Peakflow Forecasts Header

GROS VENTRE--AT ZENITH
   State:  Wyoming    County:  TETON
   Latitude:  43 33' 25" North    Longitude:  110 45' 45" West
   Elevation:  6260 feet
   Supporting WFO:  Riverton    
   Action Stage:  26'

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.

GROS VENTRE--AT ZENITH   (GVZW4)
Forecasts for Water Year 2026
Ensemble Date: 2025-12-09
 Forecast Period: December 9 to April 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 17.97 66 2026-01-13
90 % 17.97 66 2026-02-16
70 % 17.97 66 2026-02-16
50 % 18.05 78 2026-02-27
30 % 18.18 97 2026-03-16
10 % 18.54 168 2026-03-28
05 % 18.92 275 2026-03-30

Peakflow exceedence plot for GVZW4

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