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: 2026-02-18
 Forecast Period: February 18 to June 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 5.85 380 2026-03-15
90 % 6.07 411 2026-03-19
70 % 6.49 474 2026-03-27
50 % 6.82 526 2026-04-09
30 % 7.33 610 2026-04-17
10 % 8.49 820 2026-05-10
05 % 9.07 934 2026-05-15

Peakflow exceedence plot for PIHI1

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