Idaho river flood stages
National Weather Service flood categories for 16 of 25 Idaho gauges on Flowcast, with NWS's latest observed stage. NWS defines flood stage (minor flooding) at 15 of them. No gauge is at action stage or higher in NWS's latest observations (11 with a current observation).
Updated Nov 4, 9:17 AM PST · USGS data, provisional
| River gauge | Action stage | Minor flood stage | Moderate flood stage | Major flood stage | NWS latest stage | NWS category now | Distance to next category |
|---|---|---|---|---|---|---|---|
| Silver Creek at Sportsman Access, near Picabo NWS PBOI1 | 7.9 ft 284 cfs | 8.3 ft 365 cfs | – | – | 6.75 ft Nov 4, 7:45 AM PST | No flooding | 1.15 ft below action stage |
| Teton River above South Leigh Creek, near Driggs NWS DGGI1 | 3.8 ft 1,500 cfs | 4.2 ft 1,790 cfs | 6 ft 3,250 cfs | 7 ft | 1.96 ft Nov 4, 8:00 AM PST | No flooding | 1.84 ft below action stage |
| Henrys Fork at St. Anthony NWS ANTI1 | 6.5 ft 7,790 cfs | 7 ft 9,070 cfs | 8.2 ft 12,200 cfs | 11 ft | 3.49 ft Nov 4, 7:45 AM PST | No flooding | 3.01 ft below action stage |
| Teton River near St. Anthony NWS TEAI1 | 5.5 ft 3,830 cfs | 6 ft 4,730 cfs | 6.5 ft 5,750 cfs | 7 ft 6,900 cfs | 2.31 ft Nov 4, 8:15 AM PST | No flooding | 3.19 ft below action stage |
| Big Wood River at Hailey (total flow) NWS HALI1 | 5 ft 2,181 cfs | 6 ft 3,160 cfs | 7 ft 4,342 cfs | 8 ft 5,733 cfs | 1.73 ft Nov 4, 7:45 AM PST | No flooding | 3.27 ft below action stage |
| Snake River near Heise NWS HEII1 | 6.25 ft 16,100 cfs | 8 ft 23,900 cfs | 9.5 ft 31,400 cfs | 11 ft 39,800 cfs | 1.76 ft Nov 4, 8:30 AM PST | No flooding | 4.49 ft below action stage |
| Snake River near Irwin NWS PALI1 | 11 ft 20,688 cfs | – | – | – | 4.43 ft Nov 4, 8:30 AM PST | No flooding | 6.57 ft below action stage |
| St. Joe River at Calder NWS CLDI1 | 12 ft | 13 ft | 15 ft | 16 ft | 5.19 ft Nov 4, 8:30 AM PST | No flooding | 6.81 ft below action stage |
| Snake River at Neeley NWS AMFI1 | 8.9 ft 26,917 cfs | 9.5 ft 31,000 cfs | – | – | 2.06 ft Nov 4, 8:30 AM PST | No flooding | 6.84 ft below action stage |
| Coeur d'Alene River near Cataldo NWS CTLI1 | 42 ft | 43 ft | 46 ft | 50 ft | 32.6 ft Nov 4, 8:15 AM PST | No flooding | 9.4 ft below action stage |
| Clearwater River at Spalding NWS SPDI1 | 17 ft | 18 ft | 19 ft | 19.4 ft | 3.26 ft Nov 4, 8:00 AM PST | No flooding | 13.74 ft below action stage |
| Boise River at Glenwood Bridge, near Boise NWS BIGI1 | 9.7 ft 6,500 cfs | 10.1 ft 7,000 cfs | 12.9 ft 11,000 cfs | – | not current | – | – |
| Lemhi River near Lemhi NWS LERI1 | 6 ft | 6.5 ft | 8.5 ft | 10 ft | not current | – | – |
| Salmon River at Salmon NWS SMNI1 | 7 ft | 7.5 ft | 8.5 ft | 9.5 ft | not current | – | – |
| Salmon River at White Bird NWS WHBI1 | 30 ft | 32 ft | 33 ft | 35 ft | not current | – | – |
| South Fork Clearwater River at Stites NWS STII1 | 7.5 ft | 8 ft | 11 ft | – | not current | – | – |
Stages and categories are the National Weather Service's own (National Water Prediction Service gauge data), shown only for gauges whose NWS forecast point lists the same USGS gauge number. Stages are in feet on each point's own NWS datum, so compare a stage only with the categories in the same row. “Distance to next category” is NWS's next category stage minus NWS's latest observed stage; NWS observations older than 6 hours are not shown. Flood categories describe flooding impacts, not fishing or boating safety; low water can be dangerous too. Flowcast's Fishable/Floatable status is never based on them. All states.