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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 -> 2023-09-30)

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
1 732 724 698 1,520 5,870 11,600 6,660 1,890 965 927 1,180 1,130
2 716 726 700 1,550 6,010 11,500 6,380 1,840 954 937 1,160 1,110
3 704 710 716 1,610 6,300 11,800 6,180 1,780 945 922 1,160 1,170
4 692 703 730 1,700 6,610 12,100 6,010 1,710 924 896 1,180 1,180
5 688 697 729 1,770 6,870 12,100 5,740 1,650 914 897 1,250 1,130
6 696 688 734 1,920 7,280 12,100 5,530 1,600 914 884 1,270 1,070
7 699 683 740 2,040 7,660 11,600 5,300 1,550 908 868 1,340 1,030
8 712 699 746 2,110 7,780 11,600 5,090 1,510 891 854 1,370 978
9 709 731 746 2,190 7,970 11,700 4,840 1,460 886 867 1,270 958
10 706 777 765 2,320 8,200 10,800 4,630 1,430 879 913 1,280 959
11 699 768 775 2,380 8,420 10,500 4,450 1,390 866 949 1,410 962
12 692 751 797 2,470 8,670 10,400 4,240 1,340 862 1,010 1,550 977
13 701 738 846 2,600 9,040 10,400 4,090 1,300 875 986 1,400 960
14 708 726 851 2,770 9,160 10,300 4,000 1,270 850 986 1,350 932
15 722 718 902 2,930 9,350 10,100 3,820 1,240 852 1,020 1,330 910
16 771 714 1,090 3,000 9,780 10,100 3,610 1,240 852 1,070 1,290 887
17 815 712 1,080 3,110 10,300 10,000 3,440 1,220 860 1,090 1,240 876
18 797 702 1,050 3,340 10,700 9,850 3,290 1,190 898 1,060 1,190 854
19 769 701 1,090 3,540 10,900 9,680 3,180 1,150 927 1,070 1,150 833
20 766 706 1,080 3,830 11,000 9,720 3,060 1,130 903 1,090 1,120 822
21 748 722 1,080 4,170 11,100 9,190 2,920 1,120 912 1,100 1,130 831
22 739 736 1,070 4,360 11,300 8,980 2,780 1,100 913 1,100 1,110 830
23 726 729 1,080 4,590 11,500 8,720 2,670 1,100 905 1,080 1,140 845
24 714 713 1,110 4,890 11,600 8,380 2,560 1,090 893 1,060 1,270 845
25 707 719 1,150 5,110 11,600 8,060 2,460 1,100 895 1,080 1,310 839
26 695 730 1,200 5,060 12,000 7,740 2,370 1,100 917 1,130 1,260 836
27 680 715 1,220 5,080 12,000 7,480 2,290 1,080 907 1,120 1,190 872
28 672 701 1,260 5,200 11,800 7,190 2,200 1,050 889 1,110 1,160 845
29 663 633 1,320 5,400 11,700 6,950 2,120 1,030 876 1,130 1,140 801
30 661   1,370 5,640 11,700 6,890 2,050 1,010 880 1,150 1,160 775
31 691   1,460   11,800   1,970 986   1,140   753