Peakflow Forecasts Header

CLEARWATER--AT SPALDING
   State:  Idaho    County:  NEZ PERCE
   Latitude:  46 26' 54" North    Longitude:  116 49' 32" West
   Elevation:  770 feet
   Supporting WFO:  Spokane    
   Action Stage:  17'   Flood Stage:  18'   Moderate Flood Stage:  19'
   Major Flood Stage:  19.4'

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.

CLEARWATER--AT SPALDING   (SPDI1)
Forecasts for Water Year 2026
Ensemble Date: 2026-09-15
 Forecast Period: September 15 to January 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 4.93 7957 2026-09-15
90 % 4.93 7957 2026-09-15
70 % 5.40 9655 2026-10-11
50 % 6.12 12582 2026-11-05
30 % 7.03 16759 2026-11-25
10 % 8.22 23006 2026-12-13
05 % 10.65 38616 2026-12-30

Peakflow exceedence plot for SPDI1

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