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Hydrograph River at a Glance Download
Connecticut River at Middle Haddam Stage (ft)Observed: 2.48 ft at 7:15AM Jan 18, 2021Observed: 2.41 ft at 7:30AM Jan 18, 2021Observed: 2.36 ft at 7:45AM Jan 18, 2021Observed: 2.31 ft at 8:00AM Jan 18, 2021Observed: 2.26 ft at 8:15AM Jan 18, 2021Observed: 2.2 ft at 8:30AM Jan 18, 2021Observed: 2.15 ft at 8:45AM Jan 18, 2021Observed: 2.1 ft at 9:00AM Jan 18, 2021Observed: 2.05 ft at 9:15AM Jan 18, 2021Observed: 1.99 ft at 9:30AM Jan 18, 2021Observed: 1.95 ft at 9:45AM Jan 18, 2021Observed: 1.9 ft at 10:00AM Jan 18, 2021Observed: 1.86 ft at 10:15AM Jan 18, 2021Observed: 1.83 ft at 10:30AM Jan 18, 2021Observed: 1.8 ft at 10:45AM Jan 18, 2021Observed: 1.78 ft at 11:00AM Jan 18, 2021Observed: 1.75 ft at 11:15AM Jan 18, 2021Observed: 1.74 ft at 11:30AM Jan 18, 2021Observed: 1.74 ft at 11:45AM Jan 18, 2021Observed: 1.75 ft at 12:00PM Jan 18, 2021Observed: 1.75 ft at 12:15PM Jan 18, 2021Observed: 1.8 ft at 12:30PM Jan 18, 2021Observed: 1.84 ft at 12:45PM Jan 18, 2021Observed: 1.89 ft at 1:00PM Jan 18, 2021Observed: 1.96 ft at 1:15PM Jan 18, 2021Observed: 2.07 ft at 1:30PM Jan 18, 2021Observed: 2.15 ft at 1:45PM Jan 18, 2021Observed: 2.25 ft at 2:00PM Jan 18, 2021Observed: 2.35 ft at 2:15PM Jan 18, 2021Observed: 2.44 ft at 2:30PM Jan 18, 2021Observed: 2.52 ft at 2:45PM Jan 18, 2021Observed: 2.59 ft at 3:00PM Jan 18, 2021Observed: 2.63 ft at 3:15PM Jan 18, 2021Observed: 2.67 ft at 3:30PM Jan 18, 2021Observed: 2.68 ft at 3:45PM Jan 18, 2021Observed: 2.69 ft at 4:00PM Jan 18, 2021Observed: 2.68 ft at 4:15PM Jan 18, 2021Observed: 2.68 ft at 4:30PM Jan 18, 2021Observed: 2.68 ft at 4:45PM Jan 18, 2021Observed: 2.66 ft at 5:00PM Jan 18, 2021Observed: 2.63 ft at 5:15PM Jan 18, 2021Observed: 2.61 ft at 5:30PM Jan 18, 2021Observed: 2.59 ft at 5:45PM Jan 18, 2021Observed: 2.57 ft at 6:00PM Jan 18, 2021Observed: 2.52 ft at 6:15PM Jan 18, 2021Observed: 2.48 ft at 6:30PM Jan 18, 2021Observed: 2.44 ft at 6:45PM Jan 18, 2021Observed: 2.38 ft at 7:00PM Jan 18, 2021Observed: 2.34 ft at 7:15PM Jan 18, 2021Observed: 2.28 ft at 7:30PM Jan 18, 2021Observed: 2.23 ft at 7:45PM Jan 18, 2021Observed: 2.18 ft at 8:00PM Jan 18, 2021Observed: 2.13 ft at 8:15PM Jan 18, 2021Observed: 2.08 ft at 8:30PM Jan 18, 2021Observed: 2.03 ft at 8:45PM Jan 18, 2021Observed: 1.98 ft at 9:00PM Jan 18, 2021Observed: 1.93 ft at 9:15PM Jan 18, 2021Observed: 1.88 ft at 9:30PM Jan 18, 2021Observed: 1.83 ft at 9:45PM Jan 18, 2021Observed: 1.78 ft at 10:00PM Jan 18, 2021Observed: 1.74 ft at 10:15PM Jan 18, 2021Observed: 1.69 ft at 10:30PM Jan 18, 2021Observed: 1.65 ft at 10:45PM Jan 18, 2021Observed: 1.61 ft at 11:00PM Jan 18, 2021Observed: 1.58 ft at 11:15PM Jan 18, 2021Observed: 1.56 ft at 11:30PM Jan 18, 2021Observed: 1.54 ft at 11:45PM Jan 18, 2021Observed: 1.54 ft at 12:00AM Jan 19, 2021Observed: 1.54 ft at 12:15AM Jan 19, 2021Observed: 1.54 ft at 12:30AM Jan 19, 2021Observed: 1.57 ft at 12:45AM Jan 19, 2021Observed: 1.61 ft at 1:00AM Jan 19, 2021Observed: 