Significant and/or interesting weather events in Wisconsin Weather History. Click a storm to see the storm timeline and description.


2018 Wisconsin Statistics: 48 events, 5,916 storm reports
Monday Snow
Sun Nov 18, 2018
2-5" of Snow Friday Night in SW Wisconsin
Thu Nov 15, 2018
First Snow of the 2018-2019 Winter
Winter Storm
Thu Nov 8, 2018
Early November Weekend Storm
Winter Storm
Sat Nov 3, 2018
Wind Driven Snow Squalls
Snow Squalls
Fri Oct 19, 2018
Long Duration Rain Event Lasting Through Wednesday
Heavy Rain
Mon Oct 8, 2018
Mattoon EF0 Tornado - October Severe Weather Event
Severe Thunderstorms
Tue Oct 2, 2018
Severe Thunderstorms
Wed Sep 19, 2018
Heavy Rain
Tue Sep 18, 2018
Central Wisconsin Strong T-Storms
Severe Thunderstorms
Sun Sep 16, 2018
Heavy Rain
Mon Sep 3, 2018

Green Lake Marquette County Tornado Outbreak
Severe Thunderstorms
Mon Aug 27, 2018

Severe Thunderstorms
Sun Aug 26, 2018

Heavy Rain and Severe Weather
Severe Thunderstorms
Sat Aug 25, 2018
15.33" of Heavy Rain in Cross Plains, WI
Heavy Rain
Sun Aug 19, 2018

Flood Warning in Watertown, WI
Heavy Rain
Thu Aug 16, 2018
Thunderstorms in Northern Wisconsin Tonight
Severe Thunderstorms
Tue Aug 7, 2018
Severe T-storms in Northern Wisconsin
Severe Thunderstorms
Sat Aug 4, 2018
Wednesday Night Storms
Severe Thunderstorms
Tue Jul 24, 2018
T-Storm Redevelopment
Severe Thunderstorms
Thu Jul 12, 2018
Thursday Night Storms
Severe Thunderstorms
Wed Jul 11, 2018
Excessive Heat
Extreme Heat
Thu Jun 28, 2018

Tornadoes in Southern WI
Severe Thunderstorms
Mon Jun 25, 2018
Heavy Flooding Rain, Heat, and Severe Weather
Heavy Rain
Fri Jun 15, 2018

Strong T-storms Possible Overnight
Severe Thunderstorms
Mon Jun 11, 2018
Tropical Storm Alberto Remnants
Heavy Rain
Tue May 29, 2018
Memorial Day Weekend Heat
Extreme Heat
Sat May 26, 2018
Northwest WI Hailstorms
Severe Thunderstorms
Thu May 24, 2018
Southern Wisconsin Tornadoes
Severe Thunderstorms
Tue May 8, 2018
4.8" in Richland Center - Heavy Rain
Heavy Rain
Wed May 2, 2018
Severe Storms in Southeast Wisconsin
Severe Thunderstorms
Tue May 1, 2018
Strong T-storms Possible Tonight
Severe Thunderstorms
Mon Apr 30, 2018
Winter Storm Warning
Winter Storm
Tue Apr 17, 2018
Historic Blizzard of 2018
Fri Apr 13, 2018

Early April Snowstorm - 6-12" Central Wisconsin
Winter Storm
Mon Apr 2, 2018

Late March Snowstorm
Winter Storm
Fri Mar 30, 2018

Southwest Wisconsin Snow
Winter Storm
Wed Mar 21, 2018
March Winter Storm
Winter Storm
Sun Mar 4, 2018

Weekend Winter Storm
Winter Storm
Fri Feb 23, 2018

Wintry Mix - 7.8" Snow in Hayward
Winter Storm
Thu Feb 22, 2018
Winter Ice Storm
Winter Storm
Sun Feb 18, 2018

Southern Wisconsin Snow
Winter Storm
Thu Feb 8, 2018

Snow Squalls
Sun Feb 4, 2018
Wisconsin Snow - 8" in Milwaukee
Fri Feb 2, 2018

Wisconsin Snow Storm - 14" in Prescott
Sun Jan 21, 2018

25" Lake Effect Snow in Door County
Sun Jan 14, 2018

Winter Storm Northwest Wisconsin
Wed Jan 10, 2018

Extreme Cold
Sun Dec 31, 2017


2017 Wisconsin Statistics: 6 events, 656 storm reports
10" in Sturgeon Bay Wisconsin
Tue Dec 12, 2017

Tornado Outbreak Eastern Wisconsin
Tornado Outbreak
Tue Jun 13, 2017

Campbellsport, WI EF-0 Tornado
Severe Thunderstorms
Sun Jun 11, 2017

Progressive Derecho Northern Wisconsin
Severe Thunderstorms
Fri Jun 9, 2017

Chetek Tornado Day
Tornado Outbreak
Mon May 15, 2017

Gile, WI Foot of Snow
Thu Feb 23, 2017


2013 Wisconsin Statistics: 1 events, 84 storm reports
Tornado Outbreak
Tornado Outbreak
Tue Aug 6, 2013


2011 Wisconsin Statistics: 3 events, 689 storm reports
April 10 2011 Tornado Outbreak
Tornado Outbreak
Sat Apr 9, 2011

March Snowstorm - Broadcast Tower Collapse
Tue Mar 22, 2011

Feb 1-2, 2011 Blizzard
Tue Feb 1, 2011


2007 Wisconsin Statistics: 1 events, 0 storm reports
June 7 2007 Tornado Outbreak
Tornado Outbreak
Wed Jun 6, 2007

What are storm events?
a collection of photography, forecasts, blog posts, storm reports, and maps between a start and end date. Each storm event is given an impact rating, primary hazard, and short write up.
What is the difference between start, end, and key date?
Each storm is given a start, end, and key date. The key date is the date commonly associated with the event usually corresponding to the heaviest impact. For example a violent tornado or major blizzard. In otherwords the key date is what we often remember events by. The start and end refer to when the encompassing event occurred.
How are storm events used as tools?
Through analog time periods that contains one of the storm events. It is common practice to compare a future storm to one that has already happened.
How do you do that?
We store storm event information (records) in our database along with storm reports, blog posts, imported photography, forecasts, etc and we pull the information when the page is loaded.
Where else are storm events used on the website?
When a storm event reaches it's start date, a banner is displayed at the top of every page. When clicked you will either go to a predetermined link or the storm event page. From there you can click through to other areas of the website. Storm events have multiple uses.
What is the future goal of storm events?
To pull together a CIPS like analog service that aids in forecasting. We are exploring the possiblity of merging storm events with outlooks for a hybrid forecast format. We want to measure how storm impact changes over time.
Why not just use NWS storm summaries?
We do backfill historical events with NWS storm write ups. After 2017 we record storm events at a higher resolution (not just the big or notable ones) and use them as a tool. Storm events are often split across multiple NWS CWAs but our system is a single source. The event page is pre-existing and evolves in realtime as the storm unfolds. More depth of information.
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