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This probabilistic forecast is issued by the Northeast River Forecast Center.

	Hydrograph			River at a Glance			Download			Probability Information Weekly Chance of Exceeding Levels Chance of Exceeding Levels During Entire Period Short-term Probabilistic Guidance (Experimental)

For official forecast click here

Experimental Short Range Forecast Uncertainty (AHPS) - External Links: Product Description Document | Customer Survey

About this graph

Forecasts for the Connecticut River at Hartford are issued routinely year-round.

Return to Area Map

Upstream Gauge

Downstream Gauge

Zoom Level:16

Flood Categories (in feet)

Major Flood Stage:	28
Moderate Flood Stage:	24
Flood Stage:	16
Action Stage:	12
Low Stage (in feet):	-9999

Historic Crests
(1) 37.60 ft on 03/21/1936
(2) 35.40 ft on 09/23/1938
(3) 30.74 ft on 06/01/1984
(4) 30.60 ft on 08/20/1955
(5) 29.30 ft on 05/01/1854
(6) 29.00 ft on 12/10/1927
(7) 28.20 ft on 04/21/1862
(8) 27.60 ft on 04/07/1960
(9) 26.70 ft on 03/29/1843
(10) 26.40 ft on 04/09/1901
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 18.37 ft on 07/17/2023
(2) 21.08 ft on 07/13/2023
(3) 18.56 ft on 12/27/2020 (P)
(4) 16.29 ft on 04/16/2020 (P)
(5) 20.29 ft on 04/29/2019
(6) 18.70 ft on 12/24/2018
(7) 17.37 ft on 11/05/2018
(8) 16.32 ft on 01/15/2018
(9) 16.82 ft on 11/01/2017
(10) 17.16 ft on 04/09/2017
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) -1.46 ft on 08/12/1974
(2) -1.05 ft on 11/02/1908

	Gauge Location	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

If you notice any errors in the below information, please contact our Webmaster
32	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. Towns from Windsor Locks and East Windsor south through Middletown, Haddam and Portland to the river mouth at Old Saybrook will experience significant flooding outside of levees and flood protection walls.
30	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. Towns from Windsor Locks and East Windsor south through Middletown, Haddam and Portland to Old Saybrook will experience significant flooding outside of levees and flood protection walls.
28	This is a serious 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. Towns from Windsor Locks and East Windsor south through Haddam and Portland will experience significant flooding outside of levees and flood protection walls. Further downstream through Cromwell, Middletown and further downstream this is a serious potentially life threatening flood.
26	Moderate flooding will occur along a large reach of the river from Windsor Locks and East Windsor, south through Haddam and Portland. Many river roads will be closed and some localized evacuations may be required. Follow the directions of local emergency management officials. Further downstream significant flooding will continue to impact low lying homes and businesses from Wethersfield south through Middletown and Middle Haddam, downstream to the mouth of the river in Old Saybrook.
24	Flooding affects some residential areas below Hartford through Rocky Hill. Upstream of Hartford, flooding is likely to affect Windsor Locks, East Windsor and Windsor. Should localized evacuations be necessary, act quickly. Further downstream 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 local evacuations may be needed.
23	Flooding affects some residential areas below Hartford through Rocky Hill, including some roadways. Upstream of Hartford, flooding is likely to affect Windsor Locks, East Windsor and Windsor. Should localized evacuations be necessary, act quickly. Know alternate routes for travel in your location should roads along the river become flooded and impassable. Further downstream flooding increases through Middletown and Portland to Old Saybrook. Some evacuations of low lying areas may be needed.
22	Flooding affects some residential areas below Hartford through Rocky Hill, including some roadways. Upstream of Hartford, flooding is likely to affect Windsor Locks, East Windsor and Windsor. Should localized evacuations be necessary, act quickly. Further downstream flooding will likely result in the evacuation of low lying area along River Road in Cromwell and Meadow Road in Portland. Flooding increases from Middletown and Portland to the river mouth at Old Saybrook.
21	Flooding is expected along the river in portions of Wethersfield, Glastonbury and Rocky Hill. The high waters and swift flows will disrupt some cross river ferry services. Upstream of Hartford flooding will continue to affect portions of Windsor. Immediate river roads may become impassable. Further downstream flooding will likely result in the evacuation of low lying areas along River Road in Cromwell and River Road in Portland. Flooding increases along the river from Middletown to Old Saybrook.
20	Flooding is expected along the river in portions of Wethersfield, Glastonbury, Rocky Hill and Cromwell. The high waters and swift flows will disrupt some cross river ferry services. Upstream of Hartford, flooding will continue to affect portions of Windsor. Immediate river roads may become impassable in all of these communities. Further downstream flooding will continue to overspread sections of Portland, Middletown as well as Chester.
19	Flooding of low lying areas below Hartford is expected, especially in areas that are outside of levee protection. Flooding also affects low lying areas upstream of Hartford, including a portion of Windsor where the Farmington River empties into the Connecticut River. Further downstream flooding closes most of Meadow Road, Route 17A, in Portland. Flooding impacts the Middletown Marina and Meadow Farms. In Cromwell, portions of River Road will be closed. Flooding continues along the river through Essex.
18	Flooding of low lying areas below Hartford is expected, especially in areas that are outside of levee protection. Flooding also affects low lying areas upstream of Hartford, including a portion of Windsor where the Farmington River empties into the Connecticut River. Further downstream 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 swift river flows.
17	Lowland flooding is expected along the Connecticut River from Hartford through Wethersfield and Glastonbury, primarily outside of levee protection. This will affect several riverside roadways as well as several park and recreational facilities. Further downstream flooding is expected in low lying sections along the Connecticut River from Wethersfield and Glastonbury downstream through Cromwell, Middletown and Portland.
16	Minor flooding is expected in several low lying areas outside levee protection in Hartford, as well as downstream through Wethersfield and Glastonbury. Further downstream 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.
14	Recreational boaters may need to secure their boats as the river elevation exceeds some docks. Swift river flows will also cause increasingly difficult sailing conditions.

Other Real-time and/or Archive Data Sources:

U.S. Geological Survey (USGS) Data and Site Info for Hartford

Additional Information

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)

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.

Collaborative Agencies

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

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Page last modified: 2-Nov-2020 7:30 PM

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