Peakflow Forecasts Header

SNAKE--AB JACKSON L AT FLAGG R
   State:  Wyoming    County:  TETON
   Latitude:  44 5' 55" North    Longitude:  110 40' 1" West
   Elevation:  6802 feet
   Supporting WFO:  Riverton    
   Action Stage:  9'   Flood Stage:  10'   Moderate Flood Stage:  11'

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--AB JACKSON L AT FLAGG R   (FLGW4)
Forecasts for Water Year
2026
Ensemble Date: 2026-02-14
Forecast Period: February 14 to June 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 6.08 3978 2026-05-01
90 % 6.21 4196 2026-05-08
70 % 6.54 4780 2026-05-18
50 % 6.84 5329 2026-05-23
30 % 7.03 5703 2026-05-28
10 % 7.40 6459 2026-05-31
05 % 7.90 7567 2026-06-01

Peakflow exceedence plot for FLGW4

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