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USGS Daily Statistics for the Nation

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 12388700 Flathead River at Perma MT


Sanders County, Montana
Hydrologic Unit Code 17010212
Latitude  47°22'00.45", Longitude 114°35'06.00" NAD83
Drainage area 9,024  square miles
Contributing drainage area 9,004  square miles
Gage datum 2,469.3 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 water year of record in, ft3/s   (Calculation Period 1983-10-01 -> 2019-09-30)

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 10,600 9,970 9,490 9,420 14,900 24,800 21,500 9,310 7,000 7,990 9,180 9,810
2 10,600 10,100 9,550 9,390 14,900 24,900 20,600 9,150 6,940 8,070 9,360 9,870
3 10,600 9,920 9,590 9,350 15,100 24,900 20,900 8,910 6,770 8,010 9,410 10,100
4 10,500 9,980 9,410 9,400 15,300 24,900 20,200 8,680 6,540 8,200 9,570 10,500
5 10,300 9,880 9,340 9,550 15,400 25,200 19,800 8,480 6,770 8,170 9,530 10,500
6 10,300 9,780 9,370 9,760 15,600 25,700 19,200 8,220 6,860 8,280 9,220 10,600
7 10,400 9,790 9,310 9,770 15,800 26,300 18,300 8,010 6,810 8,170 9,090 10,500
8 10,300 9,790 9,220 9,920 16,100 27,000 17,300 8,000 6,770 8,200 9,030 10,600
9 10,300 9,870 9,200 10,100 16,300 27,600 16,000 7,690 6,850 8,050 9,060 10,800
10 9,930 9,750 9,120 10,100 16,600 27,600 15,100 7,530 7,010 7,970 9,180 10,900
11 9,840 9,720 9,020 10,300 16,900 26,800 14,500 7,400 6,880 7,930 9,360 10,900
12 9,900 9,780 9,150 10,400 17,400 26,300 14,100 7,270 6,860 7,860 9,500 10,800
13 9,740 9,870 9,050 10,600 17,600 26,000 14,000 7,400 6,940 7,860 9,600 10,800
14 9,640 9,790 9,030 10,800 17,800 25,900 13,700 7,300 6,980 7,860 9,630 10,800
15 9,800 9,830 9,070 10,900 18,200 25,300 13,200 7,380 7,110 7,790 9,760 11,000
16 9,990 9,750 9,020 11,000 18,800 25,000 13,000 7,370 7,020 7,750 9,850 11,100
17 10,100 9,750 9,030 11,100 19,200 25,900 13,100 7,240 6,870 7,680 9,810 11,100
18 9,990 9,670 8,920 11,200 19,600 26,000 12,600 7,250 7,050 7,780 9,840 11,100
19 9,880 9,590 9,040 11,400 20,000 25,900 12,000 7,280 7,250 7,780 9,980 10,900
20 9,950 9,670 8,980 11,600 20,200 25,500 11,700 7,310 7,170 7,650 10,000 11,000
21 9,960 9,680 9,010 11,900 20,200 25,100 11,400 7,410 7,290 7,600 10,000 11,100
22 10,100 9,600 9,050 12,100 20,500 25,800 11,000 7,270 7,350 7,680 10,000 10,900
23 10,100 9,420 9,190 12,300 21,000 25,500 11,000 7,220 7,480 7,710 9,930 10,800
24 10,000 9,520 9,160 12,800 21,300 24,500 10,600 7,280 7,660 7,680 9,730 10,800
25 9,990 9,880 9,160 13,100 21,900 23,800 10,400 7,280 7,610 7,850 9,920 10,600
26 9,890 9,760 8,960 13,500 22,600 23,400 10,400 7,360 7,740 8,080 9,940 10,400
27 9,790 9,680 9,090 13,700 23,100 22,800 9,920 7,350 7,860 8,260 9,910 10,600
28 9,730 9,520 9,320 14,000 23,800 22,600 10,200 7,280 7,910 8,240 9,790 10,800
29 9,790 10,300 9,380 14,300 23,700 22,400 9,920 7,180 7,870 8,580 9,830 10,800
30 9,840   9,370 14,800 23,800 21,600 9,780 7,470 7,760 8,740 9,840 10,800
31 9,890   9,300   24,500   9,550 7,160   8,990   10,700