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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 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 -> 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
1 171 216 260 512 1,000 1,290 557 261 193 173 176 211
2 173 212 260 524 1,020 1,270 537 259 192 172 177 212
3 174 208 264 534 1,050 1,270 521 254 190 172 178 215
4 172 207 267 546 1,070 1,260 504 251 189 172 181 218
5 172 212 265 559 1,110 1,220 487 248 188 170 181 217
6 173 211 272 593 1,150 1,190 472 244 187 170 181 207
7 178 212 275 634 1,180 1,160 458 242 186 169 187 198
8 185 221 278 650 1,190 1,150 443 238 185 170 187 192
9 185 268 280 670 1,190 1,150 429 234 184 170 184 191
10 188 269 291 688 1,210 1,070 418 231 183 170 184 191
11 184 250 296 694 1,230 1,020 407 229 182 171 185 192
12 180 239 303 700 1,250 990 395 226 182 175 191 194
13 183 231 316 706 1,260 983 387 224 181 175 196 195
14 186 229 321 730 1,270 976 380 222 180 173 192 200
15 199 226 338 745 1,290 948 368 220 181 173 187 199
16 243 231 369 737 1,340 931 358 220 181 172 187 193
17 243 234 377 735 1,380 914 349 216 179 171 186 190
18 227 231 381 745 1,390 888 341 214 180 170 186 188
19 215 233 407 752 1,380 851 334 211 181 170 184 185
20 210 248 402 789 1,370 825 326 210 181 169 183 182
21 204 267 399 841 1,360 795 318 210 179 169 186 181
22 200 265 396 865 1,370 771 312 208 179 171 187 182
23 197 257 403 887 1,370 745 305 207 178 172 190 183
24 193 249 410 950 1,370 718 299 205 176 171 202 182
25 196 248 413 978 1,370 693 295 203 175 172 216 180
26 192 250 424 959 1,380 664 289 201 174 174 214 183
27 190 251 435 951 1,380 637 283 200 173 174 203 187
28 189 255 443 965 1,360 614 277 199 173 175 195 183
29 188 294 453 970 1,340 596 273 196 172 175 198 176
30 195   466 983 1,330 578 268 195 172 174 210 175
31 214   493   1,320   264 194   175   173