Peakflow Forecasts Header

ENTIAT--NEAR ARDENVOIR
   State:  Washington    County:  CHELAN
   Latitude:  47 49' 6" North    Longitude:  120 25' 18" West
   Elevation:  1561 feet
   Supporting WFO:  Spokane    
   Action Stage:  6'   Flood Stage:  7.5'   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.

ENTIAT--NEAR ARDENVOIR   (ARDW1)
Forecasts for Water Year 2026
Ensemble Date: 2026-09-10
 Forecast Period: September 10 to January 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 1.11 70 2026-09-10
90 % 1.11 70 2026-09-10
70 % 1.97 200 2026-11-05
50 % 2.74 404 2026-11-14
30 % 3.15 589 2026-11-29
10 % 4.53 1410 2026-12-14
05 % 5.51 2161 2026-12-26

Peakflow exceedence plot for ARDW1

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