1.68 ft at 1:15AM Jan 19, 2021Observed: 1.78 ft at 1:30AM Jan 19, 2021Observed: 1.9 ft at 1:45AM Jan 19, 2021Observed: 2.03 ft at 2:00AM Jan 19, 2021Observed: 2.16 ft at 2:15AM Jan 19, 2021Observed: 2.28 ft at 2:30AM Jan 19, 2021Observed: 2.39 ft at 2:45AM Jan 19, 2021Observed: 2.51 ft at 3:00AM Jan 19, 2021Observed: 2.61 ft at 3:15AM Jan 19, 2021Observed: 2.7 ft at 3:30AM Jan 19, 2021Observed: 2.75 ft at 3:45AM Jan 19, 2021Observed: 2.79 ft at 4:00AM Jan 19, 2021Observed: 2.83 ft at 4:15AM Jan 19, 2021Observed: 2.86 ft at 4:30AM Jan 19, 2021Highest Observation: 2.88 ft at 4:45AM Jan 19, 2021Highest Observation: 2.88 ft at 5:00AM Jan 19, 2021Observed: 2.87 ft at 5:15AM Jan 19, 2021Observed: 2.85 ft at 5:30AM Jan 19, 2021Observed: 2.83 ft at 5:45AM Jan 19, 2021Observed: 2.8 ft at 6:00AM Jan 19, 2021Observed: 2.76 ft at 6:15AM Jan 19, 2021Observed: 2.72 ft at 6:30AM Jan 19, 2021Observed: 2.69 ft at 6:45AM Jan 19, 2021Observed: 2.63 ft at 7:00AM Jan 19, 2021Observed: 2.59 ft at 7:15AM Jan 19, 2021Observed: 2.56 ft at 7:30AM Jan 19, 2021Observed: 2.49 ft at 7:45AM Jan 19, 2021Observed: 2.44 ft at 8:00AM Jan 19, 2021Observed: 2.39 ft at 8:15AM Jan 19, 2021Observed: 2.32 ft at 8:30AM Jan 19, 2021Observed: 2.27 ft at 8:45AM Jan 19, 2021Observed: 2.22 ft at 9:00AM Jan 19, 2021Observed: 2.16 ft at 9:15AM Jan 19, 2021Observed: 2.11 ft at 9:30AM Jan 19, 2021Observed: 2.06 ft at 9:45AM Jan 19, 2021Observed: 2 ft at 10:00AM Jan 19, 2021Observed: 1.96 ft at 10:15AM Jan 19, 2021Observed: 1.92 ft at 10:30AM Jan 19, 2021Observed: 1.87 ft at 10:45AM Jan 19, 2021Observed: 1.84 ft at 11:00AM Jan 19, 2021Observed: 1.8 ft at 11:15AM Jan 19, 2021Observed: 1.76 ft at 11:30AM Jan 19, 2021Observed: 1.73 ft at 11:45AM Jan 19, 2021Observed: 1.69 ft at 12:00PM Jan 19, 2021Observed: 1.67 ft at 12:15PM Jan 19, 2021Observed: 1.65 ft at 12:30PM Jan 19, 2021Observed: 1.64 ft at 12:45PM Jan 19, 2021Observed: 1.64 ft at 1:00PM Jan 19, 2021Observed: 1.65 ft at 1:15PM Jan 19, 2021Observed: 1.68 ft at 1:30PM Jan 19, 2021Observed: 1.72 ft at 1:45PM Jan 19, 2021Observed: 1.79 ft at 2:00PM Jan 19, 2021Observed: 1.89 ft at 2:15PM Jan 19, 2021Observed: 2 ft at 2:30PM Jan 19, 2021Observed: 2.12 ft at 2:45PM Jan 19, 2021Observed: 2.24 ft at 3:00PM Jan 19, 2021Observed: 2.36 ft at 3:15PM Jan 19, 2021Observed: 2.47 ft at 3:30PM Jan 19, 2021Observed: 2.57 ft at 3:45PM Jan 19, 2021Observed: 2.63 ft at 4:00PM Jan 19, 2021Observed: 2.69 ft at 4:15PM Jan 19, 2021Observed: 2.72 ft at 4:30PM Jan 19, 2021Observed: 2.74 ft at 4:45PM Jan 19, 2021Observed: 2.72 ft at 5:00PM Jan 19, 2021Observed: 2.71 ft at 5:15PM Jan 19, 2021Observed: 2.68 ft at 5:30PM Jan 19, 2021Observed: 2.65 ft at 5:45PM Jan 19, 2021Observed: 2.63 ft at 6:00PM Jan 19, 2021Observed: 2.59 ft at 6:15PM Jan 19, 2021Observed: 2.56 ft at 6:30PM Jan 19, 2021Observed: 2.52 ft at 6:45PM Jan 19, 2021Observed: 2.49 ft at 7:00PM Jan 19, 2021Observed: 2.45 ft at 7:15PM Jan 19, 2021Observed: 2.41 ft at 7:30PM Jan 19, 2021Observed: 2.36 ft at 7:45PM Jan 19, 2021Observed: 2.31 ft at 8:00PM Jan 