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Hydrograph River at a Glance Download
Connecticut River at Thompsonville Stage (ft)Observed: 9.46 ft at 11:30AM Mar 19, 2023Observed: 9.44 ft at 11:45AM Mar 19, 2023Observed: 9.42 ft at 12:00PM Mar 19, 2023Observed: 9.44 ft at 12:15PM Mar 19, 2023Observed: 9.45 ft at 12:30PM Mar 19, 2023Observed: 9.44 ft at 12:45PM Mar 19, 2023Observed: 9.45 ft at 1:00PM Mar 19, 2023Observed: 9.44 ft at 1:15PM Mar 19, 2023Observed: 9.44 ft at 1:30PM Mar 19, 2023Observed: 9.44 ft at 1:45PM Mar 19, 2023Observed: 9.42 ft at 2:00PM Mar 19, 2023Observed: 9.43 ft at 2:15PM Mar 19, 2023Observed: 9.44 ft at 2:30PM Mar 19, 2023Observed: 9.43 ft at 2:45PM Mar 19, 2023Observed: 9.43 ft at 3:00PM Mar 19, 2023Observed: 9.42 ft at 3:15PM Mar 19, 2023Observed: 9.42 ft at 3:30PM Mar 19, 2023Observed: 9.42 ft at 3:45PM Mar 19, 2023Observed: 9.42 ft at 4:00PM Mar 19, 2023Observed: 9.42 ft at 4:15PM Mar 19, 2023Observed: 9.43 ft at 4:30PM Mar 19, 2023Observed: 9.44 ft at 4:45PM Mar 19, 2023Observed: 9.43 ft at 5:00PM Mar 19, 2023Observed: 9.44 ft at 5:15PM Mar 19, 2023Observed: 9.42 ft at 5:30PM Mar 19, 2023Observed: 9.45 ft at 5:45PM Mar 19, 2023Observed: 9.44 ft at 6:00PM Mar 19, 2023Observed: 9.43 ft at 6:15PM Mar 19, 2023Observed: 9.43 ft at 6:30PM Mar 19, 2023Observed: 9.44 ft at 6:45PM Mar 19, 2023Observed: 9.44 ft at 7:00PM Mar 19, 2023Observed: 9.44 ft at 7:15PM Mar 19, 2023Observed: 9.44 ft at 7:30PM Mar 19, 2023Observed: 9.42 ft at 7:45PM Mar 19, 2023Observed: 9.43 ft at 8:00PM Mar 19, 2023Observed: 9.43 ft at 8:15PM Mar 19, 2023Observed: 9.43 ft at 8:30PM Mar 19, 2023Observed: 9.44 ft at 8:45PM Mar 19, 2023Observed: 9.44 ft at 9:00PM Mar 19, 2023Observed: 9.44 ft at 9:15PM Mar 19, 2023Observed: 9.44 ft at 9:30PM Mar 19, 2023Observed: 9.44 ft at 9:45PM Mar 19, 2023Observed: 9.44 ft at 10:00PM Mar 19, 2023Observed: 9.44 ft at 10:15PM Mar 19, 2023Observed: 9.45 ft at 10:30PM Mar 19, 2023Observed: 9.45 ft at 10:45PM Mar 19, 2023Observed: 9.45 ft at 11:00PM Mar 19, 2023Observed: 9.45 ft at 11:15PM Mar 19, 2023Observed: 9.45 ft at 11:30PM Mar 19, 2023Observed: 9.45 ft at 11:45PM Mar 19, 2023Observed: 9.45 ft at 12:00AM Mar 20, 2023Observed: 9.47 ft at 12:15AM Mar 20, 2023Observed: 9.45 ft at 12:30AM Mar 20, 2023Observed: 9.45 ft at 12:45AM Mar 20, 2023Observed: 9.46 ft at 1:00AM Mar 20, 2023Observed: 9.47 ft at 1:15AM Mar 20, 2023Observed: 9.48 ft at 1:30AM Mar 20, 2023Observed: 9.47 ft at 1:45AM Mar 20, 2023Observed: 9.49 ft at 2:00AM Mar 20, 2023Observed: 9.46 ft at 2:15AM Mar 20, 2023Observed: 9.48 ft at 2:30AM Mar 20, 2023Observed: 9.5 ft at 2:45AM Mar 20, 2023Observed: 9.48 ft at 3:00AM Mar 20, 2023Observed: 9.49 ft at 3:15AM Mar 20, 2023Observed: 9.5 ft at 3:30AM Mar 20, 2023Observed: 9.51 ft at 3:45AM Mar 20, 2023Observed: 9.51 ft at 4:00AM Mar 20, 2023Observed: 9.51 ft at 