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USGS Daily Statistics for Montana

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Questions or concerns about USGS data and data products in Montana and Wyoming can be directed to the Wyoming-Montana Water Science Center Data Management Section.


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 -> 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
1 249 298 380 1,060 2,750 3,020 875 242 152 162 250 355
2 241 306 371 1,090 2,800 2,960 832 237 154 162 260 336
3 244 301 373 1,140 2,880 2,910 789 233 152 162 269 349
4 242 297 381 1,180 2,900 2,780 746 225 150 160 296 427
5 235 296 390 1,290 2,970 2,680 701 219 149 160 292 405
6 232 297 404 1,400 3,080 2,590 667 215 149 159 278 342
7 238 316 419 1,510 3,170 2,480 638 210 148 157 295 311
8 268 337 436 1,510 3,230 2,390 608 205 144 160 291 287
9 264 399 433 1,570 3,280 2,300 581 199 144 168 289 313
10 277 367 455 1,610 3,340 2,160 562 194 143 170 287 314
11 266 339 488 1,620 3,350 2,040 539 189 144 175 300 326
12 260 323 515 1,660 3,360 1,980 509 187 144 183 311 317
13 269 317 545 1,700 3,420 1,930 498 184 142 184 316 319
14 270 315 553 1,780 3,450 1,870 494 180 143 188 309 318
15 304 318 594 1,810 3,540 1,810 472 179 151 196 307 314
16 410 329 698 1,790 3,680 1,790 444 180 157 195 304 325
17 415 334 710 1,780 3,750 1,760 421 175 149 194 295 314
18 359 333 689 1,840 3,740 1,680 405 172 157 189 293 303
19 328 342 721 1,880 3,670 1,560 391 168 160 185 282 293
20 311 369 728 2,010 3,620 1,480 375 165 161 184 290 284
21 292 394 710 2,130 3,650 1,420 360 164 164 195 305 279
22 281 392 697 2,200 3,690 1,370 344 163 163 200 308 283
23 277 401 723 2,320 3,670 1,300 331 163 161 208 310 273
24 273 378 758 2,540 3,560 1,220 319 166 159 204 362 261
25 274 379 807 2,600 3,480 1,160 310 165 157 219 436 253
26 268 381 835 2,530 3,430 1,100 306 163 157 223 388 271
27 266 375 846 2,510 3,400 1,060 296 159 157 226 349 302
28 267 372 864 2,560 3,310 1,010 282 156 157 233 318 284
29 268 429 895 2,590 3,180 963 269 154 158 224 340 258
30 277   958 2,650 3,170 933 260 151 158 217 369 252
31 290   1,020   3,110   251 150   236   249