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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 water year of record in, ft3/s   (Calculation Period 1952-10-01 -> 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 8,230 9,630 6,850 6,290 3,180 1,620 854 435 457 840 2,830 7,770
2 8,030 9,260 6,780 5,780 3,040 1,650 829 434 450 872 2,900 8,640
3 7,940 8,790 6,760 5,380 2,970 1,700 811 432 455 791 2,920 9,450
4 7,830 8,010 6,850 5,150 2,950 1,630 791 427 459 770 2,940 10,100
5 8,150 7,600 6,900 5,020 2,970 1,550 764 421 453 816 3,090 10,100
6 8,730 7,520 6,880 5,170 2,910 1,470 737 416 468 818 3,060 9,360
7 9,490 7,660 6,890 5,350 2,800 1,430 715 414 493 840 3,330 8,830
8 9,780 7,740 6,840 5,230 2,680 1,440 696 414 471 825 3,460 8,220
9 10,200 8,100 6,900 5,150 2,550 1,410 685 420 454 912 3,520 7,950
10 10,100 7,870 7,360 5,070 2,430 1,390 683 410 461 1,120 3,480 7,890
11 9,980 7,510 7,880 4,880 2,350 1,410 673 398 496 1,120 3,650 8,350
12 9,520 7,340 7,860 4,790 2,260 1,390 659 391 486 1,070 4,060 9,140
13 9,390 7,430 7,730 4,880 2,190 1,370 646 387 475 1,040 4,520 9,490
14 9,220 7,490 7,700 4,980 2,140 1,290 645 384 465 1,050 4,910 9,430
15 9,300 7,480 7,650 5,030 2,120 1,230 635 385 471 1,070 5,360 9,720
16 9,610 7,930 7,680 4,930 2,110 1,210 621 383 496 1,090 5,320 9,690
17 9,940 8,470 7,360 4,740 2,100 1,170 608 383 555 1,130 5,370 9,490
18 10,100 8,840 6,830 4,490 2,040 1,130 588 380 605 1,140 5,670 9,270
19 10,100 9,050 6,400 4,200 2,010 1,110 568 378 619 1,200 6,140 8,850
20 9,920 9,040 6,020 4,110 1,980 1,090 555 378 614 1,330 6,900 8,590
21 9,680 8,950 5,930 4,130 1,950 1,070 543 381 629 1,550 7,260 8,570
22 9,480 8,590 5,880 3,900 1,900 1,050 532 392 619 1,700 7,440 8,630
23 8,950 8,190 5,860 3,790 1,860 1,020 518 392 608 1,790 7,740 8,480
24 9,050 7,920 5,990 3,900 1,830 1,000 506 410 623 1,710 7,910 8,280
25 9,600 7,820 6,150 3,930 1,760 979 492 429 603 1,690 8,520 8,100
26 9,610 7,740 6,130 3,760 1,700 956 481 447 581 1,830 9,230 7,970
27 9,700 7,300 6,040 3,600 1,650 927 472 457 571 2,000 8,920 7,980
28 9,270 7,010 6,000 3,580 1,630 898 465 449 591 2,180 8,430 8,260
29 9,210 7,320 5,980 3,520 1,640 893 456 444 683 2,190 7,820 8,420
30 9,300   6,330 3,340 1,630 881 447 451 802 2,340 7,470 8,570
31 9,460   6,530   1,580   441 462   2,520   8,630