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 2026
Ensemble Date: 2026-06-10
 Forecast Period: June 10 to October 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 3.85 177 2026-06-10
90 % 3.85 177 2026-06-10
70 % 3.85 177 2026-06-10
50 % 3.85 177 2026-06-10
30 % 3.85 177 2026-06-10
10 % 4.00 216 2026-07-14
05 % 4.24 287 2026-09-19

Peakflow exceedence plot for LERI1

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