Corson County Hail Map & Storm Reports
Hail, wind, and tornado reports from official NOAA sources (NWS & SPC) · Last 12 months · Updated Sep 14, 2026
Corson County, South Dakota has recorded tornado activity: official National Weather Service (NWS) and Storm Prediction Center (SPC) records list 1 tornado report among 85 severe weather events here in the last 12 months, alongside 17 hail reports with hail up to 1.5" and 67 high-wind reports with gusts up to 80 mph. 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.
Corson County hail map
Where hail and high-wind reports clustered across Corson County over the last 12 months. Heat shows report density and significance, not radar.
What the radar showed
Last 30 days in Corson 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.
Monday, August 3, 2026
1 NWS warning — wind gusts up to 50 mph
“...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT /9 PM CDT/ THIS EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF CENTRAL AND NORTH CENTRAL SOUTH DAKOTA... AFFECTED AREA...Portions of central and north central South Dakota. TIMING...Until 9 PM CDT /8 PM MDT/ this evening. WINDS...North winds 25 to 35 mph with gusts up to 50 mph.”
- Wind 50 mph Corson County NWS severe weather mention
Friday, July 24, 2026
2 SPC verified storm reports · 1 NWS warning — hail up to 0.75", wind gusts up to 64 mph
“Mesonet station GRRS2 Bullhead 10 S... Time estimated by Radar. (ABR)”
“Mesonet station 178 Trail City (SDDOT). (ABR)”
- Wind 64 mph 11 S Bullhead SPC verified report
- Wind 62 mph 4 W Trail City SPC verified report
- Hail 0.75" Corson County NWS severe weather mention
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" Corson County NWS severe weather mention
Saturday, July 18, 2026
1 SPC verified storm report — wind gusts up to 59 mph
“Mesonet station 337 Isabel 13 N (SDDOT). (ABR)”
- Wind 59 mph 5 SSW Klein Ranch SPC verified report
Tuesday, July 7, 2026
1 NWS warning — hail up to 0.75"
“At 624 AM MDT, Doppler radar was tracking a strong thunderstorm near Little Moreau Rec Area, or near Timber Lake, moving northeast at 30 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 hail damage to vegetation is possible. Locations impacted include...”
- Hail 0.75" Corson County NWS severe weather mention
Thursday, July 2, 2026
3 NWS warnings — hail up to 0.88"
“At 524 AM MDT, Doppler radar was tracking a strong thunderstorm near Black Horse, or 19 miles west of Bullhead, moving east at 15 mph. Hazard: Nickel size hail. Impact: Minor hail damage to vegetation is possible. Locations impacted include... Klein Ranch, Black Horse, and southern Standing Rock Nation.”
“At 457 AM MDT, Doppler radar was tracking a strong thunderstorm 10 miles south of Morristown, or 26 miles southeast of Lemmon, moving east at 30 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... Black Horse.”
- Hail 0.88" Corson County NWS severe weather mention
- Hail 0.88" Corson County NWS severe weather mention
- Hail 0.75" Corson County NWS severe weather mention
Monday, June 29, 2026
1 NWS warning — hail up to 0.75"
“At 229 AM MDT, Doppler radar was tracking a strong thunderstorm 7 miles east of White Horse, or 19 miles southeast of Timber Lake, moving north at 55 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 hail damage to vegetation is possible. Locations impacted include...”
- Hail 0.75" Corson County NWS severe weather mention
Saturday, June 27, 2026
5 NWS warnings — hail up to 0.88", wind gusts up to 50 mph
“WHAT...Southeast winds 25 to 35 mph with gusts up to 50 mph. WHERE...Portions of central and north central South Dakota. 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...Southeast winds 25 to 35 mph with gusts up to 50 mph expected. WHERE...Portions of central and north central South Dakota. 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.”
