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: 2026-06-14
Forecast Period: June 14 to October 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 3.39 213 2026-06-14
90 % 3.39 213 2026-06-14
70 % 3.39 213 2026-06-14
50 % 3.83 379 2026-08-21
30 % 4.24 598 2026-09-18
10 % 4.96 1145 2026-09-29
05 % 5.04 1222 2026-10-01

Peakflow exceedence plot for LSMO3

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