Connecticut River at Thompsonville, CT
River level and flood forecast · Hartford County
The river is 7.0 ft below flood stage (15 ft).
Forecast to hold near 8.0 ft through Thu, Oct 15, 8 AM.
Flow: 5,090 cubic feet per second (USGS).
Normal for October 13.
Usual for October 13: 4,240 to 10,800 cubic feet per second (the middle half of 98 years).
River camera
Watch the time-lapse
Camera by the U.S. Geological Survey. Most take a picture every hour, some every few minutes; many stop at night.
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 11:14 AM. Forecasts change as rain falls and as upstream water arrives.
Get flood alerts for this river
An email when the National Weather Service forecasts Connecticut River at Thompsonville to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 19 ft |
| Moderate flood stage | 17 ft |
| Flood stage | 15 ft |
| Action stage | 14 ft |
| Record crest (March 20, 1936) | 26.6 ft |
What floods at each level
From the National Weather Service, highest first.
- 18 ftSignificant and widespread flooding along the river can be expected from the Massachusetts towns of Agawam and Longmeadow, through the northern Connecticut towns of Suffield and Enfield.
- 17 ftFlooding will become more widespread along the Connecticut River from the Massachusetts towns of Agawam and Longmeadow, through the northern Connecticut towns of Suffield and Enfield.
- 16 ftFlooding impacts low lying areas along the Connecticut River from the Massachusetts towns of Agawam and Longmeadow, through the northern Connecticut towns of Suffield and Enfield.
- 15 ftLowland flooding will begin along the Connecticut River near Thompsonville.
Highest crests on record
- 26.6 ft — March 20, 1936
- 24.4 ft — July 23, 1938
- 20.93 ft — August 19, 1955
- 20.8 ft — May 31, 1984
- 20.47 ft — April 20, 1933
Recent crests: 15.41 ft (May 11, 2025) · 15.3 ft (March 18, 2025) · 15.53 ft (April 14, 2024) · 15.27 ft (March 8, 2024) · 16.56 ft (December 19, 2023)
Highest flow on record
282,000 cubic feet per second — March 20, 1936. From the USGS's yearly peaks since 1929.
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (TMVC3); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.