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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 12389500 Thompson River near Thompson Falls MT


Sanders County, Montana
Hydrologic Unit Code 17010213
Latitude  47°35'30.69", Longitude 115°13'46.33" NAD83
Drainage area 638  square miles
Gage datum 2,429.97 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
1 174 222 263 525 1,010 1,320 570 267 196 175 178 214
2 176 215 258 539 1,020 1,300 550 264 196 175 179 216
3 177 212 260 550 1,050 1,300 533 260 194 174 181 219
4 174 210 262 560 1,080 1,280 516 256 192 175 184 223
5 174 216 263 573 1,120 1,250 499 253 191 173 182 222
6 176 215 271 611 1,150 1,220 483 249 190 172 182 211
7 180 217 276 655 1,180 1,190 469 247 189 172 187 201
8 188 226 281 672 1,190 1,180 453 242 188 173 188 194
9 188 278 285 692 1,210 1,180 440 239 187 173 186 193
10 191 279 298 710 1,240 1,100 428 236 186 173 186 193
11 187 258 303 712 1,260 1,040 417 233 185 174 187 195
12 183 247 311 719 1,280 1,010 405 231 185 178 194 197
13 185 239 325 727 1,290 1,010 396 229 184 178 199 199
14 187 237 331 754 1,300 1,000 389 226 183 176 193 203
15 201 233 349 768 1,320 972 377 225 183 175 187 203
16 248 239 381 760 1,380 956 366 224 184 175 187 197
17 248 243 389 758 1,410 939 357 221 182 173 187 194
18 231 239 393 768 1,420 911 349 218 183 172 186 193
19 218 241 419 775 1,410 874 342 216 184 172 183 188
20 213 257 413 815 1,400 847 334 215 183 171 183 185
21 206 277 408 872 1,390 817 326 214 182 172 187 185
22 203 276 405 896 1,410 793 319 212 181 174 188 185
23 200 267 413 919 1,410 766 312 211 180 174 192 186
24 196 258 419 985 1,400 739 306 209 178 174 205 186
25 200 257 422 1,010 1,400 713 301 207 177 175 220 184
26 196 258 433 990 1,410 683 295 205 176 178 218 186
27 194 259 445 977 1,410 655 289 204 176 177 206 189
28 195 263 452 990 1,390 631 283 203 175 178 198 185
29 193 311 460 992 1,360 612 278 200 174 177 201 179
30 200   474 996 1,360 593 274 198 174 175 214 177
31 220   504   1,340   270 197   177   175