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Hydrograph River at a Glance Download
Merrimack River at Haverhill Stage (ft)Observed: 6.35 ft at 12:15AM Mar 16, 2024Observed: 6.3 ft at 12:30AM Mar 16, 2024Observed: 6.26 ft at 12:45AM Mar 16, 2024Observed: 6.22 ft at 1:00AM Mar 16, 2024Observed: 6.18 ft at 1:15AM Mar 16, 2024Observed: 6.16 ft at 1:30AM Mar 16, 2024Observed: 6.15 ft at 1:45AM Mar 16, 2024Observed: 6.14 ft at 2:00AM Mar 16, 2024Observed: 6.15 ft at 2:15AM Mar 16, 2024Observed: 6.18 ft at 2:30AM Mar 16, 2024Observed: 6.25 ft at 2:45AM Mar 16, 2024Observed: 6.36 ft at 3:00AM Mar 16, 2024Observed: 6.52 ft at 3:15AM Mar 16, 2024Observed: 6.75 ft at 3:30AM Mar 16, 2024Observed: 7.02 ft at 3:45AM Mar 16, 2024Observed: 7.33 ft at 4:00AM Mar 16, 2024Observed: 7.64 ft at 4:15AM Mar 16, 2024Observed: 7.93 ft at 4:30AM Mar 16, 2024Observed: 8.18 ft at 4:45AM Mar 16, 2024Observed: 8.4 ft at 5:00AM Mar 16, 2024Observed: 8.59 ft at 5:15AM Mar 16, 2024Observed: 8.73 ft at 5:30AM Mar 16, 2024Observed: 8.84 ft at 5:45AM Mar 16, 2024Observed: 8.9 ft at 6:00AM Mar 16, 2024Highest Observation: 8.91 ft at 6:15AM Mar 16, 2024Observed: 8.89 ft at 6:30AM Mar 16, 2024Observed: 8.83 ft at 6:45AM Mar 16, 2024Observed: 8.76 ft at 7:00AM Mar 16, 2024Observed: 8.66 ft at 7:15AM Mar 16, 2024Observed: 8.57 ft at 7:30AM Mar 16, 2024Observed: 8.46 ft at 7:45AM Mar 16, 2024Observed: 8.34 ft at 8:00AM Mar 16, 2024Observed: 8.21 ft at 8:15AM Mar 16, 2024Observed: 8.07 ft at 8:30AM Mar 16, 2024Observed: 7.95 ft at 8:45AM Mar 16, 2024Observed: 7.8 ft at 9:00AM Mar 16, 2024Observed: 7.66 ft at 9:15AM Mar 16, 2024Observed: 7.53 ft at 9:30AM Mar 16, 2024Observed: 7.39 ft at 9:45AM Mar 16, 2024Observed: 7.28 ft at 10:00AM Mar 16, 2024Observed: 7.15 ft at 10:15AM Mar 16, 2024Observed: 7.05 ft at 10:30AM Mar 16, 2024Observed: 6.94 ft at 10:45AM Mar 16, 2024Observed: 6.84 ft at 11:00AM Mar 16, 2024Observed: 6.75 ft at 11:15AM Mar 16, 2024Observed: 6.65 ft at 11:30AM Mar 16, 2024Observed: 6.57 ft at 11:45AM Mar 16, 2024Observed: 6.49 ft at 12:00PM Mar 16, 2024Observed: 6.43 ft at 12:15PM Mar 16, 2024Observed: 6.35 ft at 12:30PM Mar 16, 2024Observed: 6.29 ft at 12:45PM Mar 16, 2024Observed: 6.23 ft at 1:00PM Mar 16, 2024Observed: 6.18 ft at 1:15PM Mar 16, 2024Observed: 6.12 ft at 1:30PM Mar 16, 2024Observed: 6.08 ft at 1:45PM Mar 16, 