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USGS Daily Statistics for Montana

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Questions or concerns about USGS data and data products in Montana and Wyoming can be directed to the Wyoming-Montana Water Science Center Data Management Section.


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 12358500 M F Flathead River near West Glacier MT


Flathead County, Montana
Hydrologic Unit Code 17010207
Latitude  48°29'43.86", Longitude 114°00'36.75" NAD83
Drainage area 1,125  square miles
Gage datum 3,128.72 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 1939-10-01 -> 2025-09-30)

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
1 734 729 702 1,520 5,840 11,600 6,640 1,870 975 919 1,160 1,120
2 718 732 703 1,540 5,980 11,500 6,360 1,820 959 928 1,150 1,100
3 705 716 719 1,610 6,260 11,700 6,160 1,760 948 914 1,140 1,150
4 694 708 732 1,700 6,570 12,100 5,990 1,700 925 888 1,170 1,160
5 690 702 732 1,780 6,820 12,000 5,730 1,630 917 890 1,240 1,120
6 697 692 736 1,930 7,240 12,000 5,510 1,580 916 877 1,270 1,070
7 700 687 742 2,050 7,610 11,600 5,280 1,540 909 861 1,340 1,030
8 711 703 747 2,110 7,730 11,600 5,080 1,500 890 846 1,370 987
9 709 733 747 2,190 7,920 11,600 4,830 1,450 885 859 1,270 967
10 705 778 766 2,320 8,150 10,800 4,620 1,410 877 903 1,270 967
11 698 767 776 2,380 8,390 10,500 4,440 1,370 863 939 1,400 968
12 687 751 798 2,470 8,670 10,400 4,230 1,330 859 997 1,530 981
13 695 737 846 2,600 9,060 10,400 4,080 1,290 872 975 1,390 963
14 702 725 850 2,790 9,190 10,300 3,990 1,250 848 974 1,340 935
15 717 716 901 2,970 9,380 10,100 3,800 1,230 850 1,010 1,320 912
16 767 713 1,080 3,040 9,790 10,000 3,600 1,230 848 1,060 1,280 888
17 810 709 1,070 3,150 10,400 9,960 3,420 1,210 856 1,070 1,230 877
18 792 700 1,050 3,360 10,700 9,790 3,280 1,180 893 1,050 1,180 856
19 764 699 1,090 3,550 10,900 9,620 3,150 1,140 923 1,050 1,140 836
20 760 704 1,090 3,830 11,000 9,660 3,020 1,120 899 1,070 1,120 824
21 742 719 1,090 4,160 11,000 9,130 2,890 1,110 907 1,080 1,120 833
22 735 733 1,080 4,350 11,300 8,920 2,740 1,090 907 1,080 1,110 833
23 721 726 1,090 4,570 11,500 8,670 2,640 1,090 898 1,070 1,140 848
24 711 713 1,120 4,870 11,500 8,340 2,530 1,090 886 1,050 1,260 848
25 704 720 1,160 5,090 11,500 8,020 2,430 1,090 887 1,070 1,300 842
26 691 732 1,210 5,040 11,900 7,700 2,340 1,090 910 1,120 1,240 837
27 676 716 1,230 5,060 11,900 7,450 2,260 1,060 899 1,100 1,170 872
28 669 702 1,260 5,180 11,800 7,170 2,170 1,040 882 1,100 1,150 846
29 661 650 1,320 5,390 11,600 6,930 2,090 1,020 869 1,120 1,130 803
30 663   1,370 5,620 11,700 6,860 2,030 1,000 872 1,130 1,140 777
31 695   1,460   11,700   1,950 1,000   1,130   755