Flash Flood Warning Issued for Williamson County, Texas
This alert is no longer in effect.
NOAA issued it on April 28, 2026, 3 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 Williamson County, Texas, until 10:15 AM CDT on April 21, 2026, due to heavy rainfall causing life-threatening flooding.
Read this weather record in 30 seconds
- Record type
- Flash Flood Warning
- Affected area
- Williamson County, Texas
- Issued
- April 28, 2026
- Issuing authority
- NWS Austin/San Antonio TX
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 3 months ago; use the issuing agency's live warning service for current conditions in Williamson County, Texas.
Flash Flood Warning in Williamson County, Texas
Alert Details
The National Weather Service in Austin/San Antonio has issued a Flash Flood Warning. It is effective from 7:06 AM CDT until 10:15 AM CDT on April 21, 2026.
Affected Areas
The warning affects central Williamson County in south central Texas, including locations such as Round Rock, Georgetown, Taylor, Serenada, Leander, Hutto, Liberty Hill, Jarrell, Florence, Thrall, Weir, Georgetown Dam, Sun City, Andice, Coupland, Jonah, Walburg, Theon, Waterloo, and Seward Junction.
What You Should Do
Turn around, don't drown when encountering flooded roads. Be especially cautious at night, do not drive on flooded roads, and avoid attempting to cross low water crossings. Report observed flooding to local emergency services or law enforcement.
Expected Conditions
Thunderstorms are producing heavy rain, with 1 to 3 inches already fallen and additional 1 to 3 inches possible. This will lead to life-threatening flash flooding of creeks, streams, urban areas, highways, streets, and underpasses.
Timeline
The alert is effective from 7:06 AM CDT on April 21, 2026, and expires at 10:15 AM 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 (1,185 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to April 28, 2026.
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