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USGS Daily Statistics for Montana

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Questions or concerns about USGS streamflow data in Montana and Wyoming can be directed to Kirk Miller (kmiller@usgs.gov; 307-775-9168).


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 12359800 S F Flathead R ab Twin C nr Hungry Horse MT


Flathead County, Montana
Hydrologic Unit Code 17010209
Latitude  47°58'44.75", Longitude 113°33'38.46" NAD83
Drainage area 1,159  square miles
Gage datum 3,575 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 1964-10-01 -> 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
1 479 832 474 1,300 4,640 9,800 5,060 1,070 545 554 632 468
2 446 771 467 1,320 4,750 9,840 4,740 1,030 539 545 638 507
3 436 674 467 1,320 4,920 10,200 4,540 1,000 527 538 646 567
4 427 601 463 1,340 5,220 10,200 4,420 963 513 526 656 604
5 423 551 472 1,390 5,500 10,200 4,270 924 507 513 673 587
6 424 514 502 1,490 5,780 10,400 4,070 892 509 502 657 547
7 425 487 504 1,580 6,040 10,400 3,850 865 514 495 640 514
8 422 471 504 1,660 6,170 9,970 3,630 840 511 495 899 488
9 424 452 506 1,810 6,330 9,640 3,410 811 530 504 796 478
10 415 451 511 1,960 6,480 9,140 3,190 785 531 510 621 494
11 397 451 509 2,040 6,600 8,570 3,010 762 519 518 603 511
12 394 453 504 2,120 6,680 8,120 2,860 740 528 530 670 488
13 402 465 507 2,240 7,020 8,150 2,740 724 542 535 740 443
14 423 479 517 2,320 7,550 8,200 2,650 709 523 538 723 430
15 459 484 518 2,350 7,820 8,080 2,490 699 528 551 702 441
16 546 491 526 2,270 8,280 8,170 2,320 698 541 557 695 433
17 652 501 573 2,280 8,710 8,150 2,190 690 544 574 688 457
18 618 494 613 2,370 8,970 7,960 2,070 672 578 566 658 461
19 575 485 625 2,440 9,070 7,680 1,970 651 610 555 632 461
20 542 486 607 2,620 9,110 7,480 1,880 636 593 549 608 454
21 519 492 601 2,940 9,170 7,230 1,760 629 586 560 605 457
22 508 521 596 3,250 9,600 7,260 1,660 617 587 572 591 483
23 494 509 629 3,640 9,790 7,140 1,580 607 578 574 568 514
24 478 502 662 3,980 9,790 6,850 1,490 608 569 572 584 531
25 475 492 664 4,200 9,710 6,540 1,430 601 563 577 647 529
26 467 485 660 4,150 9,930 6,220 1,370 587 560 600 646 563
27 458 476 827 4,120 10,000 5,890 1,310 572 553 603 597 693
28 449 474 873 4,160 10,000 5,570 1,260 562 543 626 568 680
29 449 538 905 4,370 10,100 5,430 1,200 559 528 659 564 598
30 484   979 4,530 10,100 5,390 1,150 551 522 650 615 545
31 727   1,070   9,930   1,110 548   610   513