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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 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 18 - 45 years of record in, ft3/s   (Calculation Period 1964-10-01 -> 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
1 479 832 474 1,320 4,560 9,690 5,140 1,080 551 561 632 468
2 446 771 467 1,340 4,710 9,760 4,810 1,040 545 552 638 507
3 436 674 467 1,340 4,890 10,100 4,600 1,010 534 542 646 567
4 427 601 463 1,360 5,140 10,100 4,490 974 520 530 656 604
5 423 551 472 1,410 5,370 10,100 4,350 934 514 516 673 587
6 424 514 502 1,510 5,640 10,400 4,140 902 517 504 657 547
7 425 487 504 1,600 5,850 10,400 3,900 875 521 498 640 514
8 422 471 504 1,680 5,940 10,000 3,670 850 518 494 899 488
9 424 452 506 1,830 6,070 9,690 3,450 820 527 497 796 478
10 415 451 511 1,980 6,200 9,170 3,230 793 525 506 621 494
11 397 451 509 2,070 6,330 8,640 3,050 768 515 515 603 511
12 394 453 504 2,150 6,440 8,200 2,890 744 527 529 670 488
13 402 465 507 2,270 6,770 8,260 2,770 729 543 534 740 443
14 423 479 517 2,360 7,270 8,300 2,690 714 525 538 723 430
15 459 484 518 2,390 7,480 8,180 2,520 704 531 553 702 441
16 546 491 526 2,300 7,910 8,290 2,350 704 545 560 695 433
17 652 501 573 2,310 8,370 8,260 2,210 694 550 578 688 457
18 618 494 613 2,390 8,730 8,080 2,090 676 586 570 658 461
19 575 485 625 2,460 8,940 7,790 1,990 656 619 559 632 461
20 542 486 607 2,580 9,060 7,590 1,900 641 601 553 608 454
21 519 492 601 2,860 9,120 7,340 1,780 634 595 565 605 457
22 508 521 596 3,190 9,560 7,360 1,680 621 596 577 591 483
23 494 509 629 3,590 9,720 7,240 1,600 612 588 577 568 514
24 478 502 662 3,920 9,710 6,940 1,510 614 578 575 584 531
25 475 492 664 4,130 9,600 6,620 1,440 608 572 582 647 529
26 467 485 660 4,070 9,760 6,290 1,380 593 568 601 646 563
27 458 476 827 4,020 9,850 5,960 1,320 577 560 600 597 693
28 449 474 873 4,010 9,900 5,650 1,270 567 549 622 568 680
29 449 538 905 4,190 9,990 5,510 1,210 565 534 657 564 598
30 484   979 4,400 10,000 5,480 1,170 557 528 649 615 545
31 727   1,080   9,820   1,130 555   610   513