Peakflow Forecasts Header

YAAK--NEAR TROY
   State:  Montana    County:  LINCOLN
   Latitude:  48 33' 42" North    Longitude:  115 58' 9" West
   Elevation:  1839 feet
   Supporting WFO:  Missoula    
   Action Stage:  7.5'   Flood Stage:  8'   Moderate Flood Stage:  9'
   Major Flood Stage:  10'

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.

YAAK--NEAR TROY   (TRYM8)
Forecasts for Water Year 2026
Ensemble Date: 2026-03-12
 Forecast Period: March 12 to July 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 6.30 2949 2026-03-29
90 % 6.39 3077 2026-04-05
70 % 6.82 3812 2026-04-17
50 % 6.92 4015 2026-04-24
30 % 7.14 4512 2026-04-30
10 % 7.48 5441 2026-05-30
05 % 7.87 6587 2026-06-07

Peakflow exceedence plot for TRYM8

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