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Storm ActivityIowa Storm ActivityWinnebago County, IA
Iowa · Official NOAA Storm Data

Winnebago County Hail Map & Storm Reports

Hail, wind, and tornado reports from official NOAA sources (NWS & SPC) · Last 12 months · Updated Sep 14, 2026

Winnebago County, Iowa has recorded tornado activity: official National Weather Service (NWS) and Storm Prediction Center (SPC) records list 1 tornado report among 43 severe weather events here in the last 12 months, alongside 8 hail reports with hail up to 1.25" and 34 high-wind reports with gusts up to 65 mph. The most recent recorded storm activity was on Aug 7, 2026. This page updates daily: every event comes straight from official NOAA data — no estimates, no modeling, just the record.

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

Winnebago County hail map

Where hail and high-wind reports clustered across Winnebago County over the last 12 months. Heat shows report density and significance, not radar.

43
Events (12 mo)
8
Hail
34
Wind
1
Tornado
1.25"
Max hail
65
Max wind (mph)
Aug 7, 2026
Most recent

What the radar showed

Radar snapshot during the May 16, 2026 tornado event near 4 N Crystal Lake, Winnebago County, Iowa, with NWS warning polygons
NEXRAD radar at the moment of the May 16, 2026 tornado event (Tornado) near 4 N Crystal Lake. 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.

Hail history for an address in Winnebago County

See address-level storm exposure — verified hail and wind reports plus official warning boundaries around any specific property, including the most recent 30 days. Free account, takes under a minute.

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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.

Friday, August 7, 2026

1 SPC verified storm report — hail up to 1"

NEXRAD radar during the Friday, August 7, 2026 storm activity in Winnebago County, Iowa
Radar during the most significant activity of the day. Imagery courtesy of the Iowa Environmental Mesonet, Iowa State University; radar data via NOAA/NWS.

Tuesday, August 4, 2026

2 NWS warnings — wind gusts up to 50 mph

NEXRAD radar during the Tuesday, August 4, 2026 storm activity in Winnebago County, Iowa
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 419 AM CDT, Doppler radar was tracking strong thunderstorms along a line extending from 11 miles northeast of Union Slogh to 9 miles west of Britt to 4 miles northeast of Dakota City. Movement was east at 50 mph. Hazard: Wind gusts up to 50 mph. The Algona Airport recently recorded a 35 mph wind gust with a personal weather station north of Algona recording a 46 mph wind gust.”

NWS severe weather mention · Winnebago County

“At 338 AM CDT, Doppler radar was tracking strong thunderstorms along a line extending from 4 miles northeast of Swan Lake to Emmetsburg to near Laurens. Movement was east at 55 mph. Hazard: Wind gusts up to 50 mph. The Spencer Airport recorded a wind gust of 48 mph at 308 AM and the Estherville Airport recorded a wind gust of 39 mph at 330 AM.”

NWS severe weather mention · Winnebago County

Saturday, July 4, 2026

2 NWS warnings — hail up to 0.25"

NEXRAD radar during the Saturday, July 4, 2026 storm activity in Winnebago County, Iowa
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 1128 PM CDT, Doppler radar was tracking strong thunderstorms along a line extending from 8 miles southwest of Elmore to 11 miles northwest of Forest City to 5 miles southwest of Glenville. Movement was southeast at 15 mph. Hazard: Wind gusts up to around 40 mph and pea size hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects.”

NWS severe weather mention · Winnebago County

“At 1049 PM CDT, Doppler radar was tracking strong thunderstorms along a line extending from near Elmore to near Mansfield. Movement was southeast at 15 mph. Hazard: Wind gusts up to 40 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...”

NWS severe weather mention · Winnebago County

Thursday, July 2, 2026

3 NWS warnings — hail up to 0.88"

NEXRAD radar during the Thursday, July 2, 2026 storm activity in Winnebago County, Iowa
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 747 AM CDT, Doppler radar was tracking a strong thunderstorm near Forest City, moving northeast at 40 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...”