2024Observed: 6.05 ft at 2:00PM Mar 16, 2024Observed: 6 ft at 2:15PM Mar 16, 2024Observed: 5.98 ft at 2:30PM Mar 16, 2024Observed: 5.95 ft at 2:45PM Mar 16, 2024Observed: 5.96 ft at 3:00PM Mar 16, 2024Observed: 5.98 ft at 3:15PM Mar 16, 2024Observed: 6.01 ft at 3:30PM Mar 16, 2024Observed: 6.07 ft at 3:45PM Mar 16, 2024Observed: 6.15 ft at 4:00PM Mar 16, 2024Observed: 6.28 ft at 4:15PM Mar 16, 2024Observed: 6.42 ft at 4:30PM Mar 16, 2024Observed: 6.6 ft at 4:45PM Mar 16, 2024Observed: 6.8 ft at 5:00PM Mar 16, 2024Observed: 6.99 ft at 5:15PM Mar 16, 2024Observed: 7.19 ft at 5:30PM Mar 16, 2024Observed: 7.35 ft at 5:45PM Mar 16, 2024Observed: 7.48 ft at 6:00PM Mar 16, 2024Observed: 7.58 ft at 6:15PM Mar 16, 2024Observed: 7.65 ft at 6:30PM Mar 16, 2024Observed: 7.69 ft at 6:45PM Mar 16, 2024Observed: 7.71 ft at 7:00PM Mar 16, 2024Observed: 7.69 ft at 7:15PM Mar 16, 2024Observed: 7.67 ft at 7:30PM Mar 16, 2024Observed: 7.64 ft at 7:45PM Mar 16, 2024Observed: 7.59 ft at 8:00PM Mar 16, 2024Observed: 7.53 ft at 8:15PM Mar 16, 2024Observed: 7.47 ft at 8:30PM Mar 16, 2024Observed: 7.4 ft at 8:45PM Mar 16, 2024Observed: 7.32 ft at 9:00PM Mar 16, 2024Observed: 7.25 ft at 9:15PM Mar 16, 2024Observed: 7.16 ft at 9:30PM Mar 16, 2024Observed: 7.06 ft at 9:45PM Mar 16, 2024Observed: 6.99 ft at 10:00PM Mar 16, 2024Observed: 6.92 ft at 10:15PM Mar 16, 2024Observed: 6.83 ft at 10:30PM Mar 16, 2024Observed: 6.76 ft at 10:45PM Mar 16, 2024Observed: 6.68 ft at 11:00PM Mar 16, 2024Observed: 6.61 ft at 11:15PM Mar 16, 2024Observed: 6.55 ft at 11:30PM Mar 16, 2024Observed: 6.49 ft at 11:45PM Mar 16, 2024Observed: 6.42 ft at 12:00AM Mar 17, 2024Observed: 6.37 ft at 12:15AM Mar 17, 2024Observed: 6.31 ft at 12:30AM Mar 17, 2024Observed: 6.28 ft at 12:45AM Mar 17, 2024Observed: 6.24 ft at 1:00AM Mar 17, 2024Observed: 6.2 ft at 1:15AM Mar 17, 2024Observed: 6.16 ft at 1:30AM Mar 17, 2024Observed: 6.14 ft at 1:45AM Mar 17, 2024Observed: 6.1 ft at 2:00AM Mar 17, 2024Observed: 6.09 ft at 2:15AM Mar 17, 2024Observed: 6.06 ft at 2:30AM Mar 17, 2024Observed: 6.06 ft at 2:45AM Mar 17, 2024Observed: 6.07 ft at 3:00AM Mar 17, 2024Observed: 6.08 ft at 3:15AM Mar 17, 2024Observed: 6.12 ft at 3:30AM Mar 17, 2024Observed: 6.21 ft at 3:45AM Mar 17, 2024Observed: 6.31 ft at 4:00AM Mar 17, 2024Observed: 6.48 ft at 4:15AM Mar 17, 2024Observed: 6.68 ft at 4:30AM