Union County Storm Activity
Wind, hail, and tornado activity from official NOAA sources (NWS & SPC) · Last 12 months · Updated Sep 11, 2026
Has it hailed in Union County, Iowa recently? Official National Weather Service (NWS) and Storm Prediction Center (SPC) records say yes: 3 hail reports with hail up to 1", among 63 severe weather events logged here in the last 12 months, together with 60 high-wind reports with gusts up to 70 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.
What the radar showed
Last 30 days in Union 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.
Wednesday, June 17, 2026
2 NWS warnings — wind gusts up to 50 mph
“WHAT...Northwest winds 20 to 30 mph with gusts up to 50 mph. WHERE...Portions of northwest and west central Iowa, southwest Minnesota, northeast Nebraska, and east central and southeast South Dakota. WHEN...Until 9 PM CDT this evening. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
“WHAT...Northwest winds 20 to 30 mph with gusts up to 50 mph expected. WHERE...Portions of northwest and west central Iowa, southwest Minnesota, northeast Nebraska, and east central and southeast South Dakota. WHEN...From 1 PM this afternoon to 9 PM CDT this evening. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
- Wind 50 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
Tuesday, June 16, 2026
2 NWS warnings — wind gusts up to 50 mph
“WHAT...Northwest winds 20 to 30 mph with gusts up to 50 mph expected. WHERE...Portions of northwest and west central Iowa, southwest Minnesota, northeast Nebraska, and east central and southeast South Dakota. WHEN...From 1 PM to 9 PM CDT Wednesday. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
“WHAT...Northwest winds 20 to 30 mph with gusts up to 50 mph expected. WHERE...Portions of northwest and west central Iowa, southwest Minnesota, northeast Nebraska, and east central and southeast South Dakota. WHEN...From 1 PM to 9 PM CDT Wednesday. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
- Wind 50 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
Thursday, June 11, 2026
1 SPC verified storm report
“Delayed report - time estimated from radar. Received photos via email of tree damage in Lorimor... IA. (DMX)”
- Wind Unknown S Lorimor SPC verified report
Wednesday, June 10, 2026
2 SPC verified storm reports — hail up to 1", wind gusts up to 70 mph
- Wind 70 mph Creston SPC verified report
- Hail 1" Creston SPC verified report
Monday, May 18, 2026
1 NWS warning — wind gusts up to 55 mph
“WHAT...Gusty east to southeast winds will occur on the backside of the departing thunderstorms. Gusts of 40 to 55 mph are expected and may last up to an hour. WHERE...Much of Central, North Central and South Central Iowa. WHEN...During the pre-dawn hours this morning. IMPACTS...Unsecured outdoor objects may be blown around and smaller tree branches may break.”
- Wind 55 mph Union County NWS severe weather mention
Thursday, May 14, 2026
2 NWS warnings — wind gusts up to 50 mph
“AFFECTED AREA...In Iowa, Lyon, Osceola, Dickinson, Sioux, O'Brien, Clay, Plymouth, Cherokee, Buena Vista, Woodbury and Ida. In Minnesota, Cottonwood, Nobles, Jackson and Rock. In Nebraska, Dixon and Dakota. In South Dakota, Hanson, McCook, Minnehaha, Hutchinson, Turner, Lincoln, Bon Homme, Yankton, Clay and Union. WINDS...South 25 to 35 mph with gusts up to 50 mph.”
“AFFECTED AREA...In Iowa, Lyon, Osceola, Dickinson, Sioux, O'Brien, Clay, Plymouth, Cherokee, Buena Vista, Woodbury and Ida. In Minnesota, Cottonwood, Nobles, Jackson and Rock. In Nebraska, Dixon and Dakota. In South Dakota, Hanson, McCook, Minnehaha, Hutchinson, Turner, Lincoln, Bon Homme, Yankton, Clay and Union. WINDS...South 25 to 35 mph with gusts up to 50 mph.”
- Wind 50 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
Wednesday, May 13, 2026
2 NWS warnings — wind gusts up to 50 mph
“AFFECTED AREA...In Iowa, Lyon, Osceola, Dickinson, Sioux, O'Brien, Clay, Plymouth, Cherokee, Buena Vista, Woodbury and Ida. In Minnesota, Cottonwood, Nobles, Jackson and Rock. In Nebraska, Dixon and Dakota. In South Dakota, Hanson, McCook, Minnehaha, Hutchinson, Turner, Lincoln, Bon Homme, Yankton, Clay and Union. WINDS...South 25 to 35 mph with gusts up to 50 mph.”