NWS severe weather mention · Winnebago County

“At 1123 AM CDT, Doppler radar was tracking a strong thunderstorm 7 miles south of Britt, or 12 miles southwest of Garner, moving northeast at 50 mph. Hazard: Wind gusts up to 50 mph and penny size hail and additional heavy rainfall of one to two inches. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible.”

NWS severe weather mention · Winnebago County

Saturday, May 16, 2026

2 SPC verified storm reports — wind gusts up to 62 mph, 1 tornado report

NEXRAD radar during the Saturday, May 16, 2026 storm activity in Winnebago County, Iowa
Radar during the most significant activity of the day. Imagery courtesy of the Iowa Environmental Mesonet, Iowa State University; radar data via NOAA/NWS.

“Reports of power line sparking/flashing. (DMX)”

SPC verified report · 4 N Crystal Lake

Sunday, April 12, 2026

1 NWS warning — hail up to 0.5"

NEXRAD radar during the Sunday, April 12, 2026 storm activity in Winnebago County, Iowa
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 155 AM CDT, Doppler radar was tracking a cluster of thunderstorms along a line extending from 9 miles south of Iowa Lake to near Algona to 4 miles northwest of Humboldt. Movement was northeast at 40 mph. Hazard: Half inch hail and additional rainfall up to one inch. Impact: Minor hail damage to vegetation is possible.”

NWS severe weather mention · Winnebago County

Saturday, April 11, 2026

1 SPC verified storm report — hail up to 1.25"

NEXRAD radar during the Saturday, April 11, 2026 storm activity in Winnebago County, Iowa
Radar during the most significant activity of the day. Imagery courtesy of the Iowa Environmental Mesonet, Iowa State University; radar data via NOAA/NWS.

“Picture of hail north of Thompson. Relayed by KIOW radio. (DMX)”

SPC verified report · 1 N Thompson

Sunday, March 15, 2026

6 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.”

NWS severe weather mention · Winnebago County

“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.”

NWS severe weather mention · Winnebago County

Saturday, March 14, 2026

2 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.”

NWS severe weather mention · Winnebago County

“...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.”

NWS severe weather mention · Winnebago County

Friday, March 13, 2026

1 NWS warning — wind gusts up to 65 mph

“WHAT...West to northwest winds 30 to 40 mph with gusts up to around 60 mph expected. Isolated gusts of 60 to 65 mph are possible. WHERE...Central and northern Iowa, including I-35 and I-80. WHEN...Until 7 AM CDT this morning. IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.”

NWS severe weather mention · Winnebago County

Thursday, March 12, 2026

4 NWS warnings — wind gusts up to 65 mph

“WHAT...West to northwest winds 30 to 40 mph with gusts up to around 60 mph expected. Isolated gusts of 60 to 65 mph are possible. WHERE...Central and northern Iowa, including I-35 and I-80. WHEN...Until 7 AM CDT Friday. IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.”

NWS severe weather mention · Winnebago County

“WHAT...West to northwest winds 30 to 35 mph with gusts up to 60 mph expected. WHERE...Central and northern Iowa. WHEN...From 10 PM tonight to 7 AM CDT Friday. IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.”

NWS severe weather mention · Winnebago County

Wednesday, March 11, 2026

2 NWS warnings — wind gusts up to 60 mph

“WHAT...West to northwest winds sustained at 30 to 35 mph with gusts up to 60 mph possible. WHERE...Much of northern Iowa and portions of central Iowa. WHEN...From Thursday night into Friday morning. IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles on north south roads.”

NWS severe weather mention · Winnebago County

“WHAT...West to northwest winds sustained at 25 to 35 mph with gusts up to 60 mph possible. WHERE...Much of northern Iowa and portions of central Iowa. WHEN...From Thursday night into Friday morning. IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles on north south roads.”

