What changed on Idaho rivers this week (Oct 24–Oct 30, 2026)
Between Oct 24 and Oct 30, 5 of the 25 gauges in Idaho rose by 10% or more, 8 fell by 10% or more, and 4 changed status. 4 have no reading at one end of the week (n/a).
Compares the snapshot of Oct 24, 2026, 7:07 PM PDT with the latest, Oct 30, 2026, 11:23 AM PDT. Not a forecast.
Biggest risers
| River | Flow Oct 24 | Flow Oct 30 | Change | Status then → now |
|---|---|---|---|---|
| Coeur d'Alene River near Cataldo, ID | 279 cfs | 430 cfs | +54% | Too low → Fishable/Floatable |
| Lochsa River near Lowell, ID | 415 cfs | 517 cfs | +25% | Fishable/Floatable (same) |
| St. Joe River at Calder, ID | 376 cfs | 451 cfs | +20% | Fishable/Floatable (same) |
| Clearwater River at Spalding, ID | 3,220 cfs | 3,840 cfs | +19% | Fishable/Floatable (same) |
| Snake River at Neeley, ID | 263 cfs | 304 cfs | +16% | Too low (same) |
Biggest fallers
| River | Flow Oct 24 | Flow Oct 30 | Change | Status then → now |
|---|---|---|---|---|
| Henrys Fork near Ashton, ID | 949 cfs | 622 cfs | -34% | Fishable/Floatable → Too low |
| Big Wood River at Hailey (total flow), ID | 206 cfs | 166 cfs | -19% | Fishable/Floatable (same) |
| Henrys Fork at St. Anthony, ID | 1,320 cfs | 1,080 cfs | -18% | Fishable/Floatable (same) |
| Boise River near Twin Springs, ID | 399 cfs | 330 cfs | -17% | Fishable/Floatable (same) |
| Salmon River near Shoup, ID | 1,980 cfs | 1,700 cfs | -14% | Fishable/Floatable (same) |
| Salmon River at Salmon, ID | 1,330 cfs | 1,170 cfs | -12% | Fishable/Floatable (same) |
| South Fork Clearwater River at Stites, ID | 233 cfs | 205 cfs | -12% | Fishable/Floatable (same) |
| Middle Fork Salmon River at Middle Fork Lodge, near Yellow Pine, ID | 583 cfs | 514 cfs | -12% | Fishable/Floatable (same) |
Status changes
| River | Flow Oct 24 | Flow Oct 30 | Change | Status then → now |
|---|---|---|---|---|
| Coeur d'Alene River near Cataldo, ID | 279 cfs | 430 cfs | +54% | Too low → Fishable/Floatable |
| Henrys Fork near Island Park, ID | 89.9 cfs | 84.3 cfs | -6% | Fishable/Floatable → Too low |
| Henrys Fork near Ashton, ID | 949 cfs | 622 cfs | -34% | Fishable/Floatable → Too low |
| Snake River near Irwin, ID | 1,400 cfs | 1,430 cfs | +2% | Too low → Fishable/Floatable |
All 25 Idaho gauges, day by day
Middle columns are each day's snapshot flow in cfs (last run of that day).