4:15AM Mar 20, 2023Observed: 9.52 ft at 4:30AM Mar 20, 2023Observed: 9.51 ft at 4:45AM Mar 20, 2023Observed: 9.51 ft at 5:00AM Mar 20, 2023Observed: 9.52 ft at 5:15AM Mar 20, 2023Observed: 9.51 ft at 5:30AM Mar 20, 2023Observed: 9.51 ft at 5:45AM Mar 20, 2023Observed: 9.52 ft at 6:00AM Mar 20, 2023Observed: 9.52 ft at 6:15AM Mar 20, 2023Observed: 9.52 ft at 6:30AM Mar 20, 2023Observed: 9.52 ft at 6:45AM Mar 20, 2023Observed: 9.53 ft at 7:00AM Mar 20, 2023Observed: 9.52 ft at 7:15AM Mar 20, 2023Observed: 9.53 ft at 7:30AM Mar 20, 2023Observed: 9.54 ft at 7:45AM Mar 20, 2023Observed: 9.53 ft at 8:00AM Mar 20, 2023Observed: 9.54 ft at 8:15AM Mar 20, 2023Observed: 9.54 ft at 8:30AM Mar 20, 2023Observed: 9.54 ft at 8:45AM Mar 20, 2023Observed: 9.55 ft at 9:00AM Mar 20, 2023Observed: 9.56 ft at 9:15AM Mar 20, 2023Observed: 9.55 ft at 9:30AM Mar 20, 2023Observed: 9.57 ft at 9:45AM Mar 20, 2023Observed: 9.55 ft at 10:00AM Mar 20, 2023Observed: 9.56 ft at 10:15AM Mar 20, 2023Observed: 9.55 ft at 10:30AM Mar 20, 2023Observed: 9.58 ft at 10:45AM Mar 20, 2023Observed: 9.57 ft at 11:00AM Mar 20, 2023Observed: 9.59 ft at 11:15AM Mar 20, 2023Observed: 9.59 ft at 11:30AM Mar 20, 2023Observed: 9.59 ft at 11:45AM Mar 20, 2023Observed: 9.59 ft at 12:00PM Mar 20, 2023Observed: 9.59 ft at 12:15PM Mar 20, 2023Observed: 9.61 ft at 12:30PM Mar 20, 2023Observed: 9.62 ft at 12:45PM Mar 20, 2023Observed: 9.62 ft at 1:00PM Mar 20, 2023Observed: 9.62 ft at 1:15PM Mar 20, 2023Observed: 9.64 ft at 1:30PM Mar 20, 2023Observed: 9.64 ft at 1:45PM Mar 20, 2023Observed: 9.66 ft at 2:00PM Mar 20, 2023Observed: 9.63 ft at 2:15PM Mar 20, 2023Observed: 9.64 ft at 2:30PM Mar 20, 2023Observed: 9.65 ft at 2:45PM Mar 20, 2023Observed: 9.67 ft at 3:00PM Mar 20, 2023Observed: 9.67 ft at 3:15PM Mar 20, 2023Observed: 9.67 ft at 3:30PM Mar 20, 2023Observed: 9.66 ft at 3:45PM Mar 20, 2023Observed: 9.64 ft at 4:00PM Mar 20, 2023Observed: 9.67 ft at 4:15PM Mar 20, 2023Observed: 9.66 ft at 4:30PM Mar 20, 2023Observed: 9.68 ft at 4:45PM Mar 20, 2023Observed: 9.68 ft at 5:00PM Mar 20, 2023Observed: 9.72 ft at 5:15PM Mar 20, 2023Observed: 9.73 ft at 5:30PM Mar 20, 2023Observed: 9.76 ft at 5:45PM Mar 20, 2023Observed: 9.79 ft at 6:00PM Mar 20, 2023Observed: 9.84 ft at 6:15PM Mar 20, 2023Observed: 9.85 ft at 6:30PM Mar 20, 2023Observed: 9.88 ft at 6:45PM Mar 20, 2023Observed: 9.91 ft at 7:00PM Mar 20, 2023Observed: 9.93 ft at 7:15PM Mar 20, 2023Observed: 9.93 ft at 7:30PM Mar 20, 2023Observed: 9.93 ft at 7:45PM Mar 20, 2023Highest Observation: 9.94 ft at 8:00PM Mar 20, 2023Observed: 9.91 ft at 8:15PM Mar 20, 2023Observed: 9.91 ft at 8:30PM Mar 20, 2023Observed: 9.89 ft at 8:45PM Mar 20, 2023Observed: 9.91 ft at 9:00PM Mar 20, 2023Observed: 9.88 ft at 9:15PM Mar 20, 2023Observed: 9.89 ft at 9:30PM Mar 20, 2023Observed: 9.91 ft at 9:45PM Mar 20, 2023Observed: 