Walworth County Hail Map & Storm Reports
Hail, wind, and tornado reports from official NOAA sources (NWS & SPC) · Last 12 months · Updated Sep 12, 2026
Walworth County, South Dakota has recorded tornado activity: official National Weather Service (NWS) and Storm Prediction Center (SPC) records list 1 tornado report among 75 severe weather events here in the last 12 months, alongside 18 hail reports with hail up to 1.5" and 56 high-wind reports with gusts up to 80 mph. 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.
Walworth County hail map
Where hail and high-wind reports clustered across Walworth County over the last 12 months. Heat shows report density and significance, not radar.
What the radar showed
Last 30 days in Walworth County
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.
Saturday, July 25, 2026
1 NWS warning — hail up to 0.25"
“At 703 PM CDT /603 PM MDT/, Doppler radar was tracking an area of strong thunderstorms extending from over Promise to near Agar, or extending from 15 miles southwest of Mobridge to 10 miles northwest of Onida, moving northeast at 25 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.”
- Hail 0.25" Walworth County NWS severe weather mention
Friday, July 24, 2026
2 SPC verified storm reports · 1 NWS warning — hail up to 0.5", wind gusts up to 67 mph
“At 621 PM CDT, Trained spotters reported a strong thunderstorm 11 miles northeast of Java, or 12 miles southwest of Eureka, moving southeast at 45 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. The strong thunderstorm will be near...”
“Deputy Sheriff reported that power poles and branches had been damaged due to thunderstorm winds. Winds also blew a semi off the overpass. Time estimated. (ABR)”
- Wind 67 mph 4 SE Glenham SPC verified report
- Hail 0.5" Walworth County NWS severe weather mention
- Wind Unknown Selby SPC verified report
Sunday, July 19, 2026
1 NWS warning — hail up to 0.25"
“At 813 PM CDT /713 PM MDT/, Doppler radar was tracking an area of strong thunderstorms extending from 10 miles north of Mahto to 6 miles southwest of Trail City, or extending from 11 miles northeast of Mclaughlin to 14 miles east of Timber Lake, moving east at 45 mph. Hazard: Wind gusts of 50 to 55 mph and pea size hail.”
- Hail 0.25" Walworth County NWS severe weather mention
Saturday, July 18, 2026
2 SPC verified storm reports — wind gusts up to 64 mph
“ASOS station KMBG Mobridge Muni AP. (ABR)”
“Reports of a few snapped trees and a snapped power pole... as well as some minor tree damage from the winds. Time estimated by Radar. (ABR)”
- Wind 64 mph Mobridge Municipal Airp SPC verified report
- Wind Unknown Mobridge SPC verified report
Tuesday, July 7, 2026
2 NWS warnings — hail up to 0.88"
“At 750 PM CDT, Doppler radar was tracking a strong thunderstorm over New Everets Resort, or 10 miles southwest of Selby, moving east at 35 mph. Hazard: Nickel size hail. Impact: Minor hail damage to vegetation is possible. Locations impacted include... Selby, Java, Glenham, Akaska, and New Everets Resort.”
“At 721 AM CDT, Doppler radar was tracking a strong thunderstorm over Java, or 8 miles east of Selby, moving northeast at 25 mph. Hazard: Wind gusts up to 50 mph and nickel size hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include...”
- Hail 0.88" Walworth County NWS severe weather mention
- Hail 0.88" Walworth County NWS severe weather mention
Monday, July 6, 2026
2 SPC verified storm reports — hail up to 1", wind gusts up to 72 mph
“Personal weather station recorded a 72 mile per hour gust in Akaska. (ABR)”
“Report of Quarter Sized Hail in Selby sent via Facebook. (ABR)”
- Wind 72 mph Akaska SPC verified report
- Hail 1" Selby SPC verified report
Saturday, June 27, 2026
6 NWS warnings — hail up to 0.25", wind gusts up to 50 mph
“At 1119 PM CDT, Doppler radar was tracking a cluster of strong thunderstorms along a line extending from near Bowdle to near Onaka to 13 miles west of Polo. Movement was northeast 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...”
