Peakflow Forecasts Header

SNAKE--NEAR SHELLEY
   State:  Idaho    County:  BINGHAM
   Latitude:  43 24' 47" North    Longitude:  112 8' 6" West
   Elevation:  4599 feet
   Supporting WFO:  Pocatello    
   Action Stage:  12'   Flood Stage:  12.5'   Moderate Flood Stage:  13'
   Major Flood Stage:  
13.5'

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.

SNAKE--NEAR SHELLEY   (SHYI1)
Forecasts for Water Year
2026
Ensemble Date: 2026-01-16
Forecast Period: January 16 to May 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 7.27 6936 2026-04-18
90 % 7.44 7482 2026-04-19
70 % 7.60 8018 2026-04-23
50 % 7.82 8769 2026-04-25
30 % 7.99 9387 2026-04-27
10 % 8.31 10578 2026-04-29
05 % 8.62 11738 2026-05-01

Peakflow exceedence plot for SHYI1

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