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Merrimack River at Lowell
 Total Drainage Area: 4,635 sq. miles 
 Drainage Area Controlled by Corps Dams: 1,619 sq. miles (35%) 
 Warning Flow/Stage: 28,500 cfs / 49.0 feet 
 Flood Flow/Stage: 45,100 cfs / 52.0 feet 
Date Time
(Eastern)
Stage
(ft)
Flow
(cfs)
CSM
(cfs / sq. mi.)
11 Mar 2026 05:30 PM 45.57 12,667 2.7
11 Mar 2026 05:15 PM 45.57 12,667 2.7
11 Mar 2026 05:00 PM 45.58 12,706 2.7
11 Mar 2026 04:45 PM 45.59 12,744 2.8
11 Mar 2026 04:30 PM 45.59 12,744 2.8
11 Mar 2026 04:15 PM 45.53 12,514 2.7
11 Mar 2026 04:00 PM 45.48 12,323 2.7
11 Mar 2026 03:45 PM 45.45 12,209 2.6
11 Mar 2026 03:30 PM 45.44 12,171 2.6
11 Mar 2026 03:15 PM 45.44 12,171 2.6
11 Mar 2026 03:00 PM 45.45 12,209 2.6
11 Mar 2026 02:45 PM 45.43 12,134 2.6
11 Mar 2026 02:30 PM 45.42 12,096 2.6
11 Mar 2026 02:15 PM 45.37 11,907 2.6
11 Mar 2026 02:00 PM 45.36 11,870 2.6
11 Mar 2026 01:45 PM 45.38 11,945 2.6
11 Mar 2026 01:30 PM 45.37 11,907 2.6
11 Mar 2026 01:15 PM 45.28 11,570 2.5
11 Mar 2026 01:00 PM 45.22 11,348 2.5
11 Mar 2026 12:45 PM 45.20 11,274 2.4
11 Mar 2026 12:30 PM 45.17 11,163 2.4
11 Mar 2026 12:15 PM 45.18 11,200 2.4
11 Mar 2026 12:00 PM 45.17 11,163 2.4
11 Mar 2026 11:45 AM 45.16 11,127 2.4
11 Mar 2026 11:30 AM 45.16 11,127 2.4
11 Mar 2026 11:15 AM 45.15 11,090 2.4
11 Mar 2026 11:00 AM 45.16 11,127 2.4
11 Mar 2026 10:45 AM 45.13 11,017 2.4
11 Mar 2026 10:30 AM 45.12 10,980 2.4
11 Mar 2026 10:15 AM 45.11 10,944 2.4
11 Mar 2026 10:00 AM 45.10 10,907 2.4
11 Mar 2026 09:45 AM 45.06 10,762 2.3
11 Mar 2026 09:30 AM 45.02 10,617 2.3
11 Mar 2026 09:15 AM 44.95 10,365 2.2
11 Mar 2026 09:00 AM 44.95 10,365 2.2
11 Mar 2026 08:45 AM 45.01 10,581 2.3
11 Mar 2026 08:30 AM 45.00 10,545 2.3
11 Mar 2026 08:15 AM 44.97 10,437 2.3
11 Mar 2026 08:00 AM 44.95 10,365 2.2
11 Mar 2026 07:45 AM 44.93 10,293 2.2
11 Mar 2026 07:30 AM 44.91 10,222 2.2
11 Mar 2026 07:15 AM 44.91 10,222 2.2
11 Mar 2026 07:00 AM 44.89 10,151 2.2
11 Mar 2026 06:45 AM 44.89 10,151 2.2
11 Mar 2026 06:30 AM 44.88 10,115 2.2
11 Mar 2026 06:15 AM 44.86 10,044 2.2
11 Mar 2026 06:00 AM 44.86 10,044 2.2
11 Mar 2026 05:45 AM 44.83 9,938 2.1
11 Mar 2026 05:30 AM 44.82 9,903 2.1
11 Mar 2026 05:15 AM 44.79 9,797 2.1
11 Mar 2026 05:00 AM 44.81 9,868 2.1
11 Mar 2026 04:45 AM 44.82 9,903 2.1