9.91 ft at 10:00PM Mar 20, 2023Observed: 9.89 ft at 10:15PM Mar 20, 2023Observed: 9.88 ft at 10:30PM Mar 20, 2023Observed: 9.89 ft at 10:45PM Mar 20, 2023Observed: 9.88 ft at 11:00PM Mar 20, 2023Observed: 9.88 ft at 11:15PM Mar 20, 2023Observed: 9.88 ft at 11:30PM Mar 20, 2023Observed: 9.88 ft at 11:45PM Mar 20, 2023Observed: 9.86 ft at 12:00AM Mar 21, 2023Observed: 9.87 ft at 12:15AM Mar 21, 2023Observed: 9.86 ft at 12:30AM Mar 21, 2023Observed: 9.84 ft at 12:45AM Mar 21, 2023Observed: 9.83 ft at 1:00AM Mar 21, 2023Observed: 9.81 ft at 1:15AM Mar 21, 2023Observed: 9.84 ft at 1:30AM Mar 21, 2023Observed: 9.84 ft at 1:45AM Mar 21, 2023Observed: 9.86 ft at 2:00AM Mar 21, 2023Observed: 9.86 ft at 2:15AM Mar 21, 2023Observed: 9.86 ft at 2:30AM Mar 21, 2023Observed: 9.85 ft at 2:45AM Mar 21, 2023Observed: 9.87 ft at 3:00AM Mar 21, 2023Observed: 9.86 ft at 3:15AM Mar 21, 2023Observed: 9.87 ft at 3:30AM Mar 21, 2023Observed: 9.85 ft at 3:45AM Mar 21, 2023Observed: 9.85 ft at 4:00AM Mar 21, 2023Observed: 9.85 ft at 4:15AM Mar 21, 2023Observed: 9.85 ft at 4:30AM Mar 21, 2023Observed: 9.83 ft at 4:45AM Mar 21, 2023Observed: 9.84 ft at 5:00AM Mar 21, 2023Observed: 9.82 ft at 5:15AM Mar 21, 2023Observed: 9.83 ft at 5:30AM Mar 21, 2023Observed: 9.83 ft at 5:45AM Mar 21, 2023Observed: 9.81 ft at 6:00AM Mar 21, 2023Observed: 9.81 ft at 6:15AM Mar 21, 2023Observed: 9.81 ft at 6:30AM Mar 21, 2023Observed: 9.8 ft at 6:45AM Mar 21, 2023Observed: 9.8 ft at 7:00AM Mar 21, 2023Observed: 9.79 ft at 7:15AM Mar 21, 2023Observed: 9.78 ft at 7:30AM Mar 21, 2023Observed: 9.78 ft at 7:45AM Mar 21, 2023Observed: 9.78 ft at 8:00AM Mar 21, 2023Observed: 9.77 ft at 8:15AM Mar 21, 2023Observed: 9.78 ft at 8:30AM Mar 21, 2023Observed: 9.76 ft at 8:45AM Mar 21, 2023Observed: 9.76 ft at 9:00AM Mar 21, 2023Observed: 9.75 ft at 9:15AM Mar 21, 2023Observed: 9.74 ft at 9:30AM Mar 21, 2023Observed: 9.74 ft at 9:45AM Mar 21, 2023Observed: 9.74 ft at 10:00AM Mar 21, 2023Observed: 9.73 ft at 10:15AM Mar 21, 2023Observed: 9.73 ft at 10:30AM Mar 21, 2023Observed: 9.72 ft at 10:45AM Mar 21, 2023Observed: 9.73 ft at 11:00AM Mar 21, 2023Observed: 9.72 ft at 11:15AM Mar 21, 2023Observed: 9.64 ft at 11:30AM Mar 21, 2023Observed: 9.66 ft at 11:45AM Mar 21, 2023Observed: 9.69 ft at 12:00PM Mar 21, 2023Observed: 9.7 ft at 12:15PM Mar 21, 2023Observed: 9.69 ft at 12:30PM Mar 21, 2023Observed: 9.69 ft at 12:45PM Mar 21, 2023Observed: 9.68 ft at 1:00PM Mar 21, 2023Observed: 9.65 ft at 1:15PM Mar 21, 2023Observed: 9.64 ft at 1:30PM Mar 21, 2023Observed: 9.61 ft at 1:45PM Mar 21, 2023Observed: 9.59 ft at 2:00PM Mar 21, 2023Observed: 9.59 ft at 2:15PM Mar 21, 2023Observed: 9.57 ft at 2:30PM Mar 21, 2023Observed: 9.56 ft at 2:45PM Mar 21, 2023Observed: 9.54 ft at 3:00PM Mar 21, 2023Observed: 9.54 ft at 3:15PM Mar 21, 2023Observed: 9.54 ft at 3:30PM Mar 21, 2023Observed: 