Peakflow Forecasts Header

LEMHI--NEAR LEMHI
   State:  Idaho    County:  LEMHI
   Latitude:  44 56' 24" North    Longitude:  113 38' 16" West
   Elevation:  4960 feet
   Supporting WFO:  Missoula    
   Action Stage:  6'   Flood Stage:  6.5'   Moderate Flood Stage:  8.5'
   Major 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.

LEMHI--NEAR LEMHI   (LERI1)
Forecasts for Water Year
2025
Ensemble Date: 2025-06-30
Forecast Period: June 30 to October 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 3.78 170 2025-06-30
90 % 3.78 170 2025-06-30
70 % 3.78 170 2025-06-30
50 % 3.78 170 2025-06-30
30 % 3.81 179 2025-08-04
10 % 4.07 245 2025-09-30
05 % 4.34 320 2025-10-01

Peakflow exceedence plot for LERI1

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