Peakflow Forecasts Header

HENRYS FORK--AT ST. ANTHONY
   State:  Idaho    County:  FREMONT
   Latitude:  43 58' 0" North    Longitude:  111 40' 21" West
   Elevation:  4951 feet
   Supporting WFO:  Pocatello    
   Action Stage:  6.5'   Flood Stage:  7'   Moderate Flood Stage:  8.2'
   Major Flood Stage:  
11'

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 ST. ANTHONY   (ANTI1)
Forecasts for Water Year
2025
Ensemble Date: 2025-07-11
Forecast Period: July 11 to November 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 3.59 1408 2025-07-22
90 % 3.65 1496 2025-07-27
70 % 3.73 1620 2025-10-02
50 % 3.79 1712 2025-10-15
30 % 3.86 1837 2025-10-25
10 % 3.98 2036 2025-10-31
05 % 4.40 2819 2025-11-01

Peakflow exceedence plot for ANTI1

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