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Merrimack River @ Lowell, Ma
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.)
Dec-12 01:30 pm 41.94 1,828 .4
Dec-12 12:30 pm 41.95 1,847 .4
Dec-12 11:30 am 41.97 1,887 .4
Dec-12 10:30 am 42.15 2,254 .5
Dec-12 09:30 am 42.23 2,424 .5
Dec-12 08:30 am 42.23 2,424 .5
Dec-12 07:30 am 42.22 2,402 .5
Dec-12 06:30 am 42.21 2,381 .5
Dec-12 05:30 am 42.20 2,359 .5
Dec-12 04:30 am 42.20 2,359 .5
Dec-12 03:30 am 42.19 2,338 .5
Dec-12 02:30 am 42.20 2,359 .5
Dec-12 01:30 am 42.22 2,402 .5
Dec-12 12:30 am 42.20 2,359 .5
Dec-11 11:30 pm 42.20 2,359 .5
Dec-11 10:30 pm 42.21 2,381 .5
Dec-11 09:30 pm 42.22 2,402 .5
Dec-11 08:30 pm 42.24 2,445 .5
Dec-11 07:30 pm 42.22 2,402 .5
Dec-11 06:30 pm 42.24 2,445 .5
Dec-11 05:30 pm 42.24 2,445 .5
Dec-11 04:30 pm 42.28 2,532 .6
Dec-11 03:30 pm 42.28 2,532 .6
Dec-11 02:30 pm 42.27 2,511 .5
Dec-11 01:30 pm 42.26 2,489 .5
Report Generated December 12, 2025 06:52 pm