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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 12355000 Flathead River at Flathead British Columbia


000, British Columbia
Hydrologic Unit Code --
Latitude  49°00'04.47", Longitude 114°28'32.39" NAD83
Drainage area 429  square miles
Gage datum 3,968.16 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 1928-10-01 -> 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
1 201 182 179 301 1,940 4,050 1,690 501 298 324 363 296
2 197 183 177 309 2,020 4,050 1,600 488 299 313 356 325
3 197 181 176 322 2,100 4,120 1,530 478 295 299 349 304
4 199 182 177 339 2,230 4,090 1,460 461 289 292 364 298
5 199 183 180 360 2,380 4,020 1,400 447 286 290 376 282
6 199 185 182 389 2,550 3,950 1,330 435 288 285 388 281
7 199 189 183 413 2,630 3,870 1,270 423 286 282 437 288
8 199 191 185 445 2,690 3,700 1,220 414 283 282 442 271
9 197 188 185 481 2,800 3,530 1,160 415 282 283 386 270
10 198 181 187 524 2,880 3,360 1,110 406 277 286 387 273
11 192 179 190 552 2,980 3,260 1,060 397 275 283 436 270
12 192 176 194 583 3,110 3,180 1,020 389 272 283 396 268
13 191 173 198 611 3,310 3,180 999 380 271 284 445 262
14 188 172 199 656 3,370 3,180 986 371 270 288 422 256
15 187 172 212 694 3,400 3,070 936 363 271 306 423 253
16 190 173 230 748 3,540 3,030 882 355 271 321 399 246
17 198 171 223 801 3,670 3,070 843 350 274 326 360 242
18 196 171 223 906 3,810 2,990 812 343 281 324 339 238
19 196 171 227 962 3,860 2,810 783 334 284 335 328 233
20 201 171 228 1,030 3,960 2,750 749 330 285 355 327 233
21 202 171 228 1,120 4,040 2,640 718 329 287 345 323 228
22 198 172 228 1,240 4,140 2,480 688 322 287 337 312 228
23 197 174 229 1,320 4,200 2,370 661 322 284 333 310 221
24 197 173 233 1,430 4,240 2,280 639 324 282 326 318 217
25 196 175 247 1,510 4,260 2,170 620 320 282 342 310 219
26 191 188 255 1,550 4,330 2,070 603 317 290 360 303 225
27 187 185 256 1,560 4,310 1,990 583 312 286 358 304 233
28 182 181 267 1,660 4,200 1,880 565 305 281 384 304 234
29 180 173 280 1,780 4,130 1,800 551 300 280 391 297 223
30 181   286 1,860 4,120 1,760 538 299 294 374 289 213
31 183   297   4,120   521 300   364   207