Peakflow Forecasts Header

PROSPECT CREEK--AT THOMPSON FALLS
   State:  Montana    County:  SANDERS
   Latitude:  47 35' 9" North    Longitude:  115 21' 15" West
   Elevation:  2382 feet
   Supporting WFO:  Missoula    
   Action Stage:  6.5'   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.

PROSPECT CREEK--AT THOMPSON FALLS   (PRCM8)
Forecasts for Water Year
2026
Ensemble Date: 2026-01-23
Forecast Period: January 23 to May 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 3.59 717 2026-02-20
90 % 3.79 806 2026-02-26
70 % 4.04 929 2026-04-02
50 % 4.33 1084 2026-04-15
30 % 4.66 1283 2026-04-23
10 % 5.69 1934 2026-04-28
05 % 5.94 2090 2026-05-01

Peakflow exceedence plot for PRCM8

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