Peakflow Forecasts Header

SF PALOUSE--AT PULLMAN
   State:  Washington    County:  WHITMAN
   Latitude:  46 43' 57" North    Longitude:  117 10' 48" West
   Elevation:  2326 feet
   Supporting WFO:  Spokane    
   Action Stage:  5.5'   Flood Stage:  7'   Moderate Flood Stage:  8'
   Major Flood Stage:  
9'

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.

SF PALOUSE--AT PULLMAN   (PULW1)
Forecasts for Water Year
2025
Ensemble Date: 2025-07-11
Forecast Period: July 11 to November 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 1.05 8 2025-08-07
90 % 1.15 10 2025-08-21
70 % 1.24 12 2025-09-15
50 % 1.31 14 2025-10-15
30 % 1.45 18 2025-10-27
10 % 1.72 28 2025-10-31
05 % 1.82 34 2025-11-01

Peakflow exceedence plot for PULW1

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