| River | Flow Oct 24 | Oct 25 | Oct 26 | Oct 27 | Oct 28 | Oct 29 | Flow Oct 30 | Change | Status then → now |
|---|---|---|---|---|---|---|---|---|---|
| Coeur d'Alene River near Cataldo, ID | 279 cfs | 279 | 279 | 310 | 375 | 423 | 430 cfs | +54% | Too low → Fishable/Floatable |
| Lochsa River near Lowell, ID | 415 cfs | 434 | 415 | 537 | 748 | 576 | 517 cfs | +25% | Fishable/Floatable (same) |
| St. Joe River at Calder, ID | 376 cfs | 360 | 356 | 393 | 545 | 494 | 451 cfs | +20% | Fishable/Floatable (same) |
| Clearwater River at Spalding, ID | 3,220 cfs | 3,450 | 3,310 | 3,240 | 3,520 | 4,010 | 3,840 cfs | +19% | Fishable/Floatable (same) |
| Snake River at Neeley, ID | 263 cfs | 285 | 296 | 320 | 304 | 304 | 304 cfs | +16% | Too low (same) |
| Boise River at Glenwood Bridge, near Boise, ID | 225 cfs | 222 | 249 | 232 | 232 | 239 | 235 cfs | +4% | Fishable/Floatable (same) |
| Snake River near Irwin, ID | 1,400 cfs | 1,430 | 1,430 | 1,460 | 1,430 | 1,450 | 1,430 cfs | +2% | Too low → Fishable/Floatable |
| South Fork Boise River at Anderson Ranch Dam, ID | 295 cfs | 309 | 295 | 295 | 290 | 295 | 300 cfs | +2% | Fishable/Floatable (same) |
| Salmon River at White Bird, ID | 4,090 cfs | 4,610 | 4,470 | 4,300 | 4,270 | 4,170 | 4,140 cfs | +1% | Fishable/Floatable (same) |
| Snake River near Heise, ID | 2,060 cfs | 2,020 | 2,040 | 2,040 | 2,010 | 2,040 | 2,010 cfs | -2% | Fishable/Floatable (same) |
| Silver Creek at Sportsman Access, near Picabo, ID | 100 cfs | 94.9 | 96.6 | 94.9 | 94.9 | 93.2 | 96.6 cfs | -3% | Fishable/Floatable (same) |
| Henrys Fork near Island Park, ID | 89.9 cfs | 87.9 | 87.9 | 86.0 | 87.9 | 84.3 | 84.3 cfs | -6% | Fishable/Floatable → Too low |
| North Fork Payette River near Banks, ID | 267 cfs | 255 | 258 | 261 | 255 | 253 | 250 cfs | -6% | Fishable/Floatable (same) |
| Middle Fork Salmon River at Middle Fork Lodge, near Yellow Pine, ID | 583 cfs | 529 | 529 | 537 | 537 | 522 | 514 cfs | -12% | Fishable/Floatable (same) |
| South Fork Clearwater River at Stites, ID | 233 cfs | 198 | 183 | 198 | 225 | 225 | 205 cfs | -12% | Fishable/Floatable (same) |
| Salmon River at Salmon, ID | 1,330 cfs | 1,260 | 1,250 | 1,210 | 1,220 | 1,200 | 1,170 cfs | -12% | Fishable/Floatable (same) |
| Salmon River near Shoup, ID | 1,980 cfs | 1,920 | 1,840 | 1,790 | 1,780 | 1,730 | 1,700 cfs | -14% | Fishable/Floatable (same) |
| Boise River near Twin Springs, ID | 399 cfs | 342 | 342 | 366 | 346 | 334 | 330 cfs | -17% | Fishable/Floatable (same) |
| Henrys Fork at St. Anthony, ID | 1,320 cfs | 986 | 986 | 1,070 | 1,120 | 1,070 | 1,080 cfs | -18% | Fishable/Floatable (same) |
| Big Wood River at Hailey (total flow), ID | 206 cfs | 183 | 176 | 176 | 172 | 166 | 166 cfs | -19% | Fishable/Floatable (same) |
| Henrys Fork near Ashton, ID | 949 cfs | 615 | 636 | 622 | 622 | 622 | 622 cfs | -34% | Fishable/Floatable → Too low |
| Lemhi River near Lemhi, ID | n/a | 202 | 197 | 191 | 186 | 197 | 191 cfs | n/a | n/a |
| Pahsimeroi River at Ellis, ID | n/a | 211 | 216 | 210 | 208 | 207 | 213 cfs | n/a | n/a |
| Teton River above South Leigh Creek, near Driggs, ID | n/a | 230 | 208 | 226 | 208 | 195 | 195 cfs | n/a | n/a |
| Teton River near St. Anthony, ID | n/a | 414 | 389 | 369 | 365 | 373 | 365 cfs | n/a | n/a |
How this is worked out: on every run Flowcast saves each gauge's latest USGS flow reading and its status; the last run of each day is kept as that day's snapshot (times are when the run finished, not exact reading times). This page compares the oldest snapshot in the last 7 days (Oct 24, 2026, 7:07 PM PDT) with the latest one (Oct 30, 2026, 11:23 AM PDT), about 5.7 days apart. Change is (latest flow − earlier flow) ÷ earlier flow. Rising or falling here means a change of 10% or more either way. “n/a” means the gauge had no snapshot reading at one end (for example it was added to Flowcast later, or had no current reading). Two snapshots can miss peaks in between, USGS readings are provisional, and dam releases can change flow on regulated rivers at any time. This describes the past week only; it is not a forecast. The window moves forward one day each day.
All Idaho rivers · Idaho rivers rising or falling now (24 h) · All states this week · Other states: Oregon · Washington · Montana