Mar 17, 2024Observed: 6.93 ft at 4:45AM Mar 17, 2024Observed: 7.2 ft at 5:00AM Mar 17, 2024Observed: 7.47 ft at 5:15AM Mar 17, 2024Observed: 7.69 ft at 5:30AM Mar 17, 2024Observed: 7.89 ft at 5:45AM Mar 17, 2024Observed: 8.07 ft at 6:00AM Mar 17, 2024Observed: 8.23 ft at 6:15AM Mar 17, 2024Observed: 8.35 ft at 6:30AM Mar 17, 2024Observed: 8.45 ft at 6:45AM Mar 17, 2024Observed: 8.51 ft at 7:00AM Mar 17, 2024Observed: 8.53 ft at 7:15AM Mar 17, 2024Observed: 8.5 ft at 7:30AM Mar 17, 2024Observed: 8.46 ft at 7:45AM Mar 17, 2024Observed: 8.37 ft at 8:00AM Mar 17, 2024Observed: 8.29 ft at 8:15AM Mar 17, 2024Observed: 8.21 ft at 8:30AM Mar 17, 2024Observed: 8.12 ft at 8:45AM Mar 17, 2024Observed: 8.02 ft at 9:00AM Mar 17, 2024Observed: 7.89 ft at 9:15AM Mar 17, 2024Observed: 7.78 ft at 9:30AM Mar 17, 2024Observed: 7.67 ft at 9:45AM Mar 17, 2024Observed: 7.52 ft at 10:00AM Mar 17, 2024Observed: 7.41 ft at 10:15AM Mar 17, 2024Observed: 7.29 ft at 10:30AM Mar 17, 2024Observed: 7.18 ft at 10:45AM Mar 17, 2024Observed: 7.08 ft at 11:00AM Mar 17, 2024Observed: 6.97 ft at 11:15AM Mar 17, 2024Observed: 6.86 ft at 11:30AM Mar 17, 2024Observed: 6.75 ft at 11:45AM Mar 17, 2024Observed: 6.67 ft at 12:00PM Mar 17, 2024Observed: 6.58 ft at 12:15PM Mar 17, 2024Observed: 6.49 ft at 12:30PM Mar 17, 2024Observed: 6.41 ft at 12:45PM Mar 17, 2024Observed: 6.33 ft at 1:00PM Mar 17, 2024Observed: 6.26 ft at 1:15PM Mar 17, 2024Observed: 6.2 ft at 1:30PM Mar 17, 2024Observed: 6.15 ft at 1:45PM Mar 17, 2024Observed: 6.1 ft at 2:00PM Mar 17, 2024Observed: 6.05 ft at 2:15PM Mar 17, 2024Observed: 6 ft at 2:30PM Mar 17, 2024Observed: 5.98 ft at 2:45PM Mar 17, 2024Observed: 5.94 ft at 3:00PM Mar 17, 2024Observed: 5.9 ft at 3:15PM Mar 17, 2024Observed: 5.89 ft at 3:30PM Mar 17, 2024Observed: 5.88 ft at 3:45PM Mar 17, 2024Observed: 5.86 ft at 4:00PM Mar 17, 2024Observed: 5.85 ft at 4:15PM Mar 17, 2024Observed: 5.89 ft at 4:30PM Mar 17, 2024Observed: 5.94 ft at 4:45PM Mar 17, 2024Observed: 6.01 ft at 5:00PM Mar 17, 2024Observed: 6.12 ft at 5:15PM Mar 17, 2024Observed: 6.2 ft at 5:30PM Mar 17, 2024Observed: 6.39 ft at 5:45PM Mar 17, 2024Observed: 6.54 ft at 6:00PM Mar 17, 2024Observed: 6.71 ft at 6:15PM Mar 17, 2024Observed: 6.89 ft at 6:30PM Mar 17, 2024Observed: 7.04 ft at 6:45PM Mar 17, 2024Observed: 7.17 ft at 7:00PM Mar 17, 2024Observed: 7.26 