9.52 ft at 3:45PM Mar 21, 2023Observed: 9.53 ft at 4:00PM Mar 21, 2023Observed: 9.52 ft at 4:15PM Mar 21, 2023Observed: 9.52 ft at 4:30PM Mar 21, 2023Observed: 9.52 ft at 4:45PM Mar 21, 2023Observed: 9.56 ft at 5:00PM Mar 21, 2023Observed: 9.59 ft at 5:15PM Mar 21, 2023Observed: 9.63 ft at 5:30PM Mar 21, 2023Observed: 9.65 ft at 5:45PM Mar 21, 2023Observed: 9.65 ft at 6:00PM Mar 21, 2023Observed: 9.65 ft at 6:15PM Mar 21, 2023Observed: 9.65 ft at 6:30PM Mar 21, 2023Observed: 9.66 ft at 6:45PM Mar 21, 2023Observed: 9.68 ft at 7:00PM Mar 21, 2023Observed: 9.66 ft at 7:15PM Mar 21, 2023Observed: 9.68 ft at 7:30PM Mar 21, 2023Observed: 9.67 ft at 7:45PM Mar 21, 2023Observed: 9.69 ft at 8:00PM Mar 21, 2023Observed: 9.69 ft at 8:15PM Mar 21, 2023Observed: 9.69 ft at 8:30PM Mar 21, 2023Observed: 9.68 ft at 8:45PM Mar 21, 2023Observed: 9.67 ft at 9:00PM Mar 21, 2023Observed: 9.68 ft at 9:15PM Mar 21, 2023Observed: 9.69 ft at 9:30PM Mar 21, 2023Observed: 9.7 ft at 9:45PM Mar 21, 2023Observed: 9.7 ft at 10:00PM Mar 21, 2023Observed: 9.68 ft at 10:15PM Mar 21, 2023Observed: 9.7 ft at 10:30PM Mar 21, 2023Observed: 9.71 ft at 10:45PM Mar 21, 2023Observed: 9.7 ft at 11:00PM Mar 21, 2023Observed: 9.69 ft at 11:15PM Mar 21, 2023Observed: 9.69 ft at 11:30PM Mar 21, 2023Observed: 9.7 ft at 11:45PM Mar 21, 2023Observed: 9.71 ft at 12:00AM Mar 22, 2023Observed: 9.71 ft at 12:15AM Mar 22, 2023Observed: 9.69 ft at 12:30AM Mar 22, 2023Observed: 9.7 ft at 12:45AM Mar 22, 2023Observed: 9.71 ft at 1:00AM Mar 22, 2023Observed: 9.69 ft at 1:15AM Mar 22, 2023Observed: 9.69 ft at 1:30AM Mar 22, 2023Observed: 9.7 ft at 1:45AM Mar 22, 2023Observed: 9.7 ft at 2:00AM Mar 22, 2023Observed: 9.7 ft at 2:15AM Mar 22, 2023Observed: 9.7 ft at 2:30AM Mar 22, 2023Observed: 9.69 ft at 2:45AM Mar 22, 2023Observed: 9.69 ft at 3:00AM Mar 22, 2023Observed: 9.68 ft at 3:15AM Mar 22, 2023Observed: 9.68 ft at 3:30AM Mar 22, 2023Observed: 9.67 ft at 3:45AM Mar 22, 2023Observed: 9.68 ft at 4:00AM Mar 22, 2023Observed: 9.69 ft at 4:15AM Mar 22, 2023Observed: 9.69 ft at 4:30AM Mar 22, 2023Observed: 9.67 ft at 4:45AM Mar 22, 2023Observed: 9.69 ft at 5:00AM Mar 22, 2023Observed: 9.69 ft at 5:15AM Mar 22, 2023Observed: 9.67 ft at 5:30AM Mar 22, 2023Observed: 9.68 ft at 5:45AM Mar 22, 2023Observed: 9.69 ft at 6:00AM Mar 22, 2023Observed: 9.68 ft at 6:15AM Mar 22, 2023Observed: 9.67 ft at 6:30AM Mar 22, 2023Observed: 9.67 ft at 6:45AM Mar 22, 2023Observed: 9.67 ft at 7:00AM Mar 22, 2023Observed: 9.66 ft at 7:15AM Mar 22, 2023Observed: 9.66 ft at 7:30AM Mar 22, 2023Observed: 9.65 ft at 7:45AM Mar 22, 2023Observed: 9.65 ft at 8:00AM Mar 22, 2023Observed: 9.66 ft at 8:15AM Mar 22, 2023Observed: 9.65 ft at 8:30AM Mar 22, 2023Observed: 9.64 ft at 8:45AM Mar 22, 2023Observed: 9.64 ft at 9:00AM Mar 22, 2023Observed: 9.64 ft at 9:15AM Mar 22, 2023Observed: 9.62 