RIVER GAUGE · BIG THOMPSON RIVER (CO)
Big Thompson River (CO) near La Salle
Weld County, Colorado
Water level1.10 ft
Flow15 cfs
Last readingSep 16, 2026, 4:30 PM UTC (last recorded)
Action7 ft
Minor flood8 ft
Moderate flood9.5 ft
Major flood11 ft
The past week
Loading chart…
What floods at each level
- 10 ft
Major flooding occurs along the reach.
- 9.5 ft
Moderate flooding occurs along the reach, mostly of agricultural lands.
- 8 ft
Farm and ranch lands flood. Minor flooding in Milliken.
- 7 ft
The river is out of its banks and into fields and meadows.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| May 1, 1980 | 9.91 ft | 6,220 cfs |
| Apr 30, 1999 | 9.54 ft | 5,755 cfs |
| May 30, 1995 | 9.47 ft | 6,706 cfs |
More on Big Thompson River (CO)
DownstreamSouth Platte River near Kersey
Get an alert when Big Thompson River (CO) rises
Save this gauge in the free StormCast app and pick the level that matters to you. Your phone goes off when the water gets there.
