Decatur County Storm Activity
Wind, hail, and tornado activity from official NOAA sources (NWS & SPC) · Last 12 months · Updated Sep 11, 2026
Decatur County, Iowa has recorded tornado activity: official National Weather Service (NWS) and Storm Prediction Center (SPC) records list 2 tornado reports among 19 severe weather events here in the last 12 months, alongside 1 hail report with hail up to 0.25" and 16 high-wind reports with gusts up to 71 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 Decatur 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 10, 2026
1 NWS warning — hail up to 0.25"
“At 435 AM CDT, Doppler radar was tracking a strong thunderstorm near Lamoni, or 11 miles southwest of Leon, moving east at 35 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...”
- Hail 0.25" Decatur County NWS severe weather mention
Tuesday, August 4, 2026
2 SPC verified storm reports — wind gusts up to 58 mph
“Delayed report. Picture of a large tree down in Lamoni. (DMX)”
- Wind 58 mph 2 ENE Lamoni SPC verified report
- Wind Unknown Lamoni SPC verified report
Thursday, June 11, 2026
1 SPC verified storm report — wind gusts up to 62 mph
“Delayed entry - measured from KLWD. (DMX)”
- Wind 62 mph 2 ENE Lamoni SPC verified report
Wednesday, June 10, 2026
2 SPC verified storm reports — 1 tornado report
“Local fire chief reports several intermittent touchdowns. (DMX)”
- Tornado Tornado 3 SSE Garden Grove SPC verified report
- Wind Unknown Garden Grove 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 Decatur County NWS severe weather mention
Wednesday, April 22, 2026
3 SPC verified storm reports — wind gusts up to 70 mph, 1 tornado report
“Tree on house with power lines down. (DMX)”
“Tree limbs down and out building damage. (DMX)”
- Tornado Tornado Weldon SPC verified report
- Wind 70 mph 2 ENE Lamoni SPC verified report
- Wind Unknown 4 ENE Leon SPC verified report
Sunday, March 15, 2026
3 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 Decatur County NWS severe weather mention
- Wind 65 mph Decatur County NWS severe weather mention
- Wind 55 mph Decatur County NWS severe weather mention
Saturday, March 14, 2026
1 NWS warning — 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.”
- Wind 65 mph Decatur County NWS severe weather mention
Wednesday, February 18, 2026
1 NWS warning — wind gusts up to 50 mph
“...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 50 mph Decatur County NWS severe weather mention
Tuesday, February 17, 2026
1 NWS warning — wind gusts up to 50 mph
“...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 Decatur County NWS severe weather mention
Wednesday, September 17, 2025
2 SPC verified storm reports — wind gusts up to 71 mph
“Delayed report. Several large trees down in central sections of Lamoni. (DMX)”
- Wind 71 mph 2 ENE Lamoni SPC verified report
- Wind Unknown Lamoni SPC verified report
Today's severe weather outlook
Common questions
When was the last severe storm in Decatur County, IA?
The most recent recorded event was in August 2026. Official NWS and SPC records show 19 severe weather events in Decatur 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 Decatur County recently?
Yes — 1 hail report in the last 12 months, with hail up to 0.25" 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.