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USGS Daily Statistics for Washington

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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 12031000 CHEHALIS RIVER AT PORTER, WA


Grays Harbor County, Washington
Hydrologic Unit Code 17100103
Latitude  46°56'22", Longitude 123°18'47" NAD27
Drainage area 1,294  square miles
Gage datum 0 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 63 - 64 years of record in, ft3/s   (Calculation Period 1952-10-01 -> 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 8,230 9,630 6,900 6,360 3,200 1,640 859 437 460 844 2,830 7,770
2 8,030 9,260 6,830 5,840 3,070 1,660 834 435 453 877 2,900 8,640
3 7,940 8,790 6,810 5,430 2,990 1,710 816 434 458 791 2,920 9,450
4 7,830 8,010 6,910 5,200 2,970 1,650 797 428 462 770 2,940 10,100
5 8,150 7,600 6,960 5,070 3,000 1,560 769 423 456 816 3,090 10,100
6 8,730 7,520 6,940 5,220 2,940 1,480 742 418 471 818 3,060 9,360
7 9,490 7,660 6,960 5,390 2,820 1,450 719 415 497 840 3,330 8,830
8 9,780 7,740 6,910 5,250 2,710 1,450 700 416 475 825 3,460 8,220
9 10,200 8,100 6,970 5,170 2,570 1,410 689 422 455 912 3,520 7,950
10 10,100 7,870 7,440 5,080 2,450 1,400 686 411 461 1,120 3,480 7,890
11 9,980 7,510 7,970 4,890 2,370 1,420 675 399 494 1,120 3,650 8,350
12 9,520 7,340 7,940 4,780 2,280 1,400 661 392 485 1,070 4,060 9,140
13 9,390 7,430 7,800 4,860 2,210 1,380 648 387 475 1,040 4,520 9,490
14 9,220 7,490 7,770 4,970 2,160 1,300 648 385 466 1,050 4,910 9,430
15 9,300 7,480 7,720 5,020 2,140 1,240 638 386 470 1,070 5,360 9,720
16 9,610 7,930 7,760 4,930 2,130 1,210 624 385 495 1,090 5,320 9,690
17 9,940 8,470 7,430 4,740 2,110 1,180 610 385 552 1,130 5,370 9,490
18 10,100 8,840 6,890 4,500 2,060 1,140 589 382 600 1,140 5,670 9,270
19 10,100 9,100 6,450 4,210 2,020 1,110 569 380 609 1,200 6,140 8,850
20 9,920 9,080 6,070 4,120 1,990 1,100 556 379 607 1,330 6,900 8,590
21 9,680 8,990 5,970 4,140 1,970 1,080 545 382 626 1,550 7,260 8,570
22 9,480 8,640 5,930 3,920 1,910 1,060 534 393 617 1,700 7,440 8,630
23 8,950 8,240 5,910 3,810 1,880 1,030 520 393 607 1,790 7,740 8,480
24 9,050 7,960 6,040 3,920 1,840 1,010 508 411 622 1,710 7,910 8,280
25 9,600 7,870 6,200 3,960 1,780 987 494 432 602 1,690 8,520 8,100
26 9,610 7,790 6,190 3,790 1,710 963 483 450 580 1,830 9,230 7,970
27 9,700 7,340 6,100 3,620 1,670 933 474 460 571 2,000 8,920 7,980
28 9,270 7,060 6,060 3,610 1,640 903 467 452 592 2,180 8,430 8,260
29 9,210 7,320 6,030 3,550 1,650 898 458 447 685 2,190 7,820 8,420
30 9,300   6,390 3,360 1,640 886 449 454 805 2,340 7,470 8,570
31 9,460   6,600   1,590   442 466   2,520   8,630