Jefferson County Storm Activity
Wind, hail, and tornado activity from official NOAA sources (NWS & SPC) · Last 12 months · Updated Sep 12, 2026
Has it hailed in Jefferson County, Wisconsin recently? Official National Weather Service (NWS) and Storm Prediction Center (SPC) records say yes: 16 hail reports with hail up to 2.75", among 45 severe weather events logged here in the last 12 months, together with 29 high-wind reports with gusts up to 85 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.
What the radar showed
Last 30 days in Jefferson 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.
Sunday, August 9, 2026
1 NWS warning — wind gusts up to 50 mph
“At 1003 AM CDT, Doppler radar was tracking a cluster of strong thunderstorms along a line extending from near Fall River to near Brooklyn. Movement was east 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 Jefferson County NWS severe weather mention
Monday, July 27, 2026
1 SPC verified storm report · 2 NWS warnings — hail up to 1.25"
“At 1006 AM CDT, Doppler radar was tracking strong thunderstorms along a line extending from Waupun to near Lac La Belle. Movement was east at 35 mph. Hazard: Wind gusts up to 40 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...”
“At 954 AM CDT, Doppler radar was tracking strong thunderstorms along a line extending from 6 miles north of Watertown to near Jefferson. Movement was east at 30 mph. Hazard: Wind gusts up to 40 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 1.25" 1 SW Lac La Belle SPC verified report
- Hail 0.75" Jefferson County NWS severe weather mention
- Hail 0.75" Jefferson County NWS severe weather mention
Thursday, July 2, 2026
1 NWS warning — wind gusts up to 50 mph
“At 557 PM CDT, Doppler radar was tracking strong thunderstorms along a line extending from near Waterloo to Brooklyn. Movement was east at 35 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 Jefferson County NWS severe weather mention
Sunday, June 28, 2026
1 NWS warning — wind gusts up to 50 mph
“Winds of 40 to 50 mph will be possible this afternoon as rain comes to an end across southern Wisconsin. This appears to be a wake low situation where winds can be gusty for up to an hour after the rain comes to an end. Platteville and other weather stations in southwest Wisconsin have gusted to 47 mph already.”
- Wind 50 mph Jefferson County NWS severe weather mention
Thursday, June 11, 2026
1 NWS warning — wind gusts up to 50 mph
“At 1137 AM CDT, Doppler radar was tracking strong thunderstorms along a line extending from near Stoughton to near Candlewick Lake. Movement was northeast at 55 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 Jefferson County NWS severe weather mention
Wednesday, June 10, 2026
2 SPC verified storm reports — wind gusts up to 85 mph
“Trained spotter estimates 85 MPH wind gusts. (MKX)”
- Wind 85 mph 6 SE Rockdale SPC verified report
- Wind 60 mph 3 SW Watertown SPC verified report
Friday, June 5, 2026
1 NWS warning — hail up to 0.25"
“At 1157 PM CDT, Doppler radar was tracking a cluster of strong thunderstorms along a line extending from Muskego to near Whitewater. Movement was east at 35 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...”
- Hail 0.25" Jefferson County NWS severe weather mention
Monday, May 18, 2026
2 NWS warnings — hail up to 0.5"
“At 610 AM CDT, Doppler radar was tracking a strong thunderstorm near Palmyra, or near East Troy, moving northeast at 55 mph. Hazard: Wind gusts up to 40 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...”
“At 538 AM CDT, Doppler radar was tracking a strong thunderstorm 8 miles northwest of Watertown, moving northeast at 55 mph. Hazard: Wind gusts up to 40 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...”
- Hail 0.5" Jefferson County NWS severe weather mention
- Hail 0.5" Jefferson County NWS severe weather mention
Monday, April 27, 2026
2 NWS warnings — wind gusts up to 50 mph
“At 1241 PM CDT, surface weather stations reported gusty winds behind rain showers / weak thunderstorms. Movement of the line of showers was east at 55 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 1206 PM CDT, surface weather stations traked gusty winds behind rain showers / weak thunderstorms. Movement of the line of showers was east at 55 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 Jefferson County NWS severe weather mention
- Wind 50 mph Jefferson County NWS severe weather mention
Tuesday, April 21, 2026
1 NWS warning — hail up to 0.88"
“At 1129 AM CDT, Doppler radar was tracking a strong thunderstorm near Ottawa, or 8 miles southwest of Wales, moving east at 50 mph. Hazard: Wind gusts up to 40 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" Jefferson County NWS severe weather mention
Friday, April 17, 2026
1 SPC verified storm report — hail up to 1"
- Hail 1" Watertown SPC verified report
Tuesday, April 14, 2026
4 SPC verified storm reports · 2 NWS warnings — hail up to 2.75", wind gusts up to 50 mph
“Report from mPING: Ping Pong Ball (1.50 in.). (MKX)”
“At 126 AM CDT, Doppler radar was tracking strong wind gusts persisting across the area. While the line of storms has exited to the east, these wind gusts will continue for the next 30 minutes. Hazard: Wind gusts up to 50 mph. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include...”