“The National Weather Service in Sioux Falls has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 10 AM to 7 PM CDT Thursday. AFFECTED AREA...In Iowa, Lyon, Osceola, Dickinson, Sioux, O'Brien, Clay, Plymouth, Cherokee, Buena Vista, Woodbury and Ida. In Minnesota, Cottonwood, Nobles, Jackson and Rock. In Nebraska, Dixon and Dakota.”
- Wind 50 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
Tuesday, April 14, 2026
1 SPC verified storm report — wind gusts up to 60 mph
- Wind 60 mph Creston SPC verified report
Thursday, April 9, 2026
2 NWS warnings — hail up to 0.75"
“At 644 PM CDT, Doppler radar was tracking a strong thunderstorm over Grant, or 15 miles northwest of Corning, moving east at 40 mph. Hazard: Penny size hail and heavy rainfall of one to two inches. Impact: Minor hail damage to vegetation is possible. Ponding of water on roadways, low visibilities, and rises in small streams and creeks. Locations impacted include...”
“At 806 PM CDT, Doppler radar was tracking a strong thunderstorm 5 miles northeast of Villisca, or 8 miles west of Corning, moving east at 50 mph. Hazard: Wind gusts up to 50 mph, half inch hail, and additional rainfall up to one inch. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible.”
- Hail 0.75" Union County NWS severe weather mention
- Hail 0.5" Union County NWS severe weather mention
Saturday, March 28, 2026
3 NWS warnings — wind gusts up to 50 mph
“AFFECTED AREA...In Iowa, Lyon, Osceola, Dickinson, Sioux, O'Brien, Clay, Plymouth, Cherokee, Buena Vista, Woodbury and Ida. In Minnesota, Lincoln, Lyon, Murray, Cottonwood, Nobles, Jackson, Pipestone and Rock. In Nebraska, Dixon and Dakota.”
“AFFECTED AREA...In Iowa, Lyon, Osceola, Dickinson, Sioux, O'Brien, Clay, Plymouth, Cherokee, Buena Vista, Woodbury and Ida. In Minnesota, Lincoln, Lyon, Murray, Cottonwood, Nobles, Jackson, Pipestone and Rock. In Nebraska, Dixon and Dakota.”
- Wind 50 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
Friday, March 27, 2026
3 NWS warnings — wind gusts up to 50 mph
“AFFECTED AREA...In Iowa, Lyon, Osceola, Dickinson, Sioux, O'Brien, Clay, Plymouth, Cherokee, Buena Vista, Woodbury and Ida. In Minnesota, Lincoln, Lyon, Murray, Cottonwood, Nobles, Jackson, Pipestone and Rock. In Nebraska, Dixon and Dakota.”
“The National Weather Service in Sioux Falls has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 10 AM to 9 PM CDT Saturday. The Fire Weather Watch is no longer in effect. AFFECTED AREA...In Iowa, Lyon, Osceola, Dickinson, Sioux, O'Brien, Clay, Plymouth, Cherokee, Buena Vista, Woodbury and Ida.”
- Wind 50 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
Sunday, March 15, 2026
10 NWS warnings — wind gusts up to 65 mph
“...BLIZZARD CONDITIONS DEVELOPING AND PERSISTING TONIGHT... .A significant winter storm will move across the area through tonight. Widespread snow will fall across Iowa with higher amounts of 6+ inches possible north and east. Winds will gust 55 to 65+ mph, resulting in significant drifting of snow and visibility reductions to white-out conditions at times.”
“WHAT...Northwest winds 30 to 40 mph with gusts up to 55 to 65 mph expected. The highest wind gusts will be late this afternoon and this evening. WHERE...Portions of central, north central, northeast, northwest, south central, southeast, southwest, and west central Iowa. WHEN...Until 4 AM CDT Monday. IMPACTS...Damaging winds could blow down trees and power lines. Power outages are possible.”
