Peakflow Forecasts Header

HENRYS FORK--AT REXBURG
   State:  Idaho    County:  MADISON
   Latitude:  43 49' 32" North    Longitude:  111 54' 18" West
   Elevation:  4806 feet
   Supporting WFO:  Pocatello    
   Action Stage:  9'   Flood Stage:  9.5'   Moderate Flood Stage:  11.5'
   Major Flood Stage:  
13'

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.

HENRYS FORK--AT REXBURG   (REXI1)
Forecasts for Water Year
2025
Ensemble Date: 2025-07-08
Forecast Period: July 8 to November 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 4.41 1684 2025-09-18
90 % 4.74 1901 2025-09-27
70 % 4.90 2009 2025-10-12
50 % 5.10 2144 2025-10-20
30 % 5.40 2345 2025-10-28
10 % 5.78 2599 2025-11-01
05 % 6.71 3390 2025-11-01

Peakflow exceedence plot for REXI1

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