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Storm ActivityWyoming Storm ActivityBig Horn County, WY
Wyoming · Official NOAA Storm Data

Big Horn County Storm Activity

Wind, hail, and tornado activity from official NOAA sources (NWS & SPC) · Last 12 months · Updated Sep 11, 2026

Looking for storm and wind reports in Big Horn County, Wyoming? Official National Weather Service (NWS) and Storm Prediction Center (SPC) records show 52 severe weather events in the last 12 months — 41 high-wind reports with gusts up to 70 mph, plus 11 hail reports with hail up to 0.75". The most recent recorded storm activity was in August 2026. This page updates daily: every event comes straight from official NOAA data — no estimates, no modeling, just the record.

Map of Big Horn County, Wyoming showing the county boundary and surrounding cities
Big Horn County, Wyoming. Map © Mapbox © OpenStreetMap · County boundary: US Census Bureau.

52
Events (12 mo)
11
Hail
41
Wind
0
Tornado
0.75"
Max hail
70
Max wind (mph)
August 2026
Most recent

What the radar showed

Radar snapshot during the Jan 15, 2026 wind event near Big Horn County, Big Horn County, Wyoming, with NWS warning polygons
NEXRAD radar at the moment of the Jan 15, 2026 wind event (60 mph) near Big Horn County. 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 Big Horn County

Current NEXRAD radar over Big Horn County, Wyoming with recent storm report locations
Current radar over the Big Horn 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.
August 2026 2 storm days · 1 SPC verified report · 1 NWS warning — wind to 60 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, July 8, 2026

2 NWS warnings — hail up to 0.5"

NEXRAD radar during the Wednesday, July 8, 2026 storm activity in Big Horn County, Wyoming
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 557 PM MDT, Doppler radar was tracking an area of strong thunderstorms extending from 40 miles south of Ashland to 30 miles east of Sheridan, or extending from 35 miles northeast of Sheridan to 30 miles east of Sheridan, moving east at 30 mph. Hazard: Wind gusts up to 50 mph and half inch size hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects.”

NWS severe weather mention · Big Horn County

“At 411 PM MDT, Doppler radar was tracking an area of strong thunderstorms 13 miles northwest of Dayton, or 29 miles northwest of Sheridan, moving east at 30 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 · Big Horn County

Monday, July 6, 2026

1 NWS warning — hail up to 0.75"

“At 842 PM MDT, Doppler radar was tracking a strong thunderstorm 27 miles south of Fort Smith over the Bighorn Mountains, or 39 miles west of Sheridan, moving east at 25 mph. Hazard: Wind gusts up to 40 mph and penny size hail, along with very 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 · Big Horn County

Friday, July 3, 2026

1 NWS warning — hail up to 0.5"

“At 652 PM MDT, Doppler radar was tracking a strong thunderstorm 13 miles north of Sheridan, moving southeast at 25 mph. Hazard: Wind gusts up to 50 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... Tongue River Reservoir.”

NWS severe weather mention · Big Horn County

Thursday, July 2, 2026

1 NWS warning — hail up to 0.5"

“At 536 PM MDT, Doppler radar was tracking a strong thunderstorm 15 miles northeast of Sheridan, moving northeast 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 · Big Horn County

Friday, June 26, 2026

1 NWS warning — hail up to 0.5"

“At 702 PM MDT, Doppler radar was tracking an area of strong thunderstorms 26 miles south of Ashland, or 40 miles west of Broadus, moving northeast at 35 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 · Big Horn County

Thursday, June 25, 2026

1 NWS warning — hail up to 0.75"

“At 257 PM MDT, Doppler radar was tracking a strong thunderstorm 25 miles east of Sheridan, moving east at 25 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 · Big Horn County

Sunday, June 7, 2026

3 NWS warnings — hail up to 0.75"

NEXRAD radar during the Sunday, June 7, 2026 storm activity in Big Horn County, Wyoming
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 732 PM MDT, Doppler radar was tracking a line of strong thunderstorms extending from near Ashland to 33 miles east of Sheridan, or extending from 23 miles southeast of Colstrip to 33 miles east of Sheridan, moving east at 55 mph. Hazard: Wind gusts of up to 55 mph and penny size hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects.”

