Peakflow Forecasts Header

PORTNEUF--AT TOPAZ
   State:  Idaho    County:  BANNOCK
   Latitude:  42 37' 30" North    Longitude:  112 5' 16" West
   Elevation:  4918 feet
   Supporting WFO:  Pocatello    
   Action Stage:  3.5'   Flood Stage:  4'

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.

PORTNEUF--AT TOPAZ   (TOPI1)
Forecasts for Water Year
2022
Ensemble Date: 2021-12-08
Forecast Period: December 8 to April 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 2.47 100 2021-12-10
90 % 2.57 116 2022-01-11
70 % 2.89 182 2022-03-11
50 % 3.05 222 2022-03-22
30 % 3.15 253 2022-03-26
10 % 3.30 301 2022-03-31
05 % 3.53 383 2022-04-01

Peakflow exceedence plot for TOPI1

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