Sister Grove Creek near Blue Ridge, TX
River level and flood forecast · Collin County
Normal11.5 ftas of Mon 3 PM
The river is 12.5 ft below flood stage (24 ft).
Flow: 1 cubic feet per second (USGS).
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.
Flood stages
| Major flood stage | 31 ft |
| Moderate flood stage | 27 ft |
| Flood stage | 24 ft |
| Action stage | 22 ft |
| Record crest (May 13, 1982) | 32.5 ft |
What floods at each level
From the National Weather Service, highest first.
- 31 ftMajor out of bank flooding is expected. Farm and ranch land near the creek will be underwater. Rural roads near the creek will be flooded.
- 27 ftModerate out of banks flooding can be expected. Farm and ranch interests near the creek will be moderately flooded.
- 24 ftMinor out of bank flooding along the creek is expected. Rural roads, along with farm and ranch land near the creek, will begin to flood.
Highest crests on record
- 32.5 ft — May 13, 1982
- 28.54 ft — May 10, 2015
- 28 ft — October 1, 1974
- 27.84 ft — November 27, 2015
- 27.81 ft — June 6, 2024
Recent crests: 26.07 ft (June 15, 2026) · 24.47 ft (April 5, 2026) · 24.09 ft (June 9, 2025) · 25.26 ft (May 1, 2025) · 27.81 ft (June 6, 2024)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (BVWT2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.