19, 2021Observed: 2.26 ft at 8:15PM Jan 19, 2021Observed: 2.2 ft at 8:30PM Jan 19, 2021Observed: 2.15 ft at 8:45PM Jan 19, 2021Observed: 2.09 ft at 9:00PM Jan 19, 2021Observed: 2.03 ft at 9:15PM Jan 19, 2021Observed: 1.97 ft at 9:30PM Jan 19, 2021Observed: 1.91 ft at 9:45PM Jan 19, 2021Observed: 1.86 ft at 10:00PM Jan 19, 2021Observed: 1.8 ft at 10:15PM Jan 19, 2021Observed: 1.75 ft at 10:30PM Jan 19, 2021Observed: 1.69 ft at 10:45PM Jan 19, 2021Observed: 1.64 ft at 11:00PM Jan 19, 2021Observed: 1.6 ft at 11:15PM Jan 19, 2021Observed: 1.56 ft at 11:30PM Jan 19, 2021Observed: 1.52 ft at 11:45PM Jan 19, 2021Observed: 1.49 ft at 12:00AM Jan 20, 2021Observed: 1.47 ft at 12:15AM Jan 20, 2021Observed: 1.45 ft at 12:30AM Jan 20, 2021Observed: 1.44 ft at 12:45AM Jan 20, 2021Observed: 1.44 ft at 1:00AM Jan 20, 2021Observed: 1.43 ft at 1:15AM Jan 20, 2021Observed: 1.45 ft at 1:30AM Jan 20, 2021Observed: 1.49 ft at 1:45AM Jan 20, 2021Observed: 1.55 ft at 2:00AM Jan 20, 2021Observed: 1.64 ft at 2:15AM Jan 20, 2021Observed: 1.75 ft at 2:30AM Jan 20, 2021Observed: 1.89 ft at 2:45AM Jan 20, 2021Observed: 2.04 ft at 3:00AM Jan 20, 2021Observed: 2.21 ft at 3:15AM Jan 20, 2021Observed: 2.35 ft at 3:30AM Jan 20, 2021Observed: 2.48 ft at 3:45AM Jan 20, 2021Observed: 2.58 ft at 4:00AM Jan 20, 2021Observed: 2.64 ft at 4:15AM Jan 20, 2021Observed: 2.69 ft at 4:30AM Jan 20, 2021Observed: 2.73 ft at 4:45AM Jan 20, 2021Observed: 2.76 ft at 5:00AM Jan 20, 2021Observed: 2.78 ft at 5:15AM Jan 20, 2021Observed: 2.79 ft at 5:30AM Jan 20, 2021Observed: 2.81 ft at 5:45AM Jan 20, 2021Observed: 2.82 ft at 6:00AM Jan 20, 2021Observed: 2.83 ft at 6:15AM Jan 20, 2021Observed: 2.82 ft at 6:30AM Jan 20, 2021Observed: 2.79 ft at 6:45AM Jan 20, 2021Observed: 2.75 ft at 7:00AM Jan 20, 2021Observed: 2.72 ft at 7:15AM Jan 20, 2021Observed: 2.67 ft at 7:30AM Jan 20, 2021Observed: 2.63 ft at 7:45AM Jan 20, 2021Observed: 2.58 ft at 8:00AM Jan 20, 2021Observed: 2.52 ft at 8:15AM Jan 20, 2021Observed: 2.46 ft at 8:30AM Jan 20, 2021Observed: 2.41 ft at 8:45AM Jan 20, 2021Observed: 2.35 ft at 9:00AM Jan 20, 2021Observed: 2.3 ft at 9:15AM Jan 20, 2021Observed: 2.23 ft at 9:30AM Jan 20, 2021Observed: 2.17 ft at 9:45AM Jan 20, 2021Observed: 2.12 ft at 10:00AM Jan 20, 2021Observed: 2.06 ft at 10:15AM Jan 20, 2021Observed: 2.01 ft at 10:30AM Jan 20, 2021Observed: 1.95 ft at 10:45AM Jan 20, 2021Observed: 1.91 ft at 11:00AM Jan 20, 2021Observed: 1.85 ft at 11:15AM Jan 20, 2021Observed: 1.82 ft at 11:30AM Jan 20, 2021Observed: 1.77 ft at 11:45AM Jan 20, 2021Observed: 1.73 ft at 12:00PM Jan 20, 2021Observed: 1.69 ft at 12:15PM Jan 20, 2021Observed: 1.67 ft at 12:30PM Jan 20, 2021Observed: 1.63 ft at 12:45PM Jan 20, 2021USGS--Water Resources of the United StatesMHDC3(plotting HGIRZ) Graph Created (7:00AM Jan 21, 2021)ObservedLatest observed value: 1.63 ft at 12:45 PM EST 20-Jan-2021. Flood Stage is 7 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (EST)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Gauge reading affected by ocean tides.

