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 2027
Ensemble Date: 2026-10-10
 Forecast Period: October 10 to February 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 0.42 37 2026-10-10
90 % 0.42 37 2026-10-10
70 % 0.89 72 2026-11-26
50 % 1.43 136 2026-12-28
30 % 2.59 385 2027-01-16
10 % 3.46 690 2027-01-30
05 % 3.87 875 2027-01-31

Peakflow exceedence plot for PRCM8

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