- Wind 50 mph Corson County NWS severe weather mention
- Wind 50 mph Corson County NWS severe weather mention
- Wind 50 mph Corson County NWS severe weather mention
- Hail 0.88" Corson County NWS severe weather mention
- Hail 0.25" Corson County NWS severe weather mention
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 Corson County NWS severe weather mention
Tuesday, June 16, 2026
1 NWS warning — wind gusts up to 50 mph
“WHAT...Northwest winds 30 to 40 mph with gusts up to 50 mph expected. WHERE...Corson and Dewey Counties. WHEN...From 9 AM to 8 PM MDT Wednesday. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
- Wind 50 mph Corson County NWS severe weather mention
Monday, June 15, 2026
1 SPC verified storm report · 1 NWS warning — hail up to 0.25", wind gusts up to 64 mph
“Mesonet station 205 McLaughlin (SDDOT). (ABR)”
“At 127 PM CDT/1227 PM MDT/, Doppler radar was tracking a strong thunderstorm near Kenel, or 11 miles northeast of Wakpala, moving east 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 hail damage to vegetation is possible. Locations impacted include... Herreid, Kenel, and Mound City.”
- Wind 64 mph 5 WNW Mclaughlin SPC verified report
- Hail 0.25" Corson County NWS severe weather mention
Monday, June 8, 2026
1 SPC verified storm report — wind gusts up to 60 mph
- Wind 60 mph Mclaughlin SPC verified report
Sunday, June 7, 2026
1 SPC verified storm report · 3 NWS warnings — hail up to 0.5", wind gusts up to 61 mph
“Mesonet station GRRS2 Bullhead 10 S. Time estimated by radar. (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 61 mph 11 S Bullhead SPC verified report
- Wind 50 mph Corson County NWS severe weather mention
- Hail 0.5" Corson County NWS severe weather mention
- Hail 0.5" Corson County NWS severe weather mention
Saturday, June 6, 2026
1 NWS warning — wind gusts up to 50 mph
“WHAT...Southeast winds 25 to 35 mph with gusts up to 50 mph expected. WHERE...Corson and Dewey Counties. WHEN...From noon today to 11 PM MDT this evening. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
- Wind 50 mph Corson County NWS severe weather mention
Tuesday, June 2, 2026
1 NWS warning — hail up to 0.88"
“At 501 PM MDT, Doppler radar was tracking a strong thunderstorm over Walker, or 9 miles north of Bullhead, moving north at 20 mph. Hazard: Nickel size hail. Impact: Minor hail damage to vegetation is possible. Locations impacted include... Walker and southern Standing Rock Nation.”
- Hail 0.88" Corson County NWS severe weather mention
Sunday, May 24, 2026
1 NWS warning — hail up to 0.25"
“At 912 PM CDT/812 PM MDT/, Doppler radar was tracking a strong thunderstorm near Pollock, or 13 miles west of Herreid, moving east 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 hail damage to vegetation is possible. Locations impacted include... Herreid, Pollock, Kenel, and Mound City.”
- Hail 0.25" Corson County NWS severe weather mention
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 Corson County NWS severe weather mention
- Wind 50 mph Corson County NWS severe weather mention
- Wind 50 mph Corson County NWS severe weather mention
- Wind 50 mph Corson County NWS severe weather mention
Wednesday, May 13, 2026
10 NWS warnings — wind gusts up to 50 mph
“AFFECTED AREA...In South Dakota, Corson and Dewey. WINDS...West 25 to 35 mph with gusts up to 50 mph. RELATIVE HUMIDITY...As low as 14 percent. IMPACTS...Any fires that ignite will spread rapidly and become difficult to control or suppress.”
“AFFECTED AREA...In South Dakota, Corson and Dewey. WINDS...West 25 to 35 mph with gusts up to 50 mph. RELATIVE HUMIDITY...As low as 14 percent. IMPACTS...Any fires that ignite will spread rapidly and become difficult to control or suppress.”
