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USGS Daily Statistics for Iowa

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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 05460400 Shell Rock River near Rockford, IA


Floyd County, Iowa
Hydrologic Unit Code 07080202
Latitude  43°00'19.4", Longitude  92°55'32.1" NAD83
Drainage area 1,251  square miles
Gage datum 960.20 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 2009-10-01 -> 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
1 457 424 1,210 2,010 2,120 1,880 2,380 864 429 1,300 752 573
2 438 408 1,100 1,830 2,120 1,780 2,050 809 426 1,370 711 539
3 434 389 980 1,720 2,020 1,640 1,810 763 393 1,310 675 528
4 399 388 877 1,720 1,940 1,540 1,610 694 371 1,230 638 513
5 393 387 860 1,740 2,190 1,720 1,460 652 345 1,180 611 494
6 392 380 1,030 1,590 2,350 1,560 1,350 669 325 1,150 604 505
7 391 368 1,360 1,460 2,100 1,410 1,270 610 347 1,080 576 497
8 383 343 1,320 1,370 1,860 1,330 1,150 554 405 1,020 547 470
9 352 317 1,300 1,440 1,720 1,270 1,070 544 466 942 519 442
10 337 333 1,530 1,970 1,650 1,430 1,000 565 425 874 496 444
11 348 372 1,530 2,150 1,600 1,610 946 536 418 824 468 443
12 350 407 1,260 1,970 1,640 1,690 917 508 385 775 463 412
13 339 482 1,200 1,800 1,790 2,990 911 476 362 739 545 403
14 334 578 1,190 1,750 1,700 2,450 1,310 439 341 734 676 657
15 331 613 1,260 1,880 1,610 2,720 1,110 401 319 723 639 1,030
16 329 573 1,380 1,720 1,580 2,390 1,500 373 311 675 593 923
17 329 636 1,700 1,520 1,590 2,240 1,620 356 312 640 569 797
18 328 742 1,750 1,490 1,900 2,270 1,330 355 321 601 573 696
19 326 749 1,610 1,580 1,840 2,470 1,190 364 319 566 589 633
20 344 1,060 1,680 2,060 2,410 2,870 1,110 347 321 537 585 606
21 427 1,610 1,850 2,280 2,310 2,670 1,020 336 317 512 562 596
22 571 1,560 1,770 2,030 2,100 3,060 991 336 306 496 545 569
23 685 1,450 2,270 1,880 1,960 3,700 1,080 358 307 482 543 559
24 643 1,370 1,930 1,810 1,850 3,480 1,130 362 2,150 479 531 577
25 566 1,240 1,730 1,710 1,760 3,270 1,280 344 1,980 476 546 572
26 492 1,150 1,750 1,740 2,070 2,910 1,230 324 1,870 730 541 566
27 453 1,060 1,800 1,830 2,340 2,850 1,100 297 1,750 1,030 615 570
28 452 1,140 1,960 1,890 2,380 2,670 1,030 295 1,630 929 654 546
29 422 2,040 1,990 1,970 2,250 2,480 1,100 409 1,520 878 646 498
30 422   2,160 2,000 2,090 2,460 1,000 433 1,400 834 611 501
31 420   2,090   1,910   935 398   784   478