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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.)
Jul-11 04:30 am 42.43 2,868 .6
Jul-11 03:30 am 42.43 2,868 .6
Jul-11 02:30 am 42.45 2,914 .6
Jul-11 01:30 am 42.46 2,937 .6
Jul-11 12:30 am 42.48 2,983 .6
Jul-10 11:30 pm 42.53 3,100 .7
Jul-10 10:30 pm 42.55 3,147 .7
Jul-10 09:30 pm 42.58 3,218 .7
Jul-10 08:30 pm 42.59 3,242 .7
Jul-10 07:30 pm 42.59 3,242 .7
Jul-10 06:30 pm 42.62 3,313 .7
Jul-10 05:30 pm 42.66 3,410 .7
Jul-10 04:30 pm 42.65 3,386 .7
Jul-10 03:30 pm 42.63 3,338 .7
Jul-10 02:30 pm 42.61 3,289 .7
Jul-10 01:30 pm 42.64 3,362 .7
Jul-10 12:30 pm 42.63 3,338 .7
Jul-10 11:30 am 42.63 3,338 .7
Jul-10 10:30 am 42.62 3,313 .7
Jul-10 09:30 am 42.63 3,338 .7
Jul-10 08:30 am 42.65 3,386 .7
Jul-10 07:30 am 42.67 3,434 .7
Jul-10 06:30 am 42.67 3,434 .7
Jul-10 05:30 am 42.67 3,434 .7
Jul-10 04:30 am 42.67 3,434 .7
Report Generated July 11, 2026 08:56 am