NWS severe weather mention · Big Horn County

“At 233 PM MDT, Doppler radar was tracking an area of thunderstorms extending from 12 miles west of Fort Smith to 13 miles south of Sheridan, or extending from 37 miles southeast of Billings to 13 miles south of Sheridan, moving northeast at 35 mph. Hazard: Line of storms over the Bighorn mountains are expected to rapidly intensify as they mover northeast into the foothills.”

NWS severe weather mention · Big Horn County

Friday, April 17, 2026

2 NWS warnings — wind gusts up to 50 mph

NEXRAD radar during the Friday, April 17, 2026 storm activity in Big Horn County, Wyoming
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 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 · Big Horn County

“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 · Big Horn County

Thursday, April 2, 2026

1 NWS warning — hail up to 0.5"

“At 646 PM MDT, Doppler radar was tracking thunderstorms 25 miles south of Busby, or 26 miles north of Sheridan, moving east at 25 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 · Big Horn County

Thursday, March 12, 2026

2 NWS warnings — wind gusts up to 70 mph

“WHAT...West winds with gusts of 50 to 70 mph expected. Locally higher gusts are possible. WHERE...In Montana, Bighorn Canyon, Red Lodge Foothills, and Southern Big Horn. In Wyoming, Sheridan Foothills. WHEN...Until 9 PM MDT this evening. IMPACTS...Extreme wind gusts could blow down trees and power lines. Power outages are possible. Travel could be difficult for high profile vehicles.”

NWS severe weather mention · Big Horn County

“WHAT...West winds with gusts of 50 to 70 mph expected. Locally higher gusts are possible. WHERE...In Montana, Bighorn Canyon, Red Lodge Foothills, and Southern Big Horn. In Wyoming, Sheridan Foothills. WHEN...Until 9 PM MDT this evening. IMPACTS...Extreme wind gusts could blow down trees and power lines. Power outages are possible. Travel could be difficult for high profile vehicles.”

NWS severe weather mention · Big Horn County

Wednesday, March 11, 2026

2 NWS warnings — wind gusts up to 70 mph

“WHAT...West winds with gusts of 50 to 70 mph possible. Locally higher gusts are possible. WHERE...Portions of central and south central Montana and north central Wyoming. WHEN...From late tonight through Thursday evening. IMPACTS...Damaging winds could blow down trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles.”

NWS severe weather mention · Big Horn County

“WHAT...West winds with gusts of 50 to 70 mph possible. Locally higher gusts are possible. WHERE...Portions of central and south central Montana and north central Wyoming. WHEN...From late tonight through Thursday evening. IMPACTS...Damaging winds could blow down trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles.”

NWS severe weather mention · Big Horn County

Tuesday, March 10, 2026

4 NWS warnings — wind gusts up to 70 mph

“WHAT...West winds with gusts of 50 to 70 mph possible. Locally higher gusts are possible. WHERE...Portions of central and south central Montana and north central Wyoming. WHEN...From late Wednesday night through Thursday evening. IMPACTS...Damaging winds could blow down trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles.”

NWS severe weather mention · Big Horn County

“WHAT...West winds with gusts of 50 to 70 mph possible. Locally higher gusts are possible. WHERE...Portions of central and south central Montana and north central Wyoming. WHEN...From late Wednesday night through Thursday evening. IMPACTS...Damaging winds could blow down trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles.”

NWS severe weather mention · Big Horn County

Monday, February 23, 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...In Montana, Bighorn Canyon and Southern Big Horn. In Wyoming, Sheridan Foothills. WHEN...From 8 PM MST this evening through Tuesday morning. IMPACTS...Travel could be difficult, especially for high profile vehicles. Expect crosswinds to be sudden and erratic.”

NWS severe weather mention · Big Horn County

“WHAT...Southwest to west winds gusting 40 to 60 mph possible. WHERE...In Montana, Bighorn Canyon and Southern Big Horn. In Wyoming, Sheridan Foothills. WHEN...From this evening through Tuesday morning. IMPACTS...Travel could be difficult, especially for high profile vehicles. Expect crosswinds to be sudden and erratic.”

