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USGS Daily Statistics for Iowa

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Boating safety tips are available from the U.S. Coast Guard.

NOTE: Station Numbers for Iowa precipitation gages have changed (see list).


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 05462000 Shell Rock River at Shell Rock, IA


Butler County, Iowa
Hydrologic Unit Code 07080202
Latitude  42°42'43", Longitude  92°34'58" NAD27
Drainage area 1,746  square miles
Gage datum 885.34 feet above NGVD29
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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 1953-10-01 -> 2021-09-30)

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
1 584 362 943 2,800 1,950 2,180 2,040 964 1,070 1,080 875 653
2 562 369 1,170 2,690 1,930 1,910 1,840 925 1,080 1,050 864 651
3 537 357 1,120 2,420 1,910 1,780 1,670 893 965 1,040 874 644
4 511 367 1,140 2,350 1,870 1,740 1,550 876 841 1,050 838 630
5 499 374 1,110 2,400 1,920 1,710 1,460 848 853 1,030 810 615
6 484 369 1,090 2,420 1,970 1,720 1,440 850 992 1,040 784 611
7 468 375 1,240 2,350 1,980 1,660 1,520 847 895 1,020 785 604
8 455 402 1,290 2,170 1,900 1,730 1,470 827 858 1,020 785 596
9 444 467 1,310 2,120 1,840 2,530 1,580 863 884 1,070 754 586
10 425 486 1,390 1,980 1,850 2,880 1,640 930 861 1,110 741 567
11 403 429 1,480 1,920 1,950 2,360 1,530 965 835 1,090 764 548
12 400 439 1,620 1,960 1,910 2,050 1,510 959 775 1,070 763 558
13 395 422 1,690 2,080 1,920 2,100 1,400 851 717 1,060 757 586
14 387 443 1,790 2,060 1,960 2,200 1,390 840 732 981 745 618
15 370 466 2,020 2,190 1,900 2,030 1,400 817 715 927 741 646
16 363 485 2,160 2,190 1,770 1,990 1,360 781 769 895 727 648
17 375 492 2,130 2,140 1,730 1,930 1,360 769 840 855 725 620
18 394 554 2,100 2,040 1,880 2,030 1,420 818 854 834 724 597
19 398 634 2,120 1,960 1,980 2,150 1,450 835 862 818 734 581
20 413 718 2,180 2,010 2,000 2,190 1,470 895 1,120 813 748 565
21 428 812 2,210 2,130 1,870 2,240 1,450 901 1,340 832 757 549
22 452 898 2,070 2,100 1,990 2,400 1,290 920 1,470 854 779 536
23 454 885 2,000 1,990 2,180 2,460 1,220 1,070 1,780 898 773 521
24 438 862 2,020 1,910 2,140 2,440 1,180 1,280 1,510 945 745 502
25 416 775 2,070 1,920 2,020 2,310 1,110 1,190 1,270 917 714 498
26 405 716 2,200 1,950 1,930 2,340 1,070 1,200 1,200 871 707 506
27 383 707 2,390 1,890 1,950 2,430 1,080 1,110 1,160 882 695 525
28 378 748 2,590 1,910 2,040 2,290 1,160 1,010 1,100 865 692 612
29 376 1,220 2,520 2,050 2,120 2,070 1,130 1,030 1,110 829 680 646
30 369   2,540 2,000 2,130 2,130 1,060 1,070 1,140 844 659 625
31 367   2,600   2,240   991 1,040   878   619