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This probabilistic forecast is issued by the Northeast River Forecast Center.
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Experimental Short Range Forecast Uncertainty (AHPS) - External Links: Product Description Document | Customer Survey

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About this graph
Forecasts for the Presumpscot River above West Falmouth are issued as needed during times of high water, but are not routinely available.
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Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 24
Moderate Flood Stage: 21
Flood Stage: 14
Action Stage: 12.5
Low Stage (in feet): -9999

Historic Crests
(1) 21.11 ft on 03/14/1977
(2) 16.28 ft on 02/25/1981
(3) 15.14 ft on 08/09/2023
(4) 14.55 ft on 04/11/1980
(5) 14.32 ft on 05/01/2023
(6) 14.21 ft on 01/09/1978
(7) 13.37 ft on 04/28/1979
(8) 12.79 ft on 04/02/1976
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(P): Preliminary values subject to further review.

Recent Crests
Currently none available.

Low Water Records
Currently none available.
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Gauge LocationGauge Map Marker
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
25 FEMA 0.2 percent flood level.
24 Major flooding in Westbrook. Inundation is around the FEMA 1 percent flood level. Floodwaters cover Route 302 cutting off access between Portland and Westbrook, inundating several businesses and homes on the north side of the river. Flooding to properties along Riverside Street incuding storage buildings. Materials should be moved to higher ground. This is a dangerous situation.
23 Backwater from Mill Brook floods properties off Forest Avenue and East Bridge Street in Westbrook.
22 Forest Avenue in Portland and Bridgton Road in Westbrook cut off by floodwaters. Water up to properties along River Street in Westbrook. The flood level is comparable to that of Hurricane Bob in 1991.
21 Flooding along Route 302 and East Bridge Street in Westbrook. Water Street flooded near Mentor Street with residential properties impacted.
16 Minor flooding with water encroaching upon East Bridge Street in Westbrook and Route 302. Riverbank Park in Westbrook floods. Sappi Wastewater Drive access cut off by floodwaters.
15 Minor flooding affects storage yards of industrial businesses on Warren Avenue in Westbrook. Property should be relocated to places which are 5 feet higher than nearby river banks to avoid being flooded or isolated.
14 Water approaches the backyards of properties along Water Street in Westbrook and Riverside Street in Portland.
12.5 River comes out of its banks and floods portions of Fraser Field. High flows make recreational activities hazardous.

Other Real-time and/or Archive Data Sources:

Additional Information Collapse
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.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics.

Click individual graphics to enlarge.

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
Gray Weather Forecast Office
P.O. Box 1208, 1 Weather Lane, Route 231
Gray, ME 04039
(207) 688-3216
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Page last modified: 2-Nov-2020 7:30 PM
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