NWS severe weather mention · Big Horn County

Tuesday, February 17, 2026

3 NWS warnings — wind gusts up to 70 mph

“WHAT...West wind gusts 50 to 70 mph. WHERE...In Montana, Bighorn Canyon, Pryor/Northern Bighorn Mountains, Red Lodge Foothills, Southeastern Carbon, and Southern Big Horn. In Wyoming, Northeast Bighorn Mountains and Sheridan Foothills. WHEN...Until 8 PM MST this evening. IMPACTS...Travel will be difficult, especially for high profile vehicles.”

NWS severe weather mention · Big Horn County

“WHAT...Southwest winds gusting 50 to 70 mph. WHERE...Portions of south central Montana and north central Wyoming. WHEN...Until 8 PM MST this evening. IMPACTS...Travel will be difficult, especially for high profile vehicles. Damaging winds may blow down trees and power lines, and power outages are possible. Warm and dry conditions could cause rapid fire spread in wildland grasses.”

NWS severe weather mention · Big Horn County

Monday, February 16, 2026

3 NWS warnings — wind gusts up to 70 mph

“WHAT...Southwest winds gusting 50 to 70 mph expected. WHERE...Portions of south central Montana and north central Wyoming. WHEN...Until 8 PM MST Tuesday. IMPACTS...Travel will be difficult, especially for high profile vehicles. Damaging winds may blow down trees and power lines, and power outages are possible. Warm and dry conditions could cause rapid fire spread.”

NWS severe weather mention · Big Horn County

“WHAT...Southwest winds gusts up to 70 mph expected. WHERE...Portions of south central Montana and north central Wyoming. WHEN...From 11 PM this evening to 8 PM MST Tuesday. IMPACTS...Damaging winds will blow down trees and power lines. Scattered power outages are expected. Travel will be difficult, especially for high profile vehicles. Warm and dry conditions could cause rapid fire spread.”

NWS severe weather mention · Big Horn County

Thursday, January 15, 2026

2 NWS warnings — wind gusts up to 60 mph

NEXRAD radar during the Thursday, January 15, 2026 storm activity in Big Horn County, Wyoming
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...Northwest winds gusting 40 to 60 mph. WHERE...In Montana, Southern Big Horn. In Wyoming, Sheridan Foothills. WHEN...Until 5 PM 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. This includes travel along Interstate 90.”

NWS severe weather mention · Big Horn County

“At 440 PM MST, an area of snow was located over Sheridan and Southern Big Horn counties. Locations impacted include... Sheridan, Ranchester, Dayton, Big Horn, Wyola, Parkman, Banner, and Ucross. Web cams show a slushy snow accumulation over the higher hills along I-90. Visibility will be near a mile at times due to snowfall and blowing snow, with northerly winds gusting 40 to 60 mph at times.”

NWS severe weather mention · Big Horn County

Wednesday, January 7, 2026

1 NWS warning — wind gusts up to 50 mph

NEXRAD radar during the Wednesday, January 7, 2026 storm activity in Big Horn County, Wyoming
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 311 PM MST, Doppler radar was tracking a line of showers extending from 26 miles northeast of Sheridan to 9 miles west of Dayton, or extending from 26 miles northeast of Sheridan to 25 miles west of Sheridan, moving south 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...”

NWS severe weather mention · Big Horn County

Friday, December 26, 2025

1 NWS warning — wind gusts up to 60 mph

NEXRAD radar during the Friday, December 26, 2025 storm activity in Big Horn County, Wyoming
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 849 PM MST, Gusty southwest to west winds will affect the east side of the Bighorn Mountains through the remainder of the evening. Winds could be erratic, surging suddenly down the mountains. Strongest winds can be expected between now and midnight. Winds will gradually decrease overnight. Hazard: Wind gusts of 40 to 60 mph.”

NWS severe weather mention · Big Horn County

Friday, December 19, 2025

2 NWS warnings — wind gusts up to 65 mph

“WHAT...Southwest to west winds with gusts of 50 to 65 mph. Locally higher gusts possible. WHERE...In Montana, Bighorn Canyon and Southern Big Horn. In Wyoming, Sheridan Foothills. WHEN...Until 2 PM MST this afternoon. IMPACTS...Damaging winds could blow down trees and power lines. Travel will be difficult, especially for high profile vehicles. This includes travel on I-90 through Sheridan.”

