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USGS Daily Statistics for Washington

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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 14238000 COWLITZ RIVER BELOW MAYFIELD DAM, WA


Lewis County, Washington
Hydrologic Unit Code 17080005
Latitude  46°30'38", Longitude 122°36'54" NAD27
Drainage area 1,400  square miles
Gage datum 226.60 feet above NGVD29
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00060, Discharge, cubic feet per second,
Day of
month
Mean of daily mean values for each day for 83 - 84 years of record in, ft3/s   (Calculation Period 1933-10-01 -> 2018-09-30)

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 8,590 8,890 6,900 6,490 6,890 7,300 5,720 3,110 2,520 2,900 4,920 10,200
2 8,780 8,430 6,820 6,640 6,990 7,190 5,510 3,050 2,570 2,920 4,880 10,400
3 8,740 8,090 6,870 6,470 7,010 7,250 5,310 2,980 2,570 3,080 5,070 10,500
4 8,880 8,480 6,850 6,470 7,060 7,290 5,030 2,880 2,580 3,040 5,270 10,800
5 8,990 8,430 6,840 6,450 7,120 7,390 5,000 2,820 2,630 3,070 5,560 10,600
6 8,720 8,430 6,730 6,500 7,230 7,330 4,990 2,810 2,610 3,070 5,810 10,000
7 9,010 8,740 6,580 6,600 7,170 7,470 4,950 2,830 2,590 3,130 6,080 9,970
8 8,970 8,730 6,450 6,550 7,110 7,560 4,970 2,780 2,640 3,180 6,450 9,700
9 8,810 8,580 6,580 6,520 7,070 7,700 4,980 2,750 2,620 3,320 6,480 9,830
10 8,800 8,700 6,770 6,560 7,110 7,700 4,860 2,740 2,640 3,550 6,380 10,100
11 8,540 8,310 6,750 6,500 7,150 7,590 4,720 2,770 2,660 3,590 6,450 10,300
12 8,750 8,040 6,820 6,480 7,220 7,470 4,650 2,730 2,620 3,570 6,640 10,700
13 8,880 7,800 6,820 6,400 7,320 7,380 4,580 2,700 2,550 3,560 6,790 10,700
14 8,940 7,610 6,740 6,530 7,380 7,260 4,560 2,740 2,580 3,530 6,820 10,400
15 9,180 7,630 6,810 6,730 7,270 7,280 4,560 2,680 2,640 3,470 7,080 10,300
16 9,350 7,690 6,820 6,770 7,260 7,370 4,420 2,720 2,650 3,500 7,130 10,200
17 9,170 7,630 6,800 6,810 7,330 7,430 4,210 2,680 2,610 3,470 7,200 9,750
18 9,110 7,510 6,700 7,030 7,450 7,220 4,050 2,620 2,620 3,590 7,500 9,510
19 9,000 7,680 6,790 6,990 7,460 7,150 3,980 2,630 2,560 3,670 7,720 9,440
20 8,990 7,740 6,660 7,030 7,630 7,250 3,920 2,620 2,560 3,870 8,050 9,690
21 8,990 7,770 6,550 7,120 7,780 7,080 3,840 2,630 2,600 3,970 8,570 9,570
22 8,880 8,010 6,600 7,160 7,690 6,860 3,800 2,610 2,580 4,030 8,750 9,690
23 8,950 7,870 6,530 6,990 7,620 6,730 3,720 2,590 2,590 4,270 9,230 9,990
24 9,250 8,040 6,450 6,930 7,570 6,630 3,700 2,580 2,590 4,360 10,100 9,590
25 9,440 7,850 6,480 6,810 7,570 6,470 3,630 2,570 2,600 4,660 10,100 9,120
26 9,130 7,760 6,410 6,700 7,520 6,320 3,520 2,560 2,670 4,760 10,100 8,840
27 8,740 7,580 6,390 6,650 7,690 6,240 3,460 2,560 2,740 4,590 10,300 8,980
28 8,730 7,350 6,320 6,750 7,700 6,110 3,410 2,580 2,760 4,750 10,500 9,130
29 8,880 7,530 6,280 6,900 7,580 5,940 3,370 2,610 2,730 4,750 10,200 9,240
30 8,860   6,290 6,920 7,490 5,920 3,360 2,560 2,790 4,760 9,930 9,240
31 8,920   6,270   7,410   3,280 2,550   4,780   8,970