11 Mar 2026 04:30 AM 44.81 9,868 2.1
11 Mar 2026 04:15 AM 44.79 9,797 2.1
11 Mar 2026 04:00 AM 44.77 9,727 2.1
11 Mar 2026 03:45 AM 44.75 9,657 2.1
11 Mar 2026 03:30 AM 44.74 9,622 2.1
11 Mar 2026 03:15 AM 44.74 9,622 2.1
11 Mar 2026 03:00 AM 44.74 9,622 2.1
11 Mar 2026 02:45 AM 44.75 9,657 2.1
11 Mar 2026 02:30 AM 44.74 9,622 2.1
11 Mar 2026 02:15 AM 44.73 9,587 2.1
11 Mar 2026 02:00 AM 44.71 9,518 2.1
11 Mar 2026 01:45 AM 44.69 9,448 2.0
11 Mar 2026 01:30 AM 44.69 9,448 2.0
11 Mar 2026 01:15 AM 44.68 9,414 2.0
11 Mar 2026 01:00 AM 44.65 9,310 2.0
11 Mar 2026 12:45 AM 44.64 9,275 2.0
11 Mar 2026 12:30 AM 44.63 9,241 2.0
11 Mar 2026 12:15 AM 44.63 9,241 2.0
11 Mar 2026 12:00 AM 44.61 9,172 2.0
10 Mar 2026 11:45 PM 44.59 9,104 2.0
10 Mar 2026 11:30 PM 44.59 9,104 2.0
10 Mar 2026 11:15 PM 44.58 9,069 2.0
10 Mar 2026 11:00 PM 44.56 9,001 1.9
10 Mar 2026 10:45 PM 44.55 8,967 1.9
10 Mar 2026 10:30 PM 44.53 8,899 1.9
10 Mar 2026 10:15 PM 44.53 8,899 1.9
10 Mar 2026 10:00 PM 44.52 8,865 1.9
10 Mar 2026 09:45 PM 44.51 8,831 1.9
10 Mar 2026 09:30 PM 44.51 8,831 1.9
10 Mar 2026 09:15 PM 44.52 8,865 1.9
10 Mar 2026 09:00 PM 44.52 8,865 1.9
10 Mar 2026 08:45 PM 44.54 8,933 1.9
10 Mar 2026 08:30 PM 44.53 8,899 1.9
10 Mar 2026 08:15 PM 44.49 8,764 1.9
10 Mar 2026 08:00 PM 44.47 8,696 1.9
10 Mar 2026 07:45 PM 44.45 8,629 1.9
10 Mar 2026 07:30 PM 44.45 8,629 1.9
10 Mar 2026 07:15 PM 44.46 8,662 1.9
10 Mar 2026 07:00 PM 44.45 8,629 1.9
10 Mar 2026 06:45 PM 44.42 8,528 1.8
10 Mar 2026 06:30 PM 44.34 8,262 1.8
10 Mar 2026 06:15 PM 44.28 8,064 1.7
10 Mar 2026 06:00 PM 44.28 8,064 1.7
10 Mar 2026 05:45 PM 44.29 8,097 1.8
10 Mar 2026 05:30 PM 44.28 8,064 1.7
10 Mar 2026 05:15 PM 44.29 8,097 1.8
10 Mar 2026 05:00 PM 44.29 8,097 1.8
10 Mar 2026 04:45 PM 44.29 8,097 1.8
10 Mar 2026 04:30 PM 44.30 8,130 1.8
10 Mar 2026 04:15 PM 44.30 8,130 1.8
10 Mar 2026 04:00 PM 44.27 8,032 1.7
10 Mar 2026 03:45 PM 44.23 7,901 1.7
10 Mar 2026 03:30 PM 44.19 7,771 1.7
10 Mar 2026 03:15 PM 44.18 7,739 1.7
10 Mar 2026 03:00 PM 44.12 7,545 1.6
10 Mar 2026 02:45 PM 44.05 7,322 1.6
10 Mar 2026 02:30 PM 44.00 7,164 1.6
10 Mar 2026 02:15 PM 43.99 7,133 1.5
10 Mar 2026 02:00 PM 43.97 7,070 1.5
10 Mar 2026 01:45 PM 43.95 7,007 1.5
10 Mar 2026 01:30 PM 43.96 7,039 1.5
