Peakflow Forecasts Header

PORTNEUF--AT POCATELLO
   State:  Idaho    County:  BANNOCK
   Latitude:  42 52' 18" North    Longitude:  112 28' 5" West
   Elevation:  4420 feet
   Supporting WFO:  Pocatello    
   Action Stage:  8'   Flood Stage:  8.5'   Moderate Flood Stage:  10'
   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.

PORTNEUF--AT POCATELLO   (PIHI1)
Forecasts for Water Year 2027
Ensemble Date: 2026-10-13
 Forecast Period: October 13 to February 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 4.56 206 2026-10-23
90 % 4.56 206 2026-10-23
70 % 4.56 206 2026-10-23
50 % 4.64 215 2026-10-31
30 % 4.92 246 2026-11-14
10 % 5.32 295 2026-12-05
05 % 5.53 322 2026-12-30

Peakflow exceedence plot for PIHI1

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