Peakflow Forecasts Header

POTLATCH--BELOW LITTLE POTLATCH CR NR SPALDING
   State:  Idaho    County:  NEZ PERCE
   Latitude:  46 29' 55" North    Longitude:  116 45' 42" West
   Elevation:  843 feet
   Supporting WFO:  Spokane    

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.

POTLATCH--BELOW LITTLE POTLATCH CR NR SPALDING   (PRII1)
Forecasts for Water Year
2027
Ensemble Date: 2026-10-05
Forecast Period: October 5 to February 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 6.55 272 2026-12-02
90 % 7.57 738 2026-12-08
70 % 8.41 1166 2027-01-03
50 % 9.55 1948 2027-01-13
30 % 10.57 2873 2027-01-24
10 % 11.94 5118 2027-01-30
05 % 15.95 14084 2027-01-31

Peakflow exceedence plot for PRII1

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