- Wind 50 mph Corson County NWS severe weather mention
- Wind 50 mph Corson County NWS severe weather mention
- Wind 50 mph Corson County NWS severe weather mention
- Wind 50 mph Corson County NWS severe weather mention
- Wind 50 mph Corson County NWS severe weather mention
- Wind 50 mph Corson County NWS severe weather mention
- Wind 50 mph Corson County NWS severe weather mention
- Wind 50 mph Corson County NWS severe weather mention
- Wind 50 mph Corson County NWS severe weather mention
- Wind 50 mph Corson 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 Corson County NWS severe weather mention
- Wind 55 mph Corson County NWS severe weather mention
- Wind 50 mph Corson County NWS severe weather mention
Wednesday, April 22, 2026
3 NWS warnings — hail up to 0.25", 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 930 PM CDT/830 PM MDT/, Doppler radar was tracking strong thunderstorms along a line extending from Strasburg to 7 miles north of Gettysburg to 7 miles north of Wood. Movement was northeast at 55 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.”
- Wind 55 mph Corson County NWS severe weather mention
- Hail 0.25" Corson County NWS severe weather mention
- Hail 0.25" Corson County NWS severe weather mention
Wednesday, April 8, 2026
3 NWS warnings — wind gusts up to 55 mph
“WHAT...Northwest winds 30 to 40 mph with gusts up to 55 mph. WHERE...Corson and Dewey Counties. WHEN...Until 6 PM MDT this evening. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
“WHAT...Northwest winds 30 to 40 mph with gusts up to 50 mph expected. WHERE...Corson and Dewey Counties. WHEN...Until 6 PM MDT this evening. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
- Wind 55 mph Corson County NWS severe weather mention
- Wind 50 mph Corson County NWS severe weather mention
- Wind 50 mph Corson County NWS severe weather mention
Tuesday, April 7, 2026
2 NWS warnings — wind gusts up to 50 mph
“WHAT...West winds 30 to 40 mph with gusts up to 50 mph expected. WHERE...Corson and Dewey Counties. WHEN...From 9 AM to 6 PM MDT Wednesday. 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 50 mph expected. WHERE...Corson and Dewey Counties. WHEN...From 9 AM to 6 PM MDT Wednesday. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
- Wind 50 mph Corson County NWS severe weather mention
- Wind 50 mph Corson 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 Corson County NWS severe weather mention
- Wind 80 mph Corson County NWS severe weather mention
- Wind 80 mph Corson County NWS severe weather mention
- Wind 70 mph Corson County NWS severe weather mention
- Wind 70 mph Corson 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 Corson County NWS severe weather mention
- Wind 65 mph Corson County NWS severe weather mention
- Wind 65 mph Corson County NWS severe weather mention
- Wind 60 mph Corson County NWS severe weather mention
- Wind 60 mph Corson 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 Corson County NWS severe weather mention
- Wind 55 mph Corson County NWS severe weather mention
Wednesday, February 18, 2026
6 NWS warnings — wind gusts up to 60 mph
“WHAT...Northwest winds 35 to 40 mph with gusts up to 60 mph. WHERE...Corson County. WHEN...Until 1 PM MST this afternoon. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
“WHAT...Northwest winds 35 to 45 mph with gusts up to 55 mph. WHERE...Corson County. WHEN...Until 11 AM MST this morning. IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.”
- Wind 60 mph Corson County NWS severe weather mention
- Wind 55 mph Corson County NWS severe weather mention
- Wind 55 mph Corson County NWS severe weather mention
- Wind 55 mph Corson County NWS severe weather mention
- Wind 55 mph Corson County NWS severe weather mention
- Wind 50 mph Corson 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 Corson County NWS severe weather mention
- Wind 50 mph Corson County NWS severe weather mention
- Wind 50 mph Corson 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 Corson 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 Corson 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 Corson County NWS severe weather mention
- Wind 70 mph Corson County NWS severe weather mention
Sunday, September 14, 2025
1 SPC verified storm report — 1 tornado report
- Tornado Tornado 8 NE Wakpala SPC verified report
Today's severe weather outlook
Common questions
When was the last severe storm in Corson County, SD?
The most recent recorded event was in September 2026. Official NWS and SPC records show 85 severe weather events in Corson 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 Corson County recently?
Yes — 17 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 Corson 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.