- Wind 65 mph Union County NWS severe weather mention
- Wind 65 mph Union County NWS severe weather mention
- Wind 60 mph Union County NWS severe weather mention
- Wind 60 mph Union County NWS severe weather mention
- Wind 60 mph Union County NWS severe weather mention
- Wind 60 mph Union County NWS severe weather mention
- Wind 60 mph Union County NWS severe weather mention
- Wind 55 mph Union County NWS severe weather mention
- Wind 55 mph Union County NWS severe weather mention
- Wind 55 mph Union County NWS severe weather mention
Saturday, March 14, 2026
3 NWS warnings — wind gusts up to 65 mph
“...BLIZZARD CONDITIONS SUNDAY INTO MONDAY MORNING... .A significant winter storm will impact parts of the Upper Midwest this weekend, mainly from Sunday through Monday morning. Widespread snow will fall across Iowa with higher amounts of 6+ inches possible north and east. Winds will gust 55-65+ mph, resulting in significant drifting of snow and visibility reductions.”
“WHAT...North winds 35 to 45 mph with gusts up to 60 mph expected. WHERE...Portions of northwest and west central Iowa, northeast Nebraska, and southeast South Dakota. WHEN...From 10 AM Sunday to 1 AM CDT Monday. IMPACTS...Damaging winds will blow down tree branches. Scattered power outages are expected. Travel will be difficult, especially for high profile vehicles.”
- Wind 65 mph Union County NWS severe weather mention
- Wind 60 mph Union County NWS severe weather mention
- Wind 60 mph Union County NWS severe weather mention
Friday, March 13, 2026
1 NWS warning — wind gusts up to 65 mph
“WHAT...Northwest winds 30 to 40 mph with gusts up to 65 mph. WHERE...Portions of northwest and west central Iowa, northeast Nebraska, and southeast South Dakota. WHEN...Until 7 AM CDT this morning. IMPACTS...Damaging winds will blow down tree branches. Scattered power outages are expected. Travel will be difficult, especially for high profile vehicles.”
- Wind 65 mph Union County NWS severe weather mention
Thursday, March 12, 2026
3 NWS warnings — wind gusts up to 70 mph
“WHAT...Northwest winds 30 to 40 mph with gusts up to 70 mph expected. WHERE...Portions of northwest and west central Iowa, northeast Nebraska, and southeast South Dakota. WHEN...From 9 PM this evening to 7 AM CDT Friday. IMPACTS...Damaging winds will blow down tree branches. Scattered power outages are expected. Travel will be difficult, especially for high profile vehicles.”
“WHAT...Northwest winds 25 to 35 mph with gusts up to 65 mph expected. WHERE...Portions of northwest and west central Iowa, northeast Nebraska, and southeast South Dakota. WHEN...From 9 PM this evening to 7 AM CDT Friday. IMPACTS...Damaging winds will blow down tree branches. Scattered power outages are expected. Travel will be difficult, especially for high profile vehicles.”
- Wind 70 mph Union County NWS severe weather mention
- Wind 65 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
Wednesday, March 11, 2026
7 NWS warnings — wind gusts up to 70 mph
“WHAT...Northwest winds 30 to 40 mph with gusts up to 70 mph expected. WHERE...Portions of northwest and west central Iowa, northeast Nebraska, and southeast South Dakota. WHEN...From 9 PM Thursday to 7 AM CDT Friday. IMPACTS...Damaging winds will blow down tree branches. Scattered power outages are expected. Travel will be difficult, especially for high profile vehicles.”
“AFFECTED AREA...In Iowa, Lyon, Osceola, Dickinson, Sioux, O'Brien, Clay, Plymouth, Cherokee, Buena Vista, Woodbury and Ida. In Nebraska, Dixon and Dakota. In South Dakota, Beadle, Gregory, Jerauld, Sanborn, Miner, Lake, Brule, Aurora, Davison, Hanson, McCook, Minnehaha, Charles Mix, Douglas, Hutchinson, Turner, Lincoln, Bon Homme, Yankton, Clay and Union.”
- Wind 70 mph Union County NWS severe weather mention
- Wind 65 mph Union County NWS severe weather mention
- Wind 55 mph Union County NWS severe weather mention
- Wind 55 mph Union County NWS severe weather mention
- Wind 55 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
Friday, February 27, 2026
1 NWS warning — wind gusts up to 50 mph
“AFFECTED AREA...In Iowa, Lyon, Sioux, O'Brien, Plymouth, Cherokee, Buena Vista, Woodbury and Ida. In Nebraska, Dixon and Dakota. In South Dakota, Gregory, Jerauld, Sanborn, Brule, Aurora, Davison, Hanson, McCook, Minnehaha, Charles Mix, Douglas, Hutchinson, Turner, Lincoln, Bon Homme, Yankton, Clay and Union. WINDS...Northwest 20 to 30 mph with gusts up to 50 mph.”