“At 1030 PM CDT, Doppler radar was tracking a cluster of strong thunderstorms along a line extending from near Akaska to 8 miles south of Cottonwood Lake Near Agar to Rousseau. Movement was northeast at 30 mph. Hazard: Wind gusts up to 50 mph. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include...”
- Wind 50 mph Walworth County NWS severe weather mention
- Wind 50 mph Walworth County NWS severe weather mention
- Wind 50 mph Walworth County NWS severe weather mention
- Wind 50 mph Walworth County NWS severe weather mention
- Wind 50 mph Walworth County NWS severe weather mention
- Hail 0.25" Walworth County NWS severe weather mention
Friday, June 26, 2026
1 SPC verified storm report — wind gusts up to 59 mph
- Wind 59 mph 5 SE Selby SPC verified report
Thursday, June 18, 2026
1 NWS warning — wind gusts up to 55 mph
“At 1016 PM CDT/916 PM MDT/, Doppler radar was tracking strong thunderstorms along a line extending from near Selfridge to near Mclaughlin to near Glencross. Movement was east at 40 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...”
- Wind 55 mph Walworth County NWS severe weather mention
Wednesday, June 17, 2026
1 NWS warning — wind gusts up to 50 mph
“WHAT...Northwest winds 20 to 30 mph with gusts up to 50 mph. WHERE...Buffalo, Hand, Hughes, Hyde, Sully, Faulk, Potter, Walworth, and Spink Counties. WHEN...Until 9 PM CDT this evening. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
- Wind 50 mph Walworth County NWS severe weather mention
Tuesday, June 16, 2026
1 NWS warning — wind gusts up to 50 mph
“WHAT...Northwest winds 25 to 35 mph with gusts up to 50 mph expected. WHERE...Buffalo, Hand, Hughes, Hyde, Sully, Faulk, Potter, Walworth, and Spink Counties. WHEN...From 10 AM to 9 PM CDT Wednesday. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
- Wind 50 mph Walworth County NWS severe weather mention
Monday, June 15, 2026
1 SPC verified storm report · 2 NWS warnings — hail up to 0.25", wind gusts up to 63 mph
“ASOS station KMBG Mobridge Muni AP. (ABR)”
“At 158 PM CDT/1258 PM MDT/, Doppler radar was tracking strong thunderstorms along a line extending from near Greenway to near Selby to Laplant. Movement was east at 40 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 hail damage to vegetation is possible. Locations impacted include...”
- Wind 63 mph Mobridge Municipal Airp SPC verified report
- Hail 0.25" Walworth County NWS severe weather mention
- Hail 0.25" Walworth County NWS severe weather mention
Monday, June 8, 2026
2 NWS warnings — hail up to 0.75"
“At 141 AM CDT, Doppler radar was tracking strong thunderstorms along a line extending from near Glenham to 6 miles southwest of Selby to 10 miles southwest of Hoven to near Gorman. Movement was east at 30 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 hail damage to vegetation is possible.”
“At 152 AM CDT, Doppler radar was tracking a strong thunderstorm near Artas, or 10 miles east of Herreid, moving northeast at 50 mph. Hazard: Wind gusts of 50 to 55 mph and half inch hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Herreid, Pollock, Mound City, Artas, and Greenway.”
