Willimantic River at Coventry, CT
River level and flood forecast · Tolland County
The river is 4.4 ft below flood stage (8 ft).
Flow: 195 cubic feet per second (USGS).
Higher than normal for October 13.
Usual for October 13: 36 to 125 cubic feet per second (the middle half of 95 years).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.
Get flood alerts for this river
An email when the National Weather Service forecasts Willimantic River at Coventry to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 14 ft |
| Moderate flood stage | 11 ft |
| Flood stage | 8 ft |
| Action stage | 7 ft |
| Record crest (August 19, 1955) | 18.66 ft |
What floods at each level
From the National Weather Service, highest first.
- 14.5 ftNumerous roads are impacted in Coventry and Mansfield. This includes the following, Thornbush Road, Route 275, Depot Road, Cider Mill and Flanders River Roads, and Route 44 near the Mansfield/Coventry town line.
- 13.5 ftFloodwaters reaach base of Merrow Road Bridge.
- 10.5 ftFloodwaters inundate meadow Merrow Park near bridge.
- 8 ftFloodwaters reach the lowest lying sections of Thornbush and Flanders River Roads in Mansfield and Coventry.
Highest crests on record
- 18.66 ft — August 19, 1955
- 18.08 ft — September 21, 1938
- 14.81 ft — October 15, 2005
- 12.19 ft — March 12, 1936
- 11.64 ft — June 5, 1982
Recent crests: 9.67 ft (January 10, 2024) · 9.95 ft (December 19, 2023) · 8.29 ft (December 11, 2023) · 10.47 ft (September 2, 2021) · 9.75 ft (July 18, 2021)
Highest flow on record
24,200 cubic feet per second — August 19, 1955. From the USGS's yearly peaks since 1932.
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (CVTC3); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.