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Merrimack River at Lowell

Critical Stages
50' - Action
52' - Flood
54' - Moderate
58' - Major

Latest Observation

Updated: 9:30 PM EST 12/5/25

Status: No Flooding

Stage: 42.38 ft

Flow: 2.85 kcfs

Forecast

TimeStage (ft)Flow (kcfs)
1 AM 12/6 42.3 2.66
7 AM 12/6 42.3 2.66
1 PM 12/6 42.2 2.43
7 PM 12/6 42.2 2.43
1 AM 12/7 42.2 2.43
7 AM 12/7 42.2 2.43
1 PM 12/7 42.2 2.43
7 PM 12/7 42.2 2.43
1 AM 12/8 42.2 2.43
7 AM 12/8 42.2 2.43
TimeStage (ft)Flow (kcfs)
9:30 PM 12/5 42.38 2.85
9:15 PM 12/5 42.38 2.85
9:00 PM 12/5 42.38 2.85
8:45 PM 12/5 42.38 2.85
8:30 PM 12/5 42.38 2.85
8:15 PM 12/5 42.38 2.85
8:00 PM 12/5 42.38 2.85
7:45 PM 12/5 42.38 2.85
7:30 PM 12/5 42.38 2.85
7:15 PM 12/5 42.38 2.85
7:00 PM 12/5 42.38 2.85
6:45 PM 12/5 42.38 2.85
6:30 PM 12/5 42.38 2.85
6:15 PM 12/5 42.38 2.85
6:00 PM 12/5 42.38 2.85
5:45 PM 12/5 42.38 2.85
5:30 PM 12/5 42.39 2.88
5:15 PM 12/5 42.38 2.85
5:00 PM 12/5 42.39 2.88
4:45 PM 12/5 42.39 2.88
4:30 PM 12/5 42.39 2.88
4:15 PM 12/5 42.39 2.88
4:00 PM 12/5 42.39 2.88
3:45 PM 12/5 42.39 2.88
3:30 PM 12/5 42.39 2.88
3:15 PM 12/5 42.4 2.9
3:00 PM 12/5 42.4 2.9
2:45 PM 12/5 42.41 2.93
2:30 PM 12/5 42.43 2.98
2:15 PM 12/5 42.44 3.01
Hydrograph for Merrimack River at Lowell
65' - This is a serious flood event. All persons along the Merrimack River should follow the evacuation recommendations from your local emergency managemant officials. If asked to evacuate, do so immediately. All flood protection measures must be rushed to completion in flood prone areas.
62' - This is a serious flood event. All persons along the Merrimack River should follow the evacuation recommendations from your local emergency managemant officials. If asked to evacuate, do so immediately. All flood protection measures must be rushed to completion in flood prone areas.
60' - This is a serious flood event. All persons along the Merrimack River from the Massachusetts border through Methuen should follow the evacuation recommendations from your local emergency managemant officials. If asked to evacuate, do so immediately. All flood protection measures must be rushed to completion in flood prone areas.
58' - Flooding is expected to overspread portions of Route 113 above Pawtucket Falls. Also, portions of Route 110 and several homes and businesses along Route 110 heading north and east into Tewksbury may begin to experience flooding. Follow the direction of your local emergency management officals. If asked to evacuate, do so immediately.
56' - Flooding will become more widespread from the New Hampshire border through Methuen. Those areas outside local flood protection should take measures to protect property. Follow the directions of your local emergency management agency.
55' - Flooding will become more widespread from the New Hampshire border through Methuen. Those areas outside local flood protection should take measures to protect property. Follow the directions of your local emergency management agency.
52' - Lowland flooding is likely along the Merrimack River. Most of the impact will be felt by businesses and mills where basement flooding is likely.
DateStage (ft)
Mar 20, 1936 68.4
Apr 23, 1852 60.6
Sep 23, 1938 60.57
May 15, 2006 58.84
Apr 17, 2007 58.09
Apr 7, 1987 57.16
Nov 5, 1927 56.5
Apr 6, 1960 56
Apr 20, 1933 56
Apr 1, 2010 54.64
Apr 14, 1934 54.02
Jun 1, 1984 53.71
Mar 16, 2010 53.63
Mar 15, 1977 53.41
Apr 8, 1924 53.4
Mar 31, 1925 53.3
Dec 20, 2023 53.16
Oct 23, 1996 53.1
Apr 18, 1996 53.04999923706
Apr 14, 1940 52.93

Data provided by the National Weather Service.