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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.)
Sep-04 06:30 pm 41.43 1,046 .2
Sep-04 05:30 pm 41.45 1,071 .2
Sep-04 04:30 pm 41.45 1,071 .2
Sep-04 03:30 pm 41.45 1,071 .2
Sep-04 02:30 pm 41.45 1,071 .2
Sep-04 01:30 pm 41.47 1,095 .2
Sep-04 12:30 pm 41.49 1,120 .2
Sep-04 11:30 am 41.48 1,108 .2
Sep-04 10:30 am 41.49 1,120 .2
Sep-04 09:30 am 41.50 1,132 .2
Sep-04 08:30 am 41.51 1,145 .3
Sep-04 07:30 am 41.53 1,170 .3
Sep-04 06:30 am 41.51 1,145 .3
Sep-04 05:30 am 41.47 1,095 .2
Sep-04 04:30 am 41.49 1,120 .2
Sep-04 03:30 am 41.51 1,145 .3
Sep-04 02:30 am 41.60 1,257 .3
Sep-04 01:30 am 41.70 1,406 .3
Sep-04 12:30 am 41.77 1,512 .3
Sep-03 11:30 pm 41.84 1,636 .4
Sep-03 10:30 pm 41.85 1,655 .4
Sep-03 09:30 pm 41.90 1,750 .4
Sep-03 08:30 pm 41.82 1,599 .3
Sep-03 07:30 pm 41.82 1,599 .3
Sep-03 06:30 pm 41.79 1,543 .3
Report Generated September 04, 2026 11:39 pm