ft at 7:15PM Mar 17, 2024Observed: 7.32 ft at 7:30PM Mar 17, 2024Observed: 7.34 ft at 7:45PM Mar 17, 2024Observed: 7.39 ft at 8:00PM Mar 17, 2024Observed: 7.39 ft at 8:15PM Mar 17, 2024Observed: 7.4 ft at 8:30PM Mar 17, 2024Observed: 7.36 ft at 8:45PM Mar 17, 2024Observed: 7.33 ft at 9:00PM Mar 17, 2024Observed: 7.28 ft at 9:15PM Mar 17, 2024Observed: 7.22 ft at 9:30PM Mar 17, 2024Observed: 7.16 ft at 9:45PM Mar 17, 2024Observed: 7.09 ft at 10:00PM Mar 17, 2024Observed: 7.01 ft at 10:15PM Mar 17, 2024Observed: 6.92 ft at 10:30PM Mar 17, 2024Observed: 6.84 ft at 10:45PM Mar 17, 2024Observed: 6.75 ft at 11:00PM Mar 17, 2024Observed: 6.67 ft at 11:15PM Mar 17, 2024Observed: 6.6 ft at 11:30PM Mar 17, 2024Observed: 6.52 ft at 11:45PM Mar 17, 2024Observed: 6.44 ft at 12:00AM Mar 18, 2024Observed: 6.38 ft at 12:15AM Mar 18, 2024Observed: 6.31 ft at 12:30AM Mar 18, 2024Observed: 6.24 ft at 12:45AM Mar 18, 2024Observed: 6.18 ft at 1:00AM Mar 18, 2024Observed: 6.12 ft at 1:15AM Mar 18, 2024Observed: 6.07 ft at 1:30AM Mar 18, 2024Observed: 6.01 ft at 1:45AM Mar 18, 2024Observed: 5.97 ft at 2:00AM Mar 18, 2024Observed: 5.93 ft at 2:15AM Mar 18, 2024Observed: 5.89 ft at 2:30AM Mar 18, 2024Observed: 5.85 ft at 2:45AM Mar 18, 2024Observed: 5.82 ft at 3:00AM Mar 18, 2024Observed: 5.79 ft at 3:15AM Mar 18, 2024Observed: 5.77 ft at 3:30AM Mar 18, 2024Observed: 5.76 ft at 3:45AM Mar 18, 2024Observed: 5.75 ft at 4:00AM Mar 18, 2024Observed: 5.76 ft at 4:15AM Mar 18, 2024Observed: 5.79 ft at 4:30AM Mar 18, 2024Observed: 5.84 ft at 4:45AM Mar 18, 2024Observed: 5.94 ft at 5:00AM Mar 18, 2024Observed: 6.06 ft at 5:15AM Mar 18, 2024Observed: 6.24 ft at 5:30AM Mar 18, 2024Observed: 6.46 ft at 5:45AM Mar 18, 2024Observed: 6.71 ft at 6:00AM Mar 18, 2024Observed: 6.96 ft at 6:15AM Mar 18, 2024Observed: 7.18 ft at 6:30AM Mar 18, 2024Observed: 7.36 ft at 6:45AM Mar 18, 2024Observed: 7.51 ft at 7:00AM Mar 18, 2024Observed: 7.66 ft at 7:15AM Mar 18, 2024Observed: 7.77 ft at 7:30AM Mar 18, 2024Observed: 7.85 ft at 7:45AM Mar 18, 2024Observed: 7.88 ft at 8:00AM Mar 18, 2024Observed: 7.9 ft at 8:15AM Mar 18, 2024Observed: 7.86 ft at 8:30AM Mar 18, 2024Observed: 7.83 ft at 8:45AM Mar 18, 2024Observed: 7.72 ft at 9:00AM Mar 18, 2024Observed: 7.7 ft at 9:15AM Mar 18, 2024Observed: 7.59 ft at 9:30AM Mar 18, 2024Observed: 7.53 ft at 9:45AM Mar 18, 