NOTE: Gauge reading may be affected by ice. Forecast flows are unadjusted for ice.

Reliability of the Forecast: Based on current and forecast river, weather and reservoir conditions

NOTE: Forecasts for the Connecticut River at Middle Haddam are issued routinely year-round.

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Upstream Gauge - at Hartford Upstream Gauge
Flood Categories (in feet)
Major Flood Stage: 13
Moderate Flood Stage: 10.5
Flood Stage: 7
Action Stage: 5
Low Stage (in feet): -9999

Historic Crests
(1) 13.52 ft on 08/31/2011
(2) 12.56 ft on 01/17/2018 (P)
(3) 11.34 ft on 09/10/2011
(4) 11.24 ft on 04/02/2010
(5) 10.48 ft on 04/19/2011
(6) 10.07 ft on 04/29/2019
(7) 9.58 ft on 03/26/2010
(8) 9.50 ft on 03/09/2011
(9) 8.98 ft on 06/15/2013
(10) 8.92 ft on 12/24/2018
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 7.36 ft on 04/16/2020 (P)
(2) 10.07 ft on 04/29/2019
(3) 8.92 ft on 12/24/2018
(4) 8.05 ft on 11/06/2018
(5) 12.56 ft on 01/17/2018 (P)
(6) 7.51 ft on 11/01/2017
(7) 7.33 ft on 04/15/2017
(8) 8.00 ft on 04/09/2017
(9) 8.85 ft on 02/28/2016
(10) 7.33 ft on 04/02/2014 (P)
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:15
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 This is a serious and life threatening flood episode. Follow the direction of your local emergency management officals. If asked to evacuate, do so immediately. All flood protection measures must be rushed to completion in flood prone areas. Widespread inundation is likely from Middletown and Portland downstream through Chester, Old Lyme and Old Saybrook.
16.5 This is a serious and potentially life threatening flood episode. Follow the direction of your local emergency management officals. If asked to evacuate, do so immediately. All flood protection measures must be rushed to completion in flood prone areas.
15 Significant flooding will continue to impact low lying homes and businesses along the river from Wethersfield south through Middle Haddam, downstream to the mouth of the river in Old Saybrook. A portion of Route 9 will flood near the Middletown Portland railroad bridge. Follow the directions of your local emergency management officals.
13 Major river flooding will impact towns along the Connecticut River from Middletown and Portland downstream through Chester and Essex. Many roads near the river will be flooded. Some localized evacuations may be needed. Follow the directions of your local emergency management official. Know alternate routes for travel should roads in your area become flooded.
11.5 Flooding will likely result in the evacuation of low lying areas along River Road in Cromwell and Meadow Road in Portland. Flooding will occur in the Harbor Park area. Flooding increases in surrounding towns along the river, from Middletown and Portland to the river mouth at Old Saybrook.
10.5 Flooding continues to overspread sections of Portland and Middletown, as well as downstream towns including Chester and Essex. Some immediate river roads will be impassable. In Cromwell this usually impacts portions of River Road. In Rocky Hill, portions of Meadow Road will become impassable.
9.5 Flooding closes most of Meadow Road, Route 17A, in the Gildersleeve section of Portland. Flooding impacts the Middletown Marina and Meadow Farms. In Cromwell, portions of River Road will be closed. In Rocky Hill, parts of Meadow Road will be impassable for a time. Flooding continues along the river southward through Essex.
8 Flooding is expected in low lying sections along the Connecticut River from Wethersfield and Glastonbury downstream through Cromwell, Middletown and Portland. Boating interests should prepare for a period of swift river flows.
7 Flooding is likely in the vicinity of Meadow Road, Route 17A, in the Gildersleeve section of Portland. A portion of this roadway will likely be closed. This includes the Exchange Club of Portland Fairgrounds. Boating interests should prepare for a period of swift river flows during this period.
About This Location Collapse

Latitude: 41.541766° N, Longitude: 72.553145° W, Horizontal Datum: NAD27

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 7 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 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 0.00 7.00 Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

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.

River stage data collection for this gage began in September 2010.
Resources Collapse
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
Boston / Norton Weather Forecast Office
46 Commerce Way
Norton, MA 02766
(508) 622-3250
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