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COLUMBIA--BLO PRIEST RAPIDS DAM
   State:  Washington    County:  GRANT
   Latitude:  46 37' 59" North    Longitude:  119 52' 0" West
   Elevation:  388 feet
   Supporting WFO:  Spokane    
   Action Stage:  31'   Flood Stage:  32'   Moderate Flood Stage:  33'
   Major Flood Stage:  34'

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.

COLUMBIA--BLO PRIEST RAPIDS DAM   (PRDW1)
Forecasts for Water Year 2024
Ensemble Date: 2024-04-26
 Forecast Period: April 26 to August 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 19.58 169921 2024-05-27
90 % 20.04 176526 2024-06-03
70 % 20.96 190529 2024-06-03
50 % 21.46 198214 2024-06-03
30 % 22.59 216450 2024-06-07
10 % 24.59 250859 2024-06-11
05 % 25.60 269394 2024-06-17

Peakflow exceedence plot for PRDW1

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