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: 2025-05-14
 Forecast Period: May 14 to September 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 7.73 4643 2025-05-21
90 % 7.73 4643 2025-05-21
70 % 7.75 4668 2025-05-24
50 % 8.05 5015 2025-05-31
30 % 8.64 5709 2025-06-09
10 % 9.58 7487 2025-06-13
05 % 10.02 8665 2025-06-16

Peakflow exceedence plot for REXI1

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