

“WHAT...For the High Wind Warning, west winds gusting up to 60 mph expected. For the High Wind Watch, southwest winds 35 to 45 mph with gusts up to 70 mph possible. WHERE...Melville Foothills and Northern Sweet Grass. WHEN...For the High Wind Warning, until 5 AM MST Tuesday. For the High Wind Watch, from late Tuesday night through Friday morning.”

NWS severe weather mention · Sweet Grass County

Sunday, February 22, 2026

2 NWS warnings — wind gusts up to 60 mph

“WHAT...West winds 25 to 35 mph with gusts up to 60 mph possible. WHERE...Melville Foothills and Northern Sweet Grass. WHEN...From Monday morning through late Monday night. IMPACTS...Strong crosswinds could make travel difficult along US-191 from Big Timber to Melville. ADDITIONAL DETAILS...Periods of strong to dangerous winds will continue through the remainder of the week.”

NWS severe weather mention · Sweet Grass County

“WHAT...West winds 25 to 35 mph with gusts up to 60 mph possible. WHERE...Melville Foothills and Northern Sweet Grass. WHEN...From Monday morning through late Monday night. IMPACTS...Strong crosswinds could make travel difficult along US-191 from Big Timber to Melville. ADDITIONAL DETAILS...The strongest winds are forecast late Monday through Monday night.”

NWS severe weather mention · Sweet Grass County

Saturday, February 21, 2026

1 NWS warning — wind gusts up to 60 mph

“WHAT...West winds 30 to 40 mph with gusts up to 60 mph possible. WHERE...Melville Foothills and Northern Sweet Grass. WHEN...From early Monday morning through Tuesday afternoon. IMPACTS...Strong crosswinds will make travel difficult along US-191 from Big Timber to Melville. ADDITIONAL DETAILS...Periods of strong winds will continue through the remainder of the week.”

NWS severe weather mention · Sweet Grass County

Tuesday, February 17, 2026

1 NWS warning — wind gusts up to 65 mph

“WHAT...West wind gusts up to 65 mph. WHERE...Golden Valley, Judith Gap, Southern Wheatland, Melville Foothills, Northern Stillwater, and Northern Sweet Grass. WHEN...Until 8 PM MST this evening. IMPACTS...Strong crosswinds will make travel difficult, especially for high profile vehicles. This includes Highway 191 from Big Timber through Judith Gap.”

NWS severe weather mention · Sweet Grass County

Monday, February 16, 2026

1 NWS warning — wind gusts up to 65 mph

“WHAT...West wind gusts up to 65 mph expected. WHERE...Portions of central and south central Montana. WHEN...From 8 AM to 8 PM MST Tuesday. IMPACTS...Travel will be difficult, especially for high profile vehicles.”

NWS severe weather mention · Sweet Grass County

Monday, January 26, 2026

2 NWS warnings — wind gusts up to 60 mph

“WHAT...West winds with gusts 50 to 60 mph expected. WHERE...Melville Foothills and Northern Sweet Grass. WHEN...Until 3 PM MST this afternoon. IMPACTS...Strong crosswinds will make travel difficult along Highway 191 from Big Timber through Melville. Drifting snow may produce slick spots on roadways.”

NWS severe weather mention · Sweet Grass County

“WHAT...West winds with gusts 50 to 60 mph expected. WHERE...Melville Foothills and Northern Sweet Grass. WHEN...Until 3 PM MST this afternoon. IMPACTS...Strong crosswinds will make travel difficult along Highway 191 from Big Timber through Melville. Drifting snow may produce slick spots on roadways.”

NWS severe weather mention · Sweet Grass County

Thursday, January 15, 2026

1 NWS warning — wind gusts up to 60 mph

“WHAT...Northwest winds gusting 40 to 60 mph. WHERE...Portions of central and south central Montana. WHEN...Until noon MST Friday. IMPACTS...Damaging winds could blow down trees and power lines resulting in power outages. Travel will be difficult, especially for high profile vehicles.”

NWS severe weather mention · Sweet Grass County

Monday, January 12, 2026

3 NWS warnings — wind gusts up to 65 mph

“WHAT...West winds gusting 55 to 65 mph. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...Until midnight MST tonight. IMPACTS...Strong crosswinds will make travel difficult along US-191, especially for high profile vehicles. Plan your travel accordingly. ADDITIONAL DETAILS...Winds will slowly decrease late tonight and Tuesday morning.”

NWS severe weather mention · Sweet Grass County

“WHAT...West winds gusting 55 to 65 mph. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...Until midnight MST tonight. IMPACTS...Strong crosswinds will make travel difficult along US-191, especially for high profile vehicles. Plan your travel accordingly.”

NWS severe weather mention · Sweet Grass County

Friday, December 26, 2025

1 NWS warning — wind gusts up to 55 mph

“At 104 PM MST, Doppler radar was tracking a shower near Livingston. Hazard: Wind gusts of 50 to 55 mph. Impact: Gusty winds could blow around unsecured objects. Locations impacted include... Livingston, Big Timber, Springdale and Mc Leod.”

