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: 2026-09-10
Forecast Period: September 10 to January 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 2.45 276 2026-09-22
90 % 2.45 279 2026-09-29
70 % 2.53 309 2026-10-12
50 % 2.59 335 2026-10-20
30 % 2.68 374 2026-10-29
10 % 3.21 653 2026-11-06
05 % 3.49 842 2026-11-15

Peakflow exceedence plot for FLGW4

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