Flash Flood Warning Issued for Southern Wisconsin Counties
This alert is no longer in effect.
NOAA issued it on April 16, 2026, 4 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
A Flash Flood Warning is in effect for Dane, Green, Jefferson, Lafayette, Rock, and Walworth counties in Wisconsin until 10:30 PM CDT, with heavy rain expected to cause flooding in affected areas.
Read this weather record in 30 seconds
- Record type
- Flash Flood Warning
- Affected area
- South Central Wisconsin
- Issued
- April 16, 2026
- Issuing authority
- NWS Milwaukee Sullivan
Flood notices turn on location and timing. Treat the named area as this record's scope; do not assume nearby counties, parishes, or waterways were included.
Record status: historical. It was issued 4 months ago; use the issuing agency's live warning service for current conditions in South Central Wisconsin.
Flash Flood Warning in Wisconsin
Alert Details
A Flash Flood Warning has been issued by the National Weather Service in Milwaukee/Sullivan WI. It is effective from 7:26 PM CDT until 10:30 PM CDT on April 15, 2026.
Affected Areas
The warning affects Dane, WI; Green, WI; Jefferson, WI; Lafayette, WI; Rock, WI; and Walworth, WI. Specific locations include Eastern Madison, Janesville, Fitchburg, Whitewater, Stoughton, Fort Atkinson, Monroe, Verona, Oregon, Jefferson, McFarland, Monona, Lake Mills, Milton, Edgerton, Evansville, Marshall, Waterloo, Brodhead, and Darlington.
What You Should Do
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Expected Conditions
Thunderstorms are producing heavy rain, with up to 0.75 inches already fallen and additional rainfall amounts of 1 to 2 inches possible. This will cause flash flooding of small creeks and streams, urban areas, highways, streets, underpasses, and other poor drainage and low-lying areas.
Timeline
The alert is effective from 7:26 PM CDT on April 15, 2026, and ends at 10:30 PM CDT on the same day.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,127 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to April 16, 2026.
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Common questions about this NWS weather alert.