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USGS Surface-Water 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 05471050 South Skunk River at Colfax, IA


Jasper County, Iowa
Hydrologic Unit Code 07080105
Latitude  41°40'53", Longitude  93°14'47" NAD27
Drainage area 803  square miles
Gage datum 770.00 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 1985-10-01 -> 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
1 297 213 433 927 1,100 1,510 1,430 470 717 401 396 333
2 298 209 488 884 1,140 1,420 1,370 405 715 485 369 344
3 278 213 537 787 1,060 1,290 1,180 391 601 516 354 327
4 258 237 574 769 1,060 1,240 1,100 412 517 476 362 308
5 251 231 601 730 1,110 1,310 1,050 388 460 460 356 293
6 248 224 621 701 1,060 1,290 1,130 348 445 435 363 280
7 241 225 610 700 1,070 1,180 1,050 329 505 416 368 273
8 242 236 674 684 1,080 1,230 905 331 485 410 349 268
9 235 257 761 748 1,090 1,230 938 475 430 461 326 259
10 222 309 899 790 1,210 1,250 992 675 403 504 311 254
11 218 347 962 756 1,150 1,290 1,060 847 382 532 295 252
12 211 292 972 812 1,120 1,420 1,170 798 436 566 287 252
13 202 252 1,180 901 1,320 1,500 1,150 905 398 536 296 297
14 209 258 1,310 875 1,240 1,540 977 996 347 533 315 419
15 200 281 1,350 924 1,110 1,650 843 761 305 541 309 456
16 203 284 1,270 932 1,040 1,570 774 632 308 519 314 468
17 228 316 1,110 858 1,080 1,550 747 580 344 470 376 444
18 212 392 1,020 866 1,140 1,650 752 556 382 440 357 381
19 205 507 986 881 1,090 1,780 779 641 379 467 324 335
20 208 597 940 890 1,140 1,830 821 631 374 449 314 316
21 225 603 894 910 1,180 1,680 751 657 434 410 310 306
22 234 585 835 897 1,180 1,680 663 565 429 412 308 296
23 231 521 797 896 1,200 1,560 599 491 457 437 301 296
24 218 490 813 845 1,300 1,490 592 482 471 461 288 297
25 208 450 851 887 1,530 1,420 650 412 503 427 281 304
26 210 409 819 1,030 1,700 1,420 578 408 567 397 271 306
27 205 399 784 1,200 1,720 1,400 521 484 512 371 304 310
28 199 421 758 1,230 1,640 1,340 588 411 454 349 327 358
29 194 636 725 1,160 1,540 1,250 587 525 423 337 326 349
30 192   749 1,050 1,590 1,280 581 607 400 412 334 320
31 202   858   1,610   526 597   425   293