2024Observed: 7.4 ft at 10:00AM Mar 18, 2024Observed: 7.3 ft at 10:15AM Mar 18, 2024Observed: 7.17 ft at 10:30AM Mar 18, 2024Observed: 7.04 ft at 10:45AM Mar 18, 2024Observed: 6.95 ft at 11:00AM Mar 18, 2024Observed: 6.86 ft at 11:15AM Mar 18, 2024Observed: 6.7 ft at 11:30AM Mar 18, 2024Observed: 6.62 ft at 11:45AM Mar 18, 2024Observed: 6.51 ft at 12:00PM Mar 18, 2024Observed: 6.41 ft at 12:15PM Mar 18, 2024Observed: 6.33 ft at 12:30PM Mar 18, 2024Observed: 6.24 ft at 12:45PM Mar 18, 2024Observed: 6.13 ft at 1:00PM Mar 18, 2024Observed: 6.05 ft at 1:15PM Mar 18, 2024Observed: 5.96 ft at 1:30PM Mar 18, 2024Observed: 5.9 ft at 1:45PM Mar 18, 2024Observed: 5.82 ft at 2:00PM Mar 18, 2024Observed: 5.74 ft at 2:15PM Mar 18, 2024Observed: 5.7 ft at 2:30PM Mar 18, 2024Observed: 5.64 ft at 2:45PM Mar 18, 2024Observed: 5.57 ft at 3:00PM Mar 18, 2024Observed: 5.55 ft at 3:15PM Mar 18, 2024Observed: 5.5 ft at 3:30PM Mar 18, 2024Observed: 5.46 ft at 3:45PM Mar 18, 2024Observed: 5.42 ft at 4:00PM Mar 18, 2024Observed: 5.39 ft at 4:15PM Mar 18, 2024Observed: 5.36 ft at 4:30PM Mar 18, 2024Observed: 5.34 ft at 4:45PM Mar 18, 2024Observed: 5.32 ft at 5:00PM Mar 18, 2024Observed: 5.31 ft at 5:15PM Mar 18, 2024Observed: 5.32 ft at 5:30PM Mar 18, 2024Observed: 5.34 ft at 5:45PM Mar 18, 2024Observed: 5.38 ft at 6:00PM Mar 18, 2024Observed: 5.45 ft at 6:15PM Mar 18, 2024Observed: 5.54 ft at 6:30PM Mar 18, 2024Observed: 5.65 ft at 6:45PM Mar 18, 2024Observed: 5.79 ft at 7:00PM Mar 18, 2024Observed: 5.96 ft at 7:15PM Mar 18, 2024Observed: 6.12 ft at 7:30PM Mar 18, 2024Observed: 6.26 ft at 7:45PM Mar 18, 2024Observed: 6.38 ft at 8:00PM Mar 18, 2024Observed: 6.49 ft at 8:15PM Mar 18, 2024Observed: 6.57 ft at 8:30PM Mar 18, 2024Observed: 6.64 ft at 8:45PM Mar 18, 2024Observed: 6.67 ft at 9:00PM Mar 18, 2024Observed: 6.69 ft at 9:15PM Mar 18, 2024Observed: 6.69 ft at 9:30PM Mar 18, 2024Observed: 6.67 ft at 9:45PM Mar 18, 2024Observed: 6.65 ft at 10:00PM Mar 18, 2024Observed: 6.61 ft at 10:15PM Mar 18, 2024Observed: 6.56 ft at 10:30PM Mar 18, 2024Observed: 6.51 ft at 10:45PM Mar 18, 2024Observed: 6.45 ft at 11:00PM Mar 18, 2024Forecast: 6.2 ft 1:00AM Mar 19, 2024Forecast: 6 ft 2:00AM Mar 19, 2024Forecast: 5.8 ft 3:00AM Mar 19, 2024Forecast: 5.7 ft 4:00AM Mar 19, 2024Forecast: 5.5 ft 5:00AM Mar 19, 2024Forecast: 5.6 ft 6:00AM Mar 19, 2024Forecast: 