Peakflow Forecasts Header

LITTLE N SANTIAM--NEAR MEHAMA
   State:  Oregon    County:  MARION
   Latitude:  44 47' 30" North    Longitude:  122 34' 40" West
   Elevation:  655 feet
   Supporting WFO:  Portland    

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.

LITTLE N SANTIAM--NEAR MEHAMA   (LSMO3)
Forecasts for Water Year
2027
Ensemble Date: 2026-10-13
Forecast Period: October 13 to February 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 7.46 4744 2026-11-03
90 % 7.64 5085 2026-11-09
70 % 9.00 7964 2026-12-02
50 % 9.82 9862 2026-12-13
30 % 10.79 12714 2026-12-27
10 % 11.57 15357 2027-01-12
05 % 11.95 16803 2027-01-24

Peakflow exceedence plot for LSMO3

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