- Hail 0.75" Walworth County NWS severe weather mention
- Hail 0.5" Walworth County NWS severe weather mention
Sunday, June 7, 2026
1 SPC verified storm report · 1 NWS warning — wind gusts up to 60 mph
“Mesonet station 313 Selby 5SE (SDDOT). (ABR)”
“WHAT...South winds 25 to 35 mph with gusts up to 50 mph expected. WHERE...Campbell, Corson, Dewey, Edmunds, McPherson, and Walworth Counties. WHEN...From noon CDT /11 AM MDT/ today to 8 PM CDT /7 PM MDT/ this evening. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
- Wind 60 mph 5 SW Java SPC verified report
- Wind 50 mph Walworth County NWS severe weather mention
Tuesday, June 2, 2026
1 SPC verified storm report — hail up to 1"
“Estimated nickel to quarter size hail. (ABR)”
- Hail 1" 2 N Hoven SPC verified report
Thursday, May 14, 2026
4 NWS warnings — wind gusts up to 50 mph
“AFFECTED AREA...In Minnesota, Traverse and Big Stone. In South Dakota, Corson, Campbell, McPherson, Brown, Marshall, Roberts, Walworth, Edmunds, Day, Dewey, Potter, Faulk and Grant. WINDS...West 20 to 30 mph with gusts up to 50 mph. RELATIVE HUMIDITY...As low as 17 percent. IMPACTS...Any fires that ignite will spread rapidly and become difficult to control or suppress.”
“Strong wind gusts up to 50 mph are expected to persist through the afternoon hours today. Localized stronger wind gusts of more than 50 mph will be possible as the result of sprinkles or brief showers moving through this morning into the afternoon. This will lead to patchy to areas of blowing dust and reduced visibilities between 1 to 3 miles.”
- Wind 50 mph Walworth County NWS severe weather mention
- Wind 50 mph Walworth County NWS severe weather mention
- Wind 50 mph Walworth County NWS severe weather mention
- Wind 50 mph Walworth County NWS severe weather mention
Thursday, April 23, 2026
3 NWS warnings — wind gusts up to 60 mph
“WHAT...West winds 30 to 40 mph with gusts up to 60 mph expected. WHERE...Campbell, Corson, Dewey, Edmunds, McPherson, and Walworth Counties. WHEN...Until 7 PM CDT /6 PM MDT/ this evening. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
“WHAT...West winds 30 to 40 mph with gusts up to 55 mph expected. WHERE...Campbell, Corson, Dewey, Edmunds, McPherson, and Walworth Counties. WHEN...From 11 AM CDT /10 AM MDT/ this morning to 7 PM CDT /6 PM MDT/ this evening. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
- Wind 60 mph Walworth County NWS severe weather mention
- Wind 55 mph Walworth County NWS severe weather mention
- Wind 50 mph Walworth County NWS severe weather mention
Wednesday, April 22, 2026
5 NWS warnings — hail up to 0.88", wind gusts up to 55 mph
“At 1128 PM CDT/1028 PM MDT/, Doppler radar was tracking strong thunderstorms along a line extending from 9 miles north of Glenham to near Hillsview to 6 miles northwest of North Scatterwood Lake. Movement was northeast at 60 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...”
“At 1009 PM CDT, Doppler radar was tracking strong thunderstorms along a line extending from 10 miles northeast of Hague to 7 miles west of Roscoe to near Tolstoy. Movement was northeast at 55 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...”
- Wind 55 mph Walworth County NWS severe weather mention
- Wind 55 mph Walworth County NWS severe weather mention
- Hail 0.88" Walworth County NWS severe weather mention
- Hail 0.25" Walworth County NWS severe weather mention
- Hail 0.25" Walworth County NWS severe weather mention
Tuesday, April 21, 2026
3 SPC verified storm reports — wind gusts up to 70 mph
“Mesonet station 209 Lowry (SDDOT). (ABR)”
“Mesonet station 313 Selby 5SE (SDDOT). (ABR)”
- Wind 70 mph 4 ESE Akaska SPC verified report
- Wind 68 mph 5 SW Java SPC verified report
- Wind 58 mph 5 SW Java SPC verified report
Wednesday, April 8, 2026
2 NWS warnings — wind gusts up to 50 mph
“WHAT...West winds 25 to 40 mph with gusts up to 50 mph. WHERE...Campbell, Edmunds, McPherson, and Walworth Counties. WHEN...Until 7 PM CDT this evening. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
“WHAT...West winds 30 to 35 mph with gusts up to 50 mph expected. WHERE...Campbell, Edmunds, McPherson, and Walworth Counties. WHEN...From 1 PM this afternoon to 7 PM CDT this evening. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
- Wind 50 mph Walworth County NWS severe weather mention
- Wind 50 mph Walworth County NWS severe weather mention
Tuesday, April 7, 2026
2 NWS warnings — wind gusts up to 50 mph
“WHAT...West winds 30 to 35 mph with gusts up to 50 mph expected. WHERE...Campbell, Edmunds, McPherson, and Walworth Counties. WHEN...From 1 PM to 7 PM CDT Wednesday. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
“WHAT...West winds 30 to 35 mph with gusts up to 50 mph expected. WHERE...Campbell, Edmunds, McPherson, and Walworth Counties. WHEN...From 1 PM to 7 PM CDT Wednesday. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
- Wind 50 mph Walworth County NWS severe weather mention
- Wind 50 mph Walworth County NWS severe weather mention
Thursday, March 12, 2026
5 NWS warnings — wind gusts up to 80 mph
“WHAT...Northwest winds 45 to 55 mph with gusts up to 80 mph expected. WHERE...Portions of central and north central South Dakota. WHEN...Until 1 AM CDT /midnight MDT/ Friday. IMPACTS...High winds may move loose debris, damage property and cause power outages. Travel could be difficult, especially for high profile vehicles.”