ft at 9:30AM Mar 22, 2023Observed: 9.62 ft at 9:45AM Mar 22, 2023Observed: 9.61 ft at 10:00AM Mar 22, 2023Observed: 9.61 ft at 10:15AM Mar 22, 2023Observed: 9.6 ft at 10:30AM Mar 22, 2023Observed: 9.6 ft at 10:45AM Mar 22, 2023Forecast: 9.8 ft 2:00PM Mar 22, 2023Forecast: 9.9 ft 8:00PM Mar 22, 2023Forecast: 9.9 ft 2:00AM Mar 23, 2023Forecast: 9.9 ft 8:00AM Mar 23, 2023Forecast: 10 ft 2:00PM Mar 23, 2023Forecast: 10 ft 8:00PM Mar 23, 2023Forecast: 10.2 ft 2:00AM Mar 24, 2023Highest Forecast: 10.4 ft 8:00AM Mar 24, 2023USGS--Water Resources of the United StatesTMVC3(plotting HGIRG) Graph Created (11:15AM Mar 22, 2023)ObservedForecast (issued 11:19AM Mar 21)Latest observed value: 9.6 ft at 10:45 AM EDT 22-Mar-2023. Flood Stage is 15 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: Forecasts for the Connecticut River at Thompsonville are issued routinely year-round.

Vertical datum height surveyed by the USGS

Return to Area Map
Upstream Gauge - at Springfield Upstream Gauge Downstream Gauge Downstream Gauge - at Hartford
Flood Categories (in feet)
Major Flood Stage: 19
Moderate Flood Stage: 17
Flood Stage: 15
Action Stage: 14
Low Stage (in feet): -9999

Historic Crests
(1) 26.60 ft on 03/20/1936
(2) 24.40 ft on 07/23/1938
(3) 20.93 ft on 08/19/1955
(4) 20.80 ft on 05/31/1984
(5) 20.47 ft on 04/20/1933
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 15.08 ft on 12/27/2020 (P)
(2) 15.34 ft on 04/28/2019
(3) 15.18 ft on 04/23/2019
(4) 15.54 ft on 04/17/2019
(5) 15.34 ft on 12/23/2018
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
 Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
18 Significant 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 Flooding 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 Flooding 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 Lowland flooding will begin along the Connecticut River near Thompsonville.
About This Location Collapse

Latitude: 41.987319° N, Longitude: 72.605833° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 15 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)		 Elevation
(gauge height = flood stage)		 Elevation information source
NAVD88 27.75 42.75 Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other NULL NULL  

Current/Historical Observations:
Additional Information Collapse
Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
10 Day (HEFS) 7 Day (NAEFS) 7 Day (GEFS)
HEFS Ensemble NAEFS Ensemble GEFS Ensemble

Note: Use the official hydrograph at the top of this web page for river levels within the next 72 hours.

Click individual graphics to enlarge.
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Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
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46 Commerce Way
Norton, MA 02766
(508) 622-3250
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