Peakflow Forecasts Header

SNAKE--NEAR ANATONE
   State:  Washington    County:  ASOTIN
   Latitude:  46 5' 49" North    Longitude:  116 58' 36" West
   Elevation:  807 feet
   Supporting WFO:  Spokane    
   Action Stage:  19'   Flood Stage:  20'   Moderate Flood Stage:  23'
   Major Flood Stage:  24'

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.

SNAKE--NEAR ANATONE   (ANAW1)
Forecasts for Water Year 2025
Ensemble Date: 2025-05-12
 Forecast Period: May 12 to September 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 13.29 83729 2025-05-13
90 % 13.29 83730 2025-05-13
70 % 13.29 83730 2025-05-13
50 % 13.29 83730 2025-05-13
30 % 13.29 83730 2025-05-13
10 % 14.51 95220 2025-06-08
05 % 15.47 104432 2025-06-10

Peakflow exceedence plot for ANAW1

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