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USGS Daily Statistics for Montana

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Questions or concerns about USGS streamflow data in Montana and Wyoming can be directed to Kirk Miller (kmiller@usgs.gov; 307-775-9168).

Updated June 11, 2020 - USGS water-resources monitoring activities will be restored at the following sites:
  • 12323600 Silver Bow Creek at Opportunity, Montana (POR: 31 years)
  • 12323750 Silver Bow Creek at Warm Springs, Montana (POR: 35 years)

Updated May 12, 2020 - USGS water-resources monitoring activities were suspended effective June 1, 2020 at the following site:
  • 06088500 Muddy Creek near Vaughn, Montana (POR: 82 years)
USGS monitoring activities at this site was funded by our partner and USGS Cooperative Matching Funds (06088500). Lack of partner funding for this site resulted in suspension of all USGS monitoring activities. Efforts are ongoing to secure funding for future monitoring. Historical data will continue to be available from USGS.

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 12304500 Yaak River near Troy MT


Lincoln County, Montana
Hydrologic Unit Code 17010103
Latitude  48°33'42.20", Longitude 115°58'12.57" NAD83
Drainage area 792  square miles
Gage datum 1,839 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 1956-10-01 -> 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
1 250 300 384 1,070 2,750 3,020 875 242 153 163 252 359
2 242 307 374 1,100 2,800 2,960 832 238 154 163 262 339
3 244 302 377 1,150 2,880 2,910 789 234 152 163 271 353
4 242 299 384 1,190 2,900 2,780 746 226 151 161 299 431
5 235 297 393 1,290 2,970 2,680 701 220 150 161 294 408
6 232 298 408 1,400 3,080 2,590 667 215 150 160 276 344
7 239 318 423 1,520 3,170 2,480 638 211 149 158 294 313
8 269 340 440 1,520 3,230 2,390 608 205 145 161 292 288
9 265 404 437 1,580 3,280 2,300 581 200 145 170 291 316
10 278 372 459 1,630 3,340 2,160 562 194 144 172 289 316
11 267 343 493 1,630 3,350 2,040 539 189 145 175 302 329
12 261 326 520 1,680 3,360 1,980 509 188 144 183 313 320
13 267 320 550 1,710 3,420 1,930 498 185 143 184 319 322
14 266 318 559 1,800 3,450 1,870 495 181 144 188 311 321
15 302 321 600 1,810 3,540 1,810 472 180 152 196 310 316
16 411 331 705 1,790 3,680 1,790 445 181 158 196 306 328
17 417 336 717 1,780 3,750 1,760 422 176 150 193 297 317
18 359 335 695 1,840 3,740 1,680 406 173 158 189 293 306
19 329 345 727 1,880 3,670 1,560 392 168 161 185 281 295
20 311 372 733 2,010 3,620 1,480 376 166 162 185 290 286
21 293 398 715 2,130 3,650 1,420 361 164 165 195 306 281
22 283 396 702 2,200 3,690 1,370 345 164 165 200 310 285
23 279 405 728 2,320 3,670 1,300 332 164 162 210 312 275
24 275 382 764 2,540 3,560 1,220 319 166 160 205 365 262
25 275 383 814 2,600 3,480 1,160 311 166 157 221 440 254
26 269 385 843 2,530 3,430 1,100 306 164 157 224 392 272
27 267 378 854 2,510 3,400 1,060 297 160 157 228 352 304
28 268 376 872 2,560 3,310 1,010 283 157 158 235 321 286
29 269 429 901 2,590 3,180 963 270 155 158 225 343 260
30 278   966 2,650 3,170 933 261 152 159 219 372 254
31 292   1,030   3,110   252 151   238   250