“AFFECTED AREA...In South Dakota, Corson, Campbell, McPherson, Walworth, Edmunds, Dewey, Potter, Faulk, Stanley, Sully, Hughes, Hyde, Hand, Jones, Lyman and Buffalo. WINDS...West 45 to 55 mph with gusts up to 80 mph. RELATIVE HUMIDITY...20 to 35 percent across south central South Dakota. 35 to 50 percent over north central South Dakota.”
- Wind 80 mph Walworth County NWS severe weather mention
- Wind 80 mph Walworth County NWS severe weather mention
- Wind 80 mph Walworth County NWS severe weather mention
- Wind 70 mph Walworth County NWS severe weather mention
- Wind 70 mph Walworth County NWS severe weather mention
Wednesday, March 11, 2026
5 NWS warnings — wind gusts up to 65 mph
“The National Weather Service in Aberdeen has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon CDT /11 AM MDT/ to 9 PM CDT /8 PM MDT/ Thursday. The Fire Weather Watch is no longer in effect. AFFECTED AREA...In South Dakota, Corson, Campbell, McPherson, Walworth, Edmunds, Dewey, Potter, Faulk, Stanley, Sully, Hughes, Hyde, Hand, Jones, Lyman and Buffalo.”
“AFFECTED AREA...In South Dakota, Corson, Campbell, McPherson, Walworth, Edmunds, Dewey, Potter, Faulk, Stanley, Sully, Hughes, Hyde, Hand, Jones, Lyman and Buffalo. WINDS...West 30 to 40 mph with gusts up to 65 mph. RELATIVE HUMIDITY...Down to between 20 and 35 percent. IMPACTS...Any fires that ignite will spread rapidly and become difficult to control or suppress.”
- Wind 65 mph Walworth County NWS severe weather mention
- Wind 65 mph Walworth County NWS severe weather mention
- Wind 65 mph Walworth County NWS severe weather mention
- Wind 60 mph Walworth County NWS severe weather mention
- Wind 60 mph Walworth County NWS severe weather mention
Tuesday, March 10, 2026
2 NWS warnings — wind gusts up to 55 mph
“WHAT...Northwest winds 30 to 40 mph with gusts up to 55 mph possible. WHERE...Portions of central and north central South Dakota. WHEN...From Thursday afternoon through late Thursday night. IMPACTS...High winds may move loose debris, damage property and cause power outages. Travel could be difficult, especially for high profile vehicles.”
“WHAT...Northwest winds 30 to 40 mph with gusts up to 55 mph possible. WHERE...Portions of central and north central South Dakota. WHEN...From Thursday afternoon through late Thursday night. IMPACTS...High winds may move loose debris, damage property and cause power outages. Travel could be difficult, especially for high profile vehicles.”
