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
2026
Ensemble Date: 2025-12-06
Forecast Period: December 6 to April 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 11.02 13453 2025-12-10
90 % 11.02 13453 2025-12-10
70 % 11.02 13453 2025-12-10
50 % 11.02 13453 2025-12-10
30 % 11.02 13453 2025-12-10
10 % 11.11 13768 2025-12-24
05 % 11.84 16381 2026-01-28

Peakflow exceedence plot for LSMO3

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