10 Mar 2026 01:15 PM 43.95 7,007 1.5
10 Mar 2026 01:00 PM 43.95 7,007 1.5
10 Mar 2026 12:45 PM 43.95 7,007 1.5
10 Mar 2026 12:30 PM 43.94 6,976 1.5
10 Mar 2026 12:15 PM 43.95 7,007 1.5
10 Mar 2026 12:00 PM 43.96 7,039 1.5
10 Mar 2026 11:45 AM 43.96 7,039 1.5
10 Mar 2026 11:30 AM 43.95 7,007 1.5
10 Mar 2026 11:15 AM 43.95 7,007 1.5
10 Mar 2026 11:00 AM 43.96 7,039 1.5
10 Mar 2026 10:45 AM 43.96 7,039 1.5
10 Mar 2026 10:30 AM 43.95 7,007 1.5
10 Mar 2026 10:15 AM 43.96 7,039 1.5
10 Mar 2026 10:00 AM 43.96 7,039 1.5
10 Mar 2026 09:45 AM 43.96 7,039 1.5
10 Mar 2026 09:30 AM 43.96 7,039 1.5
10 Mar 2026 09:15 AM 43.96 7,039 1.5
10 Mar 2026 09:00 AM 43.97 7,070 1.5
10 Mar 2026 08:45 AM 43.97 7,070 1.5
10 Mar 2026 08:30 AM 43.97 7,070 1.5
10 Mar 2026 08:15 AM 43.96 7,039 1.5
10 Mar 2026 08:00 AM 43.96 7,039 1.5
10 Mar 2026 07:45 AM 43.95 7,007 1.5
10 Mar 2026 07:30 AM 43.93 6,945 1.5
10 Mar 2026 07:15 AM 43.92 6,914 1.5
10 Mar 2026 07:00 AM 43.93 6,945 1.5
10 Mar 2026 06:45 AM 43.93 6,945 1.5
10 Mar 2026 06:30 AM 43.94 6,976 1.5
10 Mar 2026 06:15 AM 43.95 7,007 1.5
10 Mar 2026 06:00 AM 43.95 7,007 1.5
10 Mar 2026 05:45 AM 43.93 6,945 1.5
10 Mar 2026 05:30 AM 43.94 6,976 1.5
10 Mar 2026 05:15 AM 43.97 7,070 1.5
10 Mar 2026 05:00 AM 43.96 7,039 1.5
10 Mar 2026 04:45 AM 43.94 6,976 1.5
10 Mar 2026 04:30 AM 43.94 6,976 1.5
10 Mar 2026 04:15 AM 43.94 6,976 1.5
10 Mar 2026 04:00 AM 43.96 7,039 1.5
10 Mar 2026 03:45 AM 43.94 6,976 1.5
10 Mar 2026 03:30 AM 43.94 6,976 1.5
10 Mar 2026 03:15 AM 43.92 6,914 1.5
10 Mar 2026 03:00 AM 43.92 6,914 1.5
10 Mar 2026 02:45 AM 43.93 6,945 1.5
10 Mar 2026 02:30 AM 43.92 6,914 1.5
10 Mar 2026 02:15 AM 43.91 6,883 1.5
10 Mar 2026 02:00 AM 43.88 6,790 1.5
10 Mar 2026 01:45 AM 43.86 6,728 1.5
10 Mar 2026 01:30 AM 43.84 6,667 1.4
10 Mar 2026 01:15 AM 43.82 6,605 1.4
10 Mar 2026 01:00 AM 43.78 6,483 1.4
10 Mar 2026 12:45 AM 43.75 6,392 1.4
10 Mar 2026 12:30 AM 43.74 6,362 1.4
10 Mar 2026 12:15 AM 43.73 6,332 1.4
10 Mar 2026 12:00 AM 43.74 6,362 1.4
09 Mar 2026 11:45 PM 43.73 6,332 1.4
09 Mar 2026 11:30 PM 43.70 6,242 1.4
09 Mar 2026 11:15 PM 43.67 6,152 1.3
09 Mar 2026 11:00 PM 43.65 6,092 1.3
09 Mar 2026 10:45 PM 43.66 6,122 1.3
09 Mar 2026 10:30 PM 43.66 6,122 1.3
09 Mar 2026 10:15 PM 43.67 6,152 1.3
Report Generated March 11, 2026 06:11 pm