5.8 ft 7:00AM Mar 19, 2024Forecast: 6.1 ft 8:00AM Mar 19, 2024Forecast: 6.6 ft 9:00AM Mar 19, 2024Highest Forecast: 6.9 ft 10:00AM Mar 19, 2024Forecast: 6.8 ft 11:00AM Mar 19, 2024Forecast: 6.6 ft 12:00PM Mar 19, 2024Forecast: 6.4 ft 1:00PM Mar 19, 2024Forecast: 6.2 ft 2:00PM Mar 19, 2024Forecast: 5.9 ft 3:00PM Mar 19, 2024Forecast: 5.7 ft 4:00PM Mar 19, 2024Forecast: 5.5 ft 5:00PM Mar 19, 2024Forecast: 5.3 ft 6:00PM Mar 19, 2024Forecast: 5.3 ft 7:00PM Mar 19, 2024Forecast: 5.4 ft 8:00PM Mar 19, 2024Forecast: 5.7 ft 9:00PM Mar 19, 2024Forecast: 6.1 ft 10:00PM Mar 19, 2024Forecast: 6.3 ft 11:00PM Mar 19, 2024Forecast: 6.3 ft 12:00AM Mar 20, 2024Forecast: 6.2 ft 1:00AM Mar 20, 2024Forecast: 6 ft 2:00AM Mar 20, 2024Forecast: 5.7 ft 3:00AM Mar 20, 2024Forecast: 5.5 ft 4:00AM Mar 20, 2024Forecast: 5.3 ft 5:00AM Mar 20, 2024Forecast: 5.2 ft 6:00AM Mar 20, 2024Forecast: 5.2 ft 7:00AM Mar 20, 2024Forecast: 5.5 ft 8:00AM Mar 20, 2024Forecast: 5.9 ft 9:00AM Mar 20, 2024Forecast: 6.5 ft 10:00AM Mar 20, 2024Highest Forecast: 6.9 ft 11:00AM Mar 20, 2024Forecast: 6.8 ft 12:00PM Mar 20, 2024Forecast: 6.6 ft 1:00PM Mar 20, 2024Forecast: 6.3 ft 2:00PM Mar 20, 2024Forecast: 6 ft 3:00PM Mar 20, 2024Forecast: 5.7 ft 4:00PM Mar 20, 2024Forecast: 5.4 ft 5:00PM Mar 20, 2024Forecast: 5.2 ft 6:00PM Mar 20, 2024Forecast: 5 ft 7:00PM Mar 20, 2024Forecast: 5 ft 8:00PM Mar 20, 2024Forecast: 5.1 ft 9:00PM Mar 20, 2024Forecast: 5.4 ft 10:00PM Mar 20, 2024Forecast: 5.9 ft 11:00PM Mar 20, 2024Forecast: 6.2 ft 12:00AM Mar 21, 2024Forecast: 6.2 ft 1:00AM Mar 21, 2024Forecast: 6 ft 2:00AM Mar 21, 2024Forecast: 5.7 ft 3:00AM Mar 21, 2024Forecast: 5.5 ft 4:00AM Mar 21, 2024Forecast: 5.2 ft 5:00AM Mar 21, 2024Forecast: 5 ft 6:00AM Mar 21, 2024Forecast: 4.8 ft 7:00AM Mar 21, 2024Forecast: 4.8 ft 8:00AM Mar 21, 2024USGS--Water Resources of the United StatesHVRM3(plotting HGIRG) Graph Created (12:00AM Mar 19, 2024)ObservedForecast (issued 11:42AM Mar 18)Latest observed value: 6.45 ft at 11:00 PM EDT 18-Mar-2024. Flood Stage is 13 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: Gauge reading affected by ocean tides.

NOTE: Stage may be affected by ice.

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

NOTE: Forecasts for the Merrimack River at Haverhill are issued as needed during times of high water, but are not routinely available.