NWS severe weather mention · Sweet Grass County

Wednesday, December 17, 2025

3 NWS warnings — wind gusts up to 80 mph

“WHAT...West winds gusting 65 to 80 mph occurring. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...Until 2 AM MST Thursday. IMPACTS...Strong crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap. The highest gusts may cause damage to trees, power lines and some structures. Secure loose outdoor items.”

NWS severe weather mention · Sweet Grass County

“WHAT...West winds gusting 65 to 75 mph expected. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...Until 2 AM MST Thursday. IMPACTS...Strong crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap. The highest gusts may cause damage to trees, power lines and some structures. Secure loose outdoor items.”

NWS severe weather mention · Sweet Grass County

Tuesday, December 16, 2025

3 NWS warnings — wind gusts up to 75 mph

“WHAT...West winds gusting 65 to 75 mph expected. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...From 2 AM Wednesday to 2 AM MST Thursday. IMPACTS...Strong crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap. The highest gusts may cause damage to trees, power lines and some structures. Secure loose outdoor items.”

NWS severe weather mention · Sweet Grass County

“WHAT...West winds gusting 65 to 75 mph expected. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...From 2 AM Wednesday to 2 AM MST Thursday. IMPACTS...Strong crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap. The highest gusts may cause damage to trees, power lines and some structures. Secure loose outdoor items.”

NWS severe weather mention · Sweet Grass County

Monday, December 15, 2025

2 NWS warnings — wind gusts up to 85 mph

“WHAT...West winds 40 to 55 mph with gusts up to 85 mph expected. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...Until 2 PM MST Tuesday. IMPACTS...Strong crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap. Localized power outages and downed trees are possible.”

NWS severe weather mention · Sweet Grass County

“WHAT...West winds 40 to 55 mph with gusts up to 85 mph expected. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...From 5 PM this afternoon to 2 PM MST Tuesday. IMPACTS...Strong crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap. Localized power outages and downed trees are possible.”

NWS severe weather mention · Sweet Grass County

Sunday, December 14, 2025

2 NWS warnings — wind gusts up to 50 mph

“WHAT...West winds 35 to 50 mph with gusts 60 to 75 mph possible. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...From Monday afternoon through Tuesday morning. IMPACTS...Damaging winds could blow down trees and power lines. Travel could be difficult, especially for high profile vehicles.”

NWS severe weather mention · Sweet Grass County

“WHAT...West winds 35 to 50 mph with gusts 60 to 75 mph possible. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...From Monday afternoon through Tuesday morning. IMPACTS...Damaging winds could blow down trees and power lines. Travel could be difficult, especially for high profile vehicles.”

NWS severe weather mention · Sweet Grass County

Thursday, December 11, 2025

1 NWS warning — wind gusts up to 70 mph

“WHAT...West winds gusting 60 to 70 mph. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...Until 5 PM MST this afternoon. IMPACTS...Strong crosswinds will make travel difficult along US-191 from Big Timber through Harlowton, especially for high profile vehicles. ADDITIONAL DETAILS...Winds will gradually decrease this afternoon.”

NWS severe weather mention · Sweet Grass County

Sunday, December 7, 2025

2 NWS warnings — wind gusts up to 70 mph

“WHAT...West winds gusting 60 to 70 mph possible. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...From Monday evening through Tuesday afternoon. IMPACTS...Hazardous crosswinds may impact travel on US-191 from Big Timber to Harlowton and Judith Gap. Secure loose outdoor objects.”

NWS severe weather mention · Sweet Grass County

“WHAT...West winds gusting 60 to 70 mph possible. WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. WHEN...From Monday evening through Tuesday afternoon. IMPACTS...Hazardous crossinds may impact travel on US-191 from Big Timber to Harlowton and Judith Gap. Secure loose outdoor objects.”

NWS severe weather mention · Sweet Grass County

Today's severe weather outlook

Storm Prediction Center Day 1 convective outlook — national severe weather risk map for today
Storm Prediction Center Day 1 convective outlook: categorical severe weather risk for today, updated several times daily. Source: NOAA/NWS Storm Prediction Center.

Common questions

When was the last severe storm in Sweet Grass County, MT?

The most recent recorded event was in September 2026. Official NWS and SPC records show 140 severe weather events in Sweet Grass County over the last 12 months. Exact dates and locations for recent storms are available in the app with a free account.

Did it hail in Sweet Grass County recently?

Yes — 28 hail reports in the last 12 months, with hail up to 0.75" recorded. The hail map above shows where reports clustered; the storm log lists each day.

How do I see hail history for a specific address in Sweet Grass County?

Create a free IDOLCheck account and run an address check. It shows verified storm reports and official NWS warning boundaries around any specific property, including the most recent 30 days — county-level pages like this one only tell part of the story.

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Proudly AI-powered. Honestly sourced. IDOLCheck is built by HailyAI. Every storm event, magnitude, radar snapshot, and date on this page is deterministic — retrieved directly from official NOAA, National Weather Service (NWS), and Storm Prediction Center (SPC) storm records through our HailyDB engine and displayed exactly as reported. Quoted warning and report text is always attributed to its official source. Where the surrounding copy is not a direct quote, it was generated with AI assistance from that same verified storm data and reviewed and approved by humans before publication. AI organizes and presents the record — it never invents storm data.
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