Peakflow Forecasts Header

LITTLE SALMON--AT RIGGINS
   State:  Idaho    County:  IDAHO
   Latitude:  45 24' 47" North    Longitude:  116 19' 28" West
   Elevation:  1760 feet
   Supporting WFO:  Missoula    
   Action Stage:  9'   Flood Stage:  10'

Forecasts are calculated from a forecast time series that approximates flow at a 6 hour time step interval. Observed instantaneous peaks can be higher than model forecast peaks.

LITTLE SALMON--AT RIGGINS   (RIGI1)
Forecasts for Water Year
2027
Ensemble Date: 2026-10-10
Forecast Period: October 10 to February 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 2.40 155 2026-10-11
90 % 2.53 188 2026-10-22
70 % 2.72 246 2026-10-31
50 % 2.96 333 2026-11-06
30 % 3.26 453 2026-12-05
10 % 3.97 799 2027-01-19
05 % 4.84 1365 2027-01-25

Peakflow exceedence plot for RIGI1

 Click to download runoff traces used in forecast.  Click for comma delimited data used in plot.csv icon