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 2026
Ensemble Date: 2026-06-06
 Forecast Period: June 6 to October 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 2.93 59 2026-06-12
90 % 2.93 59 2026-06-12
70 % 3.04 67 2026-06-19
50 % 3.33 89 2026-09-07
30 % 3.79 126 2026-09-23
10 % 4.99 245 2026-09-30
05 % 5.22 273 2026-10-01

Peakflow exceedence plot for PIHI1

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