Return to Area Map
Flood Categories (in feet)
Major Flood Stage: 18
Moderate Flood Stage: 16
Flood Stage: 13
Action Stage: 12
Low Stage (in feet): -9999

Historic Crests
(1) 27.75 ft on 03/20/1936
(2) 20.25 ft on 09/13/1938
(3) 19.05 ft on 05/15/2006
(4) 17.64 ft on 04/19/2007
(5) 17.11 ft on 04/07/1987
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 14.46 ft on 04/01/2010
(2) 14.04 ft on 03/16/2010
(3) 17.64 ft on 04/19/2007
(4) 15.39 ft on 04/18/2007
(5) 19.05 ft on 05/15/2006
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
29 Catastrophic, life threatening flooding will occur from Haverhill and Merrimac to Amesbury and Newburyport. Flooding is exected to exceed the flood of record, from March 1936. The Seawall in downtown Haverhill will be overtopped. Widespread evacuations along the river are likely. Docks and boats, if not removed from the water, will likely be destroyed. Marinas will be severely impacted. Follow the directions of local officials, and stay away from these floodwaters.
27 Catastrophic, life threatening flooding is expected. This is near the flood of record, in March of 1936. Numerous evacuations are likely. Major flooding occurs along the river from Haverhill and Merrimac to the Amesbury and Newburyport vicinity. The Haverhill Seawall is expected to overtop, stretches of downtown Haverhill will be innundated. Follow the directions of local officials. Marinas will be severely impacted. Docks and boats, if not out of the water, will likely be destroyed.
24 Disastrous, life threatening flooding is expected. The river has not flooded to this level since 1936. Major flooding occurs along the river from Haverhill and Merrimac to Amesbury. Numerous evfacuations will occur. Flooding is also expected along Newburyport and Salisbury communities closest to the river. The Haverhill seawall begins to overtop, resulting in the onset of flooding in downtown Haverhill. Follow the directions of local officials. Docks and boats in the water will likely be destroyed.
23 Major flooding occurs from Haverhill and Merrimac to Amesbury. Newburyport and Salisbury will experience flooding along roadways closest to the Merrimack River. In Haverhill numerous evacuations are likely, especially along stretches of Coffin Avenue, Old Ferry Road, Western Avenue, Orchard Avenue and River Street. Follow the directions of local officials. Boats, docks and marinas will be severely impacted.
20.5 Major flooding will occur from Haverhill and Merrimac to Amesbury. Newburyport and Salisbury will experience flooding along roadways closest to the river. In Haverhill numerous evacuations are likely, especially along Coffin Avenue, Western Avenue, Orchard Avenue, Old Ferry Road and River Street. Follow the directions of local officials. Boats, docks and marinas will be severely impacted.
18 Major flooding is expected from Haverhill to Amesbury. The lowest lying roads in Salisbury and Newburyport will also be affected. In Haverhill, floodwaters will innundate portions of Old Ferry Road, Western Avenue, Coffin Avenue, Orchard Avenue, and River Street. Marinas along the river will likely experience considerable flooding. While floodwsaters are expected to remain on the river side of the sea wall, innundation may occur on the lowest levels of businesses adjacent to the river.
17 Floodwaters reach into low lying businesses and residences along River Street, Western Avenue, Coffin Avenue and Orchard Avenue. Backwater flooding occurs near old Ferry Road and Slavit Riverside Airport. Marinas, docks and boats will be impacted. Should evacuations be necessary, act quickly and follow the directions of emergency management officals. Know your alternate routes of travel so you can avoid flooded areas.
16 Flooding is likely in parts of Haverhill, particularly in the vicinity of Coffin Avenue. Floodwaters may surround homes in this area. Should evacuations become necessary, act quickly and follow the directions of emergency management officials. Marinas, boats and docks will be impacted.
15.5 Flooding is likely in low lying sections of Haverhill, including portions of Coffin Avenue. Should evacuations be necessary, act quickly and follow the directions of emergency management officals. Know your alternate routes of travel so you can avoid flooded areas. Marinas, boats and docks will be impacted.
14 Flooding is expected in low lying sections around Haverhill. Marinas near and downstream of Haverhill should take action to protect boats and docks due to the increased flows.
13 Flooding is expected in low lying sections around Haverhill. Marinas near and downstream of Haverhill should take action to protect boats and docks due to the increased flows.
About This Location Collapse

Latitude: 42.772778° N, Longitude: 71.083056° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 13 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 -0.80 12.2 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 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.

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Hydrologic Resources Additional Resources
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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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