Flash Flood Warning Issued for Rock County, Wisconsin
This alert is no longer in effect.
NOAA issued it on April 25, 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 Rock County in south central Wisconsin until 9:45 PM CDT, with heavy rain leading to life-threatening flooding in areas including Janesville and Milton.
Read this weather record in 30 seconds
- Record type
- Flash Flood Warning
- Affected area
- Rock County, Wisconsin
- Issued
- April 25, 2026
- Issuing authority
- NWS Milwaukee/Sullivan WI
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 Rock County, Wisconsin.
Flash Flood Warning in Rock County, Wisconsin
Alert Details
A Flash Flood Warning has been issued by the National Weather Service in Milwaukee/Sullivan WI. It is effective immediately and is categorized as a severe alert.
Affected Areas
The warning affects central Rock County in south central Wisconsin, including the locations of Janesville, Milton, Orfordville, Footville, Hanover, and Leyden.
What You Should Do
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Avoid flooded areas.
Expected Conditions
Thunderstorms are producing heavy rain, with between 2 and 3 inches of rain already fallen and additional rainfall amounts of 0.5 to 1.5 inches possible. This is causing life-threatening flash flooding of creeks and streams, urban areas, highways, streets, and underpasses.
Timeline
The alert is effective from 6:34 PM CDT on April 17, 2026, until 9:45 PM CDT on April 17, 2026.
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 (952 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to April 25, 2026.
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Common questions about this NWS weather alert.