San Gabriel River near Weir, TX, TX
River level and flood forecast · Williamson County
Normal6.7 ftas of Mon 3:15 PM
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 6 PM. Forecasts change as rain falls and as upstream water arrives.
What floods at each level
From the National Weather Service, highest first.
- 19 ftAt 19ft floodwaters begin to impact downstream RV park properties.
- 8 ftAt 8ft water has begun to flood Mankins Crossing Bridge.
Highest crests on record
- 29.48 ft — July 5, 2025
- 23.23 ft — February 3, 1986
- 21.85 ft — September 3, 1981
- 19.92 ft — June 4, 1987
- 18.07 ft — February 23, 1985
Recent crests: 15.72 ft (May 20, 2026) · 13.73 ft (April 21, 2026) · 29.48 ft (July 5, 2025) · 9.27 ft (May 3, 1990) · 13.28 ft (May 17, 1989)
Up and down the river, and nearby
- UpstreamSan Gabriel River at Georgetown South Fork, TX
- Berry Creek near Georgetown, TX
- North Fork of the San Gabriel River near Georgetown, TX
- Brushy Creek at Kenney Fort Blvd nr Round Rock, TX
- Willis Creek near Granger, TX
- Brushy Creek at I-35 Round Rock, TX
- Brushy Creek at Cedar Park, TX
- Brushy Creek at FM 973 nr Coupland, TX
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (WSGT2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.