Peakflow Forecasts Header

FALL RIVER--NEAR CHESTER
   State:  Idaho    County:  FREMONT
   Latitude:  44 1' 0" North    Longitude:  111 34' 0" West
   Elevation:  5052 feet
   Supporting WFO:  Pocatello    
   Action Stage:  6'   Flood Stage:  6.5'

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.

FALL RIVER--NEAR CHESTER   (CHEI1)
Forecasts for Water Year
2026
Ensemble Date: 2026-05-14
Forecast Period: May 14 to September 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 3.12 1120 2026-05-14
90 % 3.12 1120 2026-05-14
70 % 3.37 1368 2026-05-29
50 % 3.63 1660 2026-06-01
30 % 3.79 1856 2026-06-07
10 % 4.51 2856 2026-06-16
05 % 5.04 3721 2026-06-20

Peakflow exceedence plot for CHEI1

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