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USGS Surface-Water Daily Statistics for Idaho

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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 -> 2024-09-30)

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
1 248 298 382 1,060 2,740 2,980 865 238 152 161 249 398
2 241 306 377 1,090 2,800 2,920 823 234 152 160 258 382
3 244 304 380 1,130 2,880 2,880 781 230 150 160 266 372
4 242 302 389 1,170 2,920 2,760 740 222 148 158 291 437
5 235 300 397 1,270 3,000 2,670 696 216 148 157 294 413
6 232 301 409 1,380 3,150 2,580 661 212 147 156 280 373
7 239 318 421 1,490 3,240 2,460 633 207 146 154 294 347
8 267 338 436 1,490 3,260 2,360 602 203 142 157 288 308
9 263 397 431 1,540 3,280 2,270 575 198 141 165 285 326
10 275 366 451 1,590 3,310 2,150 556 192 141 167 283 322
11 265 338 484 1,610 3,310 2,040 532 187 142 171 294 332
12 258 322 510 1,650 3,320 1,980 503 185 142 179 305 322
13 266 316 539 1,680 3,370 1,940 491 182 140 180 316 323
14 267 314 547 1,750 3,400 1,930 488 178 141 184 315 321
15 300 316 587 1,770 3,490 1,870 465 177 149 191 343 315
16 402 325 689 1,740 3,640 1,820 438 177 155 191 321 325
17 408 330 701 1,740 3,710 1,770 415 173 147 189 302 314
18 354 329 682 1,800 3,710 1,690 399 171 154 185 295 302
19 325 339 716 1,840 3,630 1,570 385 166 158 181 283 292
20 309 365 728 1,960 3,570 1,480 370 163 159 180 289 284
21 291 389 716 2,080 3,580 1,420 355 162 161 190 303 280
22 282 386 703 2,140 3,610 1,370 339 162 161 195 305 284
23 278 393 727 2,250 3,590 1,300 326 162 159 204 307 275
24 274 372 763 2,470 3,490 1,220 314 164 156 200 356 262
25 274 374 810 2,530 3,430 1,150 306 164 154 215 426 253
26 268 378 837 2,480 3,380 1,090 301 161 154 218 380 270
27 266 372 847 2,470 3,360 1,060 291 157 154 221 343 300
28 266 370 869 2,510 3,280 1,010 278 155 155 228 317 283
29 268 437 905 2,560 3,160 956 265 152 156 226 342 258
30 277   967 2,630 3,130 924 256 150 156 222 375 252
31 290   1,030   3,070   248 150   237   248