NWS severe weather mention · Winnebago County

Wednesday, February 18, 2026

5 NWS warnings — 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%.”

NWS severe weather mention · Winnebago County

“WHAT...West winds 25 to 35 mph with gusts up to 50 mph. WHERE...Portions of northern into central Iowa. WHEN...Until 6 PM CST this evening. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”

NWS severe weather mention · Winnebago County

Tuesday, February 17, 2026

2 NWS warnings — wind gusts up to 50 mph

“WHAT...West winds 25 to 35 mph with gusts up to 50 mph expected. WHERE...Cerro Gordo, Hancock, Kossuth, Winnebago, Worth, Emmet, and Palo Alto Counties. WHEN...From 8 AM to 4 PM CST Wednesday. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”

NWS severe weather mention · Winnebago County

“...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.”

NWS severe weather mention · Winnebago County

Sunday, January 18, 2026

1 NWS warning — wind gusts up to 55 mph

“WHAT...Localized snow showers and blowing snow. Additional snow accumulations of a dusting. Winds gusts of 40 to 50 mph with a few gusts to 55 mph possible. WHERE...Portions of northern into north central Iowa. WHEN...Until midnight CST tonight. IMPACTS...Plan on periods of reduced visibility. Gusty winds could also bring down tree branches.”

NWS severe weather mention · Winnebago County

Friday, January 16, 2026

2 NWS warnings — wind gusts up to 50 mph

“...PERIODS OF SNOW SHOWERS OR SNOW SQUALLS POSSIBLE THROUGH EARLY EVENING... .Snow showers and snow squalls remain possible through early this evening. This activity may bring brief but intense snow rates, which will reduce visibility to a quarter mile or less at times, and quickly cover roads creating hazardous travel conditions.”

NWS severe weather mention · Winnebago County

“...LOCALIZED WHITEOUT CONDITIONS EXPECTED IN SNOW SQUALLS TODAY... .Snow showers and snow squalls will become more widespread this afternoon as a cold front arrives from northwest. This activity will move southeast by the afternoon before diminishing tonight.”

NWS severe weather mention · Winnebago County

Wednesday, December 10, 2025

1 NWS warning — wind gusts up to 60 mph

“...STRONG WINDS RESULTING IN BLOWING SNOW THIS MORNING... .Very strong winds will continue over much of Iowa this morning. Wind gusts of 50 to 60 mph are expected. Strong winds may interact with snowpack on the ground, leading to blowing and drifting of snow. Scattered snow showers in conjunction with the strong winds may lead to brief visibility reductions this morning.”

NWS severe weather mention · Winnebago County

Tuesday, December 9, 2025

4 NWS warnings — wind gusts up to 60 mph

“...STRONG WINDS RESULTING IN BLOWING SNOW TONIGHT THROUGH WEDNESDAY MORNING... .Very strong winds will develop over much of Iowa later tonight and into Wednesday morning. Wind gusts of 50 to 60 mph are expected. Strong winds will interact with snowpack on the ground, leading to blowing and drifting of snow.”

NWS severe weather mention · Winnebago County

“...STRONG WINDS AND BLOWING SNOW WILL OCCUR TONIGHT THROUGH WEDNESDAY MORNING... .Very strong winds will develop this evening and tonight, with the strong wind gusts persisting into Wednesday morning. Wind gusts of 50 to 60 mph are expected. Much of the area has 6 inches or more of snow on the ground.”

NWS severe weather mention · Winnebago County

Monday, December 8, 2025

1 NWS warning — wind gusts up to 60 mph

“...BLIZZARD CONDITIONS MAY OCCUR DUE TO SIGNIFICANT BLOWING SNOW TUESDAY NIGHT AND WEDNESDAY MORNING... .Very strong winds will develop Tuesday evening with the strong wind gusts persisting into Wednesday morning. Wind gusts of 50 to 60 mph are expected. Much of the area has 6 inches or more of snow on the ground.”

NWS severe weather mention · Winnebago County

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 Winnebago County, IA?

The most recent recorded event was on Aug 7, 2026. Official NWS and SPC records show 43 severe weather events in Winnebago 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 Winnebago County recently?

Yes — 8 hail reports in the last 12 months, with hail up to 1.25" 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 Winnebago 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.

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