- Wind 50 mph Union County NWS severe weather mention
Wednesday, February 18, 2026
6 NWS warnings — wind gusts up to 55 mph
“AFFECTED AREA...In Iowa, Lyon, Osceola, Dickinson, Sioux, O'Brien, Clay, Plymouth, Cherokee, Buena Vista, Woodbury and Ida. In Minnesota, Nobles, Jackson and Rock. In Nebraska, Dixon and Dakota. In South Dakota, Gregory, Brule, Aurora, Davison, Hanson, McCook, Minnehaha, Charles Mix, Douglas, Hutchinson, Turner, Lincoln, Bon Homme, Yankton, Clay and Union.”
“...Critical Fire Weather Conditions Continue This Afternoon... .Strong and gusty west winds combined with very low relative humidity and cured fuels are resulting in conditions conducive for rapid fire growth. AFFECTED AREA...All of central Iowa. WIND...West wind 25 to 35 mph with gusts up to 50 mph. HUMIDITY...Minimum relative humidity values of 15 to 25%.”
- Wind 55 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
Tuesday, February 17, 2026
4 NWS warnings — wind gusts up to 50 mph
“The National Weather Service in Sioux Falls has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 10 AM to 6 PM CST Wednesday. The Fire Weather Watch is no longer in effect. AFFECTED AREA...In Iowa, Lyon, Osceola, Dickinson, Sioux, O'Brien, Clay, Plymouth, Cherokee, Buena Vista, Woodbury and Ida. In Minnesota, Nobles, Jackson and Rock.”
“...Critical Fire Weather Conditions are Expected Wednesday... .Strong and gusty west wind combined with very low relative humidity and cured fuels will lead to conditions conducive for very fast fire growth. The National Weather Service in Des Moines has issued a Red Flag Warning, which is in effect from 10 AM to 7 PM CST Wednesday. The Fire Weather Watch is no longer in effect.”
- Wind 50 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
- Wind 50 mph Union County NWS severe weather mention
Saturday, January 17, 2026
2 NWS warnings — wind gusts up to 55 mph
“WHAT...Snow expected. Total snow accumulations up to one inch but locally higher in very narrow snow bands. Winds gusting 40 to 55 mph. WHERE...Portions of northwest and west central Iowa, southwest Minnesota, northeast Nebraska, and central, east central, south central, and southeast South Dakota. WHEN...From 3 AM to 9 PM CST Sunday. IMPACTS...Plan on slippery road conditions.”
“WHAT...Snow expected. Total snow accumulations up to one inch but locally higher in very narrow snow bands. Winds gusting as high as 40 to 55 mph. WHERE...Portions of northwest and west central Iowa, southwest Minnesota, northeast Nebraska, and central, east central, south central, and southeast South Dakota. WHEN...From 3 AM to 9 PM CST Sunday. IMPACTS...Plan on slippery road conditions.”
- Wind 55 mph Union County NWS severe weather mention
- Wind 55 mph Union County NWS severe weather mention
Friday, January 16, 2026
4 NWS warnings — wind gusts up to 60 mph
“WHAT...Snow and areas of blowing snow. Additional snow accumulations up to a half inch, but locally higher in very narrow snow bands. Winds gusting as high as 40 to 60 mph. WHERE...Portions of northwest and west central Iowa, southwest Minnesota, northeast Nebraska, and central, east central, south central, and southeast South Dakota. WHEN...Until midnight CST tonight.”
“WHAT...Snow and areas of blowing snow. Additional snow accumulations up to a half inch, but locally higher in very narrow snow bands. Winds gusting as high as 40 to 60 mph. WHERE...Portions of northwest and west central Iowa, southwest Minnesota, northeast Nebraska, and central, east central, south central, and southeast South Dakota. WHEN...Until 6 PM CST this evening.”
- Wind 60 mph Union County NWS severe weather mention
- Wind 60 mph Union County NWS severe weather mention
- Wind 60 mph Union County NWS severe weather mention
- Wind 60 mph Union County NWS severe weather mention
Today's severe weather outlook
Common questions
When was the last severe storm in Union County, IA?
The most recent recorded event was in August 2026. Official NWS and SPC records show 63 severe weather events in Union 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 Union County recently?
Yes — 3 hail reports in the last 12 months, with hail up to 1" 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.