Idaho river flow forecasts
National Weather Service flow forecasts for 17 of 25 Idaho gauges on Flowcast: 3 forecast to rise by 10% or more, 8 to drop, 1 to rise and drop, 5 to stay within ±10% of the latest USGS reading.
Updated Nov 3, 9:17 AM PST · USGS data, provisional
| River gauge | Latest USGS cfs | Forecast high, next 3 days | Forecast high, whole forecast | Forecast low | Last forecast value | Outlook | NWS issued |
|---|---|---|---|---|---|---|---|
| St. Joe River at Calder | 360 | 364 (+1%) Fri Nov 6, 4 AM | 640 (+78%) Fri Nov 13, 4 AM | 349 (-3%) Wed Nov 4, 4 PM | 640 (+78%) Fri Nov 13 | Forecast to rise | Nov 3, 8:36 AM PST |
| Middle Fork Salmon River at Middle Fork Lodge, near Yellow Pine | 545 | 552 (+1%) Tue Nov 3, 10 AM | 724 (+33%) Fri Nov 13, 4 AM | 492 (-10%) Sat Nov 7, 10 PM | 724 (+33%) Fri Nov 13 | Forecast to rise | Nov 3, 8:20 AM PST |
| Lochsa River near Lowell | 470 | 464 (-1%) Tue Nov 3, 10 AM | 545 (+16%) Thu Nov 12, 4 AM | 440 (-6%) Fri Nov 6, 4 PM | 545 (+16%) Thu Nov 12 | Forecast to rise | Nov 2, 8:12 AM PST |
| Boise River near Twin Springs | 358 | 358 (+0%) Tue Nov 3, 10 PM | 807 (+125%) Fri Nov 13, 4 AM | 307 (-14%) Tue Nov 10, 10 PM | 807 (+125%) Fri Nov 13 | Forecast to rise and drop | Nov 3, 7:57 AM PST |
| Teton River near St. Anthony | 487 | 492 (+1%) Tue Nov 3, 10 AM | 492 (+1%) Tue Nov 3, 10 AM | 414 (-15%) Wed Nov 11, 10 AM | 432 (-11%) Fri Nov 13 | Forecast to drop | Nov 3, 7:29 AM PST |
| Henrys Fork at St. Anthony | 1,230 | 1,240 (+1%) Tue Nov 3, 10 AM | 1,240 (+1%) Tue Nov 3, 10 AM | 986 (-20%) Thu Nov 12, 10 AM | 1,030 (-16%) Fri Nov 13 | Forecast to drop | Nov 3, 7:29 AM PST |
| Big Wood River at Hailey (total flow) | 185 | 185 (+0%) Tue Nov 3, 10 AM | 185 (+0%) Tue Nov 3, 10 AM | 157 (-15%) Fri Nov 6, 10 PM | 170 (-8%) Fri Nov 13 | Forecast to drop | Nov 3, 7:39 AM PST |
| Coeur d'Alene River near Cataldo | 323 | 323 (+0%) Tue Nov 3, 10 AM | 323 (+0%) Tue Nov 3, 10 AM | 279 (-14%) Sun Nov 8, 4 AM | 279 (-14%) Fri Nov 13 | Forecast to drop | Nov 3, 8:36 AM PST |
| Teton River above South Leigh Creek, near Driggs | 263 | 263 (+0%) Tue Nov 3, 10 AM | 263 (+0%) Tue Nov 3, 10 AM | 226 (-14%) Thu Nov 12, 10 PM | 226 (-14%) Fri Nov 13 | Forecast to drop | Nov 3, 7:29 AM PST |
| Snake River near Heise | 1,610 | 1,560 (-3%) Tue Nov 3, 10 AM | 1,560 (-3%) Tue Nov 3, 10 AM | 1,320 (-18%) Thu Nov 12, 4 PM | 1,320 (-18%) Fri Nov 13 | Forecast to drop | Nov 3, 7:39 AM PST |
| South Fork Clearwater River at Stites | 176 | 170 (-3%) Tue Nov 3, 10 AM | 170 (-3%) Tue Nov 3, 10 AM | 150 (-15%) Mon Nov 9, 10 AM | 150 (-15%) Thu Nov 12 | Forecast to drop | Nov 2, 8:12 AM PST |
| Salmon River at White Bird | 4,300 | 4,040 (-6%) Tue Nov 3, 10 AM | 4,040 (-6%) Tue Nov 3, 10 AM | 3,800 (-12%) Tue Nov 10, 10 PM | 3,880 (-10%) Thu Nov 12 | Forecast to drop | Nov 2, 7:24 AM PST |
| Lemhi River near Lemhi | 194 | 208 (+7%) Tue Nov 3, 10 AM | 208 (+7%) Tue Nov 3, 10 AM | 200 (+3%) Fri Nov 6, 4 AM | 200 (+3%) Thu Nov 12 | Forecast within ±10% | Nov 2, 7:24 AM PST |
| Henrys Fork near Island Park | 84.3 | 84.0 (-0%) Tue Nov 3, 10 AM | 86.0 (+2%) Thu Nov 12, 10 PM | 84.0 (-0%) Tue Nov 3, 10 AM | 86.0 (+2%) Fri Nov 13 | Forecast within ±10% | Nov 3, 7:29 AM PST |
| Snake River near Irwin | 912 | 912 (+0%) Tue Nov 3, 10 AM | 925 (+1%) Thu Nov 12, 10 PM | 912 (+0%) Tue Nov 3, 10 AM | 925 (+1%) Fri Nov 13 | Forecast within ±10% | Nov 3, 7:39 AM PST |
| Snake River at Neeley | 304 | 304 (+0%) Tue Nov 3, 10 AM | 304 (+0%) Tue Nov 3, 10 AM | 304 (+0%) Tue Nov 3, 10 AM | 304 (+0%) Fri Nov 13 | Forecast within ±10% | Nov 3, 7:39 AM PST |
| Salmon River at Salmon | 1,280 | 1,230 (-4%) Tue Nov 3, 10 AM | 1,230 (-4%) Tue Nov 3, 10 AM | 1,160 (-9%) Tue Nov 10, 4 PM | 1,160 (-9%) Thu Nov 12 | Forecast within ±10% | Nov 2, 7:24 AM PST |
Forecast values are the National Weather Service's own flow forecasts (NWS River Forecast Centers, via the National Water Prediction Service), shown only for gauges whose NWS forecast point lists the same USGS gauge number, and only when the forecast was issued in the last 36 hours. “Rise” or “drop” means the forecast goes 10% or more above or below the latest USGS reading at some point (the same ±10% rule as the 24-hour trend). Flowcast does not make or adjust forecasts, and the Fishable/Floatable status is never based on them. Each river page shows the day-by-day forecast. All states.