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
2025
Ensemble Date: 2025-07-01
Forecast Period: July 1 to November 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 3.34 225 2025-07-19
90 % 3.70 364 2025-08-21
70 % 4.57 888 2025-10-14
50 % 5.15 1426 2025-10-25
30 % 6.04 2310 2025-10-29
10 % 9.50 9080 2025-11-01
05 % 11.03 13498 2025-11-01

Peakflow exceedence plot for LSMO3

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