- Hail 2.75" 2 SE Watertown SPC verified report
- Hail 1.75" Watertown SPC verified report
- Hail 1.5" 4 NW Lake Mills SPC verified report
- Wind 50 mph Jefferson County NWS severe weather mention
- Wind 50 mph Jefferson County NWS severe weather mention
- Hail 1" Waterloo SPC verified report
Monday, April 13, 2026
3 SPC verified storm reports — wind gusts up to 70 mph
“Trained spotter estimates 70 MPH winds. (MKX)”
“A roof removed from a home on Jackson Street in Jefferson. Some tree damage in the city. (MKX)”
- Wind 70 mph 3 SE Rockdale SPC verified report
- Wind 60 mph 4 SSE Sullivan SPC verified report
- Wind Unknown 1 NW Jefferson SPC verified report
Wednesday, April 8, 2026
1 NWS warning — wind gusts up to 50 mph
“At 515 PM CDT, Doppler radar was tracking gusty showers along a line extending from 10 miles east of Fremont to near Poynette to near Darlington. Movement was northeast at 50 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 Jefferson County NWS severe weather mention
Friday, April 3, 2026
1 NWS warning — hail up to 0.75"
“At 914 PM CDT, Doppler radar was tracking strong thunderstorms along a line extending from near Lake Koshkonong to 6 miles east of Milton to near Delavan to near Elkhorn. Movement was northeast at 40 mph. Hazard: Penny size hail. Impact: Minor hail damage to vegetation is possible. Locations impacted include...”
- Hail 0.75" Jefferson County NWS severe weather mention
Thursday, April 2, 2026
1 SPC verified storm report
“Jefferson County Dispatch reports tree down on Power Line north of Palmyra. (MKX)”
- Wind Unknown 2 WNW Palmyra SPC verified report
Tuesday, March 31, 2026
2 NWS warnings — hail up to 0.5"
“At 119 PM CDT, Doppler radar was tracking strong thunderstorms along a line extending from 6 miles north of Lac La Belle to near Lake Koshkonong to near Edgerton. Movement was east at 35 mph. Hazard: Half inch hail. Impact: Minor hail damage to vegetation is possible. Locations impacted include...”
“At 1239 PM CDT, Doppler radar was tracking strong thunderstorms along a line extending from near Waunakee to Council Hill. Movement was east at 50 mph. Hazard: Wind gusts up to 40 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...”
- Hail 0.5" Jefferson County NWS severe weather mention
- Hail 0.5" Jefferson County NWS severe weather mention
Friday, March 13, 2026
1 NWS warning — wind gusts up to 60 mph
“WHAT...West winds 25 to 35 mph with gusts up to 60 mph. WHERE...Portions of east central, south central, and southeast Wisconsin. WHEN...Until 4 PM CDT this afternoon. IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.”
- Wind 60 mph Jefferson County NWS severe weather mention
Thursday, March 12, 2026
4 NWS warnings — wind gusts up to 60 mph
“WHAT...Initially, south winds 20 to 30 mph with gusts up to 60 mph expected, particularly within precipitation. Then, west winds 20 to 30 mph with gusts up to 60 mph expected. WHERE...Portions of east central, south central, and southeast Wisconsin. WHEN...Until 4 PM CDT Friday. IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected.”
“WHAT...Initially, south winds 20 to 30 mph with gusts up to 60 mph expected, particularly within precipitation. Then, west winds 20 to 30 mph with gusts up to 60 mph expected. WHERE...Portions of east central, south central, and southeast Wisconsin. WHEN...10 PM Tonight Until 4 PM CDT Friday. IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected.”
- Wind 60 mph Jefferson County NWS severe weather mention
- Wind 60 mph Jefferson County NWS severe weather mention
- Wind 60 mph Jefferson County NWS severe weather mention
- Wind 50 mph Jefferson County NWS severe weather mention
Wednesday, March 11, 2026
1 NWS warning — wind gusts up to 50 mph
“WHAT...Overnight southerly winds 25 to 30 mph gusting up to 50 mph. Then, during the day Friday, west winds 25 to 35 mph with gusts up to 50 mph expected. WHERE...Portions of east central, south central, and southeast Wisconsin. WHEN...From midnight Thursday Night to 6 PM CDT Friday. IMPACTS...Gusty winds will blow around unsecured objects.”
- Wind 50 mph Jefferson County NWS severe weather mention
Monday, December 29, 2025
1 NWS warning — wind gusts up to 55 mph
“WHAT...Northwest winds 20 to 30 mph with gusts up to 50 mph. A few gusts to 55 mph possible near Lake Michigan. WHERE...Portions of east central and southeast Wisconsin. 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.”
- Wind 55 mph Jefferson County NWS severe weather mention
Sunday, December 28, 2025
3 NWS warnings — wind gusts up to 55 mph
“WHAT...Northwest winds 20 to 30 MPH with gusts up to 50 MPH. A few gusts to 55 MPH possible near Lake Michigan. WHERE...Portions of east central and southeast Wisconsin. WHEN...Until 6 PM CST Monday. 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. A few gusts to 55 mph may occur along the Lake Michigan shoreline. WHERE...Portions of east central, south central, and southeast Wisconsin. WHEN...From 6 PM this evening to 6 PM CST Monday. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
- Wind 55 mph Jefferson County NWS severe weather mention
- Wind 55 mph Jefferson County NWS severe weather mention
- Wind 50 mph Jefferson County NWS severe weather mention
Saturday, December 27, 2025
1 NWS warning — wind gusts up to 55 mph
“WHAT...Northwest winds 20 to 30 mph with gusts up to 50 mph expected. A few gusts to 55 mph may occur along the Lake Michigan shoreline. WHERE...Portions of east central, south central, and southeast Wisconsin. WHEN...From 6 PM Sunday to 6 PM CST Monday. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
- Wind 55 mph Jefferson County NWS severe weather mention
Sunday, September 21, 2025
1 SPC verified storm report
“Law enforcement reports several trees down near Ixonia WI. (MKX)”
- Wind Unknown Ixonia SPC verified report
Today's severe weather outlook
Common questions
When was the last severe storm in Jefferson County, WI?
The most recent recorded event was in September 2026. Official NWS and SPC records show 45 severe weather events in Jefferson 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 Jefferson County recently?
Yes — 16 hail reports in the last 12 months, with hail up to 2.75" 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.