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: 2025-05-12
Forecast Period: May 12 to September 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 3.93 475 2025-05-18
90 % 3.93 475 2025-05-18
70 % 4.27 675 2025-05-30
50 % 4.87 1145 2025-06-05
30 % 5.42 1670 2025-06-09
10 % 6.62 3242 2025-06-19
05 % 7.60 4997 2025-06-24

Peakflow exceedence plot for LSMO3

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