- Wind 55 mph Walworth County NWS severe weather mention
- Wind 55 mph Walworth County NWS severe weather mention
Wednesday, February 18, 2026
2 NWS warnings — wind gusts up to 55 mph
“WHAT...West winds 35 to 40 mph with gusts up to 55 mph. WHERE...Campbell, Corson, Edmunds, Faulk, McPherson, and Walworth Counties. WHEN...Until noon CST /11 AM MST/ today. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
“WHAT...West winds 30 to 40 mph with gusts up to 55 mph. WHERE...Portions of central and north central South Dakota. WHEN...Until noon CST /11 AM MST/ today. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
- Wind 55 mph Walworth County NWS severe weather mention
- Wind 55 mph Walworth County NWS severe weather mention
Tuesday, February 17, 2026
3 NWS warnings — wind gusts up to 55 mph
“WHAT...West winds 25 to 35 mph with gusts up to 55 mph. WHERE...Portions of central and north central South Dakota. WHEN...Until noon CST /11 AM MST/ Wednesday. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
“WHAT...West winds 25 to 35 mph with gusts up to 50 mph expected. WHERE...Portions of central and north central South Dakota. WHEN...From 9 PM CST /8 PM MST/ this evening to noon CST /11 AM MST/ Wednesday. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
- Wind 55 mph Walworth County NWS severe weather mention
- Wind 50 mph Walworth County NWS severe weather mention
- Wind 50 mph Walworth County NWS severe weather mention
Friday, January 16, 2026
1 NWS warning — wind gusts up to 55 mph
“Wind gusts will generally remain below 60 mph through the evening hours. A Winter Weather Advisory remains in effect until 12 AM CST /11 PM MST/ this evening. Wind gusts ranging from 35 to 55 mph this evening with areas of light snow and blowing snow.”
- Wind 55 mph Walworth County NWS severe weather mention
Thursday, December 18, 2025
1 NWS warning — wind gusts up to 75 mph
“WHAT...Northwest winds 40 to 50 mph with gusts up to 75 mph. WHERE...Campbell, Corson, Dewey, Potter, and Walworth Counties. WHEN...Until 3 PM CST /2 PM MST/ this afternoon. IMPACTS...High winds may move loose debris, damage property and cause power outages. Travel could be difficult, especially for high profile vehicles.”
- Wind 75 mph Walworth County NWS severe weather mention
Wednesday, December 17, 2025
2 NWS warnings — wind gusts up to 75 mph
“WHAT...Northwest winds 40 to 50 mph with gusts up to 75 mph expected. WHERE...Campbell, Corson, Dewey, Potter, and Walworth Counties. WHEN...From midnight CST /11 PM MST/ tonight to 3 PM CST /2 PM MST/ Thursday. IMPACTS...High winds may move loose debris, damage property and cause power outages. Travel could be difficult, especially for high profile vehicles.”
“WHAT...Northwest winds 40 to 50 mph with gusts up to 70 mph expected. WHERE...Campbell, Corson, Dewey, Potter, and Walworth Counties. WHEN...From midnight CST /11 PM MST/ tonight to 3 PM CST /2 PM MST/ Thursday. IMPACTS...High winds may move loose debris, damage property and cause power outages. Travel could be difficult, especially for high profile vehicles.”
- Wind 75 mph Walworth County NWS severe weather mention
- Wind 70 mph Walworth County NWS severe weather mention
Sunday, September 14, 2025
2 SPC verified storm reports — wind gusts up to 70 mph, 1 tornado report
“Report on social media of SUV with trailer flipped on highway 12 and powerlines down from tornado East of Mobridge. Time estimated by radar. (ABR)”
“Winds estimated to be 60-70 mph. Time estimated. (ABR)”
- Tornado Tornado 3 ENE Indian Creek Rec SPC verified report
- Wind 70 mph Mobridge Municipal Airp SPC verified report
Today's severe weather outlook
Common questions
When was the last severe storm in Walworth County, SD?
The most recent recorded event was in August 2026. Official NWS and SPC records show 75 severe weather events in Walworth 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 Walworth County recently?
Yes — 18 hail reports in the last 12 months, with hail up to 1.5" 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 Walworth 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.