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USGS Daily Statistics for Michigan

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NOTE: During winter months, stage and discharge may be significantly affected by backwater from ice, resulting in incorrect discharge data. Consequently, discharge data may not be displayed during periods of ice effect. Click here for more information.

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 04114000 GRAND RIVER AT PORTLAND, MI


Ionia County, Michigan
Hydrologic Unit Code 04050004
Latitude  42°51'23", Longitude  84°54'44" NAD27
Drainage area 1,385  square miles
Gage datum 704.52 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 1951-10-01 -> 2025-09-30)

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 1,270 1,150 1,620 2,240 1,830 1,150 941 560 446 549 707 1,030
2 1,210 1,130 1,670 2,220 1,800 1,130 874 544 439 568 733 1,040
3 1,160 1,100 1,750 2,190 1,740 1,100 848 530 428 581 772 1,020
4 1,130 1,060 1,840 2,200 1,680 1,060 791 522 436 565 762 1,010
5 1,130 1,030 1,990 2,200 1,600 1,030 789 524 424 553 783 983
6 1,120 1,030 2,020 2,210 1,510 1,010 753 520 399 575 823 961
7 1,100 1,030 2,020 2,230 1,460 1,010 718 513 401 603 789 956
8 1,110 1,050 2,010 2,180 1,410 1,020 729 510 416 604 768 956
9 1,100 1,070 2,040 2,130 1,390 1,030 731 517 461 591 749 957
10 1,100 1,170 2,060 2,080 1,440 1,010 728 514 459 586 762 928
11 1,120 1,190 2,080 2,040 1,500 1,000 719 541 445 574 768 925
12 1,140 1,200 2,150 2,050 1,550 957 703 528 431 561 749 924
13 1,220 1,170 2,210 1,990 1,570 947 720 519 419 550 749 964
14 1,250 1,120 2,280 1,910 1,600 1,000 710 525 451 558 746 951
15 1,190 1,110 2,310 1,860 1,630 1,010 670 520 517 598 762 997
16 1,120 1,110 2,290 1,830 1,680 968 617 527 533 585 792 979
17 1,070 1,190 2,240 1,820 1,650 915 583 540 544 621 801 954
18 1,050 1,320 2,170 1,780 1,660 971 536 555 514 647 818 939
19 1,030 1,370 2,120 1,830 1,660 982 546 521 517 647 842 916
20 1,040 1,490 2,070 1,930 1,630 1,030 548 522 502 640 847 894
21 1,040 1,650 2,060 2,000 1,610 1,010 544 543 503 632 848 890
22 1,060 1,710 2,060 1,960 1,550 1,000 558 508 492 617 844 902
23 1,110 1,710 2,070 1,940 1,450 1,000 532 495 534 623 836 887
24 1,170 1,680 2,090 1,930 1,390 1,000 541 477 527 662 848 916
25 1,200 1,630 2,070 1,890 1,280 1,010 550 480 504 679 861 937
26 1,180 1,600 2,090 1,900 1,250 1,050 525 444 489 669 850 936
27 1,160 1,570 2,060 1,870 1,210 1,060 503 446 484 683 854 949
28 1,140 1,590 2,070 1,870 1,210 1,020 534 459 485 677 944 1,010
29 1,130 1,390 2,140 1,850 1,190 1,000 586 471 478 671 972 1,050
30 1,150   2,150 1,810 1,170 966 593 445 495 673 1,010 1,110
31 1,180   2,210   1,170   591 446   672   1,240