NWS severe weather mention · Big Horn County

“WHAT...Southwest to west winds with gusts of 50 to 65 mph. WHERE...In Montana, Bighorn Canyon and Southern Big Horn. In Wyoming, Sheridan Foothills. WHEN...Until 2 PM MST this afternoon. IMPACTS...Damaging winds could blow down trees and power lines. Travel will be difficult, especially for high profile vehicles. This includes travel on I-90 through Sheridan.”

NWS severe weather mention · Big Horn County

Thursday, December 18, 2025

5 NWS warnings — wind gusts up to 65 mph

“WHAT...Southwest to west winds with gusts of 50 to 65 mph. WHERE...In Montana, Bighorn Canyon and Southern Big Horn. In Wyoming, Sheridan Foothills. WHEN...From 8 PM this evening to 2 PM MST Friday. IMPACTS...Damaging winds could blow down trees and power lines. Travel will be difficult, especially for high profile vehicles. This includes travel on I-90 through Sheridan.”

NWS severe weather mention · Big Horn County

“WHAT...Southwest to west winds with gusts of 50 to 65 mph possible. WHERE...In Montana, Bighorn Canyon and Southern Big Horn. In Wyoming, Sheridan Foothills. WHEN...From this evening through Friday afternoon. IMPACTS...Damaging winds could blow down trees and power lines. Travel could be difficult, especially for high profile vehicles. This includes travel on I-90 through Sheridan.”

NWS severe weather mention · Big Horn County

Wednesday, December 17, 2025

3 NWS warnings — wind gusts up to 70 mph

“WHAT...Northwest winds with gusts 60 to 70 mph occurring. WHERE...In Montana, Bighorn Canyon and Southern Big Horn. In Wyoming, Sheridan Foothills. WHEN...Until 2 AM MST Thursday. IMPACTS...Damaging winds may blow down trees and power lines. Travel will be difficult, especially for high profile vehicles. This includes travel on I-90 through Sheridan. Secure loose outdoor items.”

NWS severe weather mention · Big Horn County

“WHAT...West winds gusting 55 to 70 mph occurring. WHERE...In Montana, Bighorn Canyon and Southern Big Horn. In Wyoming, Sheridan Foothills. WHEN...Until 2 AM MST Thursday. IMPACTS...Damaging winds may blow down trees and power lines. Travel will be difficult, especially for high profile vehicles. This includes travel on I-90 through Sheridan. Secure loose outdoor items.”

NWS severe weather mention · Big Horn County

Tuesday, December 16, 2025

5 NWS warnings — wind gusts up to 70 mph

NEXRAD radar during the Tuesday, December 16, 2025 storm activity in Big Horn County, Wyoming
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...Southwest to west winds gusts 55 to 70 mph expected. WHERE...In Montana, Bighorn Canyon and Southern Big Horn. In Wyoming, Sheridan Foothills. WHEN...From 2 AM Wednesday to 2 AM MST Thursday. IMPACTS...Damaging winds may blow down trees and power lines. Travel will be difficult, especially for high profile vehicles. This includes travel on I-90 through Sheridan. Secure loose outdoor items.”

NWS severe weather mention · Big Horn County

“WHAT...Southwest to west winds gusts 55 to 70 mph expected. WHERE...In Montana, Bighorn Canyon and Southern Big Horn. In Wyoming, Sheridan Foothills. WHEN...From 2 AM Wednesday to 2 AM MST Thursday. IMPACTS...Damaging winds may blow down trees and power lines. Travel will be difficult, especially for high profile vehicles. This includes travel on I-90 through Sheridan. Secure loose outdoor items.”

NWS severe weather mention · Big Horn County

Friday, October 10, 2025

2 SPC verified storm reports — wind gusts up to 66 mph

NEXRAD radar during the Friday, October 10, 2025 storm activity in Big Horn County, Wyoming
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 TT631 Willow Creek. (RIW)”

SPC verified report · 15 E Lovell

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 Big Horn County, WY?

The most recent recorded event was in August 2026. Official NWS and SPC records show 52 severe weather events in Big Horn County over the last 12 months. Exact dates and locations for recent storms are available in the app with a free account.

Has there been hail in Big Horn County recently?

Yes — 11 hail reports in the last 12 months, with hail up to 0.75" recorded.

How do I check whether a specific address was affected?

Create a free IDOLCheck account and run an address check. It shows verified storm reports and official NWS warning boundaries around any specific property — 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.