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USGS Daily Statistics for Connecticut

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ICE EFFECTS ON STREAMFLOW - During winter, ice formation may cause stage and discharge values to appear higher than expected. Ice effects may be minor (occurring only at night and early morning) with baseline flows obvious, or the effects may be major (stage constantly increases over several days or weeks) resulting in greatly erroneous discharge. Streamgages experiencing minor ice conditions will continue to display stage and discharge values to enable users to estimate the approximate base-line stage and discharge. Streamgages experiencing major ice conditions will have the discharge record temporarily disabled to prevent use of erroneous discharge values. The discharge record will resume when it is determined that ice conditions are no longer present. Daily mean discharges during periods of ice effect will be estimated after detailed data analysis.

The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 01172010 CONNECTICUT R AT I-391 BRIDGE AT HOLYOKE, MA


Hampden County, Massachusetts
Hydrologic Unit Code 01080201
Latitude  42°11'29.29", Longitude  72°36'33.52" NAD83
Drainage area 8,332  square miles
Gage datum 32.42 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month
Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 2002-10-01 -> 2020-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 18,100 14,100 15,400 35,700 31,900 16,800 14,800 9,390 8,700 10,500 22,100 21,000
2 17,400 13,700 15,000 37,600 30,700 16,600 15,200 9,500 8,100 12,000 18,800 22,300
3 16,800 13,300 16,100 38,300 28,700 16,300 16,400 9,060 7,890 12,900 18,500 23,400
4 17,100 13,900 15,700 38,800 27,500 15,800 15,900 9,530 7,550 12,200 18,100 23,100
5 16,400 14,800 14,800 40,400 26,200 14,900 14,000 10,400 7,170 10,800 17,500 20,600
6 15,900 15,800 14,300 38,700 25,400 14,600 13,000 10,300 7,750 9,540 16,900 17,900
7 15,900 16,600 15,500 35,600 24,400 16,600 11,300 9,960 8,850 8,070 16,800 16,500
8 16,300 15,600 16,800 34,800 22,800 17,400 9,740 10,000 10,100 7,810 16,000 17,100
9 16,800 14,000 18,000 35,800 21,600 16,200 9,620 9,380 9,970 11,600 15,800 17,000
10 16,800 12,800 19,600 34,900 20,700 13,800 9,550 8,940 8,680 12,200 15,400 16,300
11 16,900 13,100 19,200 34,800 19,800 14,600 10,100 9,800 7,740 9,920 15,800 15,800
12 17,300 12,500 20,000 36,800 19,800 16,100 9,920 10,300 7,280 9,580 14,900 18,000
13 18,900 11,900 20,300 37,500 19,900 16,600 9,760 10,200 7,050 9,150 14,800 20,600
14 22,000 12,500 21,400 39,500 19,300 16,600 9,800 10,400 7,500 8,700 15,100 19,500
15 23,700 12,200 22,400 40,900 20,600 15,800 9,150 9,640 6,930 11,100 15,200 17,100
16 22,600 12,600 22,500 43,000 21,500 14,600 8,600 8,090 6,580 14,600 16,200 15,400
17 19,600 12,500 22,800 45,300 22,400 13,500 8,130 7,730 5,760 16,000 17,000 16,000
18 17,700 12,900 22,600 44,300 23,600 12,700 7,860 7,980 6,640 14,800 19,100 17,100
19 18,600 14,100 22,900 41,700 22,400 13,000 7,590 7,480 8,660 13,400 18,400 17,400
20 18,400 13,500 23,200 39,300 21,600 12,800 8,040 6,890 7,200 13,100 17,200 17,200
21 17,500 12,900 22,700 39,000 21,400 11,800 8,040 6,860 5,620 13,700 18,000 16,600
22 16,600 13,100 22,400 37,800 19,400 11,600 8,040 7,340 5,040 13,500 17,300 18,400
23 15,500 13,800 22,400 37,200 18,400 11,500 9,500 8,830 5,700 12,800 17,000 19,300
24 14,800 13,800 23,100 38,000 18,400 12,400 11,700 7,670 6,320 13,700 16,700 21,500
25 16,300 16,000 21,900 37,600 18,900 11,500 12,100 6,970 6,170 14,700 16,200 23,800
26 17,400 19,200 21,400 35,800 19,300 12,100 11,800 5,930 6,420 17,700 15,700 24,100
27 17,200 19,300 22,100 36,000 20,200 12,500 11,100 5,650 6,780 19,500 16,000 24,000
28 16,400 17,200 23,400 35,000 19,300 12,800 9,940 6,680 6,810 21,300 17,100 22,600
29 14,800 19,100 26,100 33,300 18,500 14,900 9,460 10,700 8,480 23,700 18,100 22,100
30 13,600   30,500 32,600 18,900 15,600 9,290 11,400 9,880 25,500 19,300 22,400
31 13,500   34,000   18,400   9,630 9,820   25,300   20,500