Peakflow Forecasts Header

SIUSLAW--NEAR MAPLETON
   State:  Oregon    County:  LANE
   Latitude:  44 3' 45" North    Longitude:  123 52' 54" West
   Elevation:  41 feet
   Supporting WFO:  Portland    
   Action Stage:  15'   Flood Stage:  18'   Moderate Flood Stage:  22'
   Major Flood Stage:  28'

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.

SIUSLAW--NEAR MAPLETON   (MPLO3)
Forecasts for Water Year 2027
Ensemble Date: 2026-10-10
 Forecast Period: October 10 to February 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 8.04 4457 2026-11-26
90 % 8.94 5706 2026-12-02
70 % 12.69 11627 2026-12-14
50 % 15.44 16751 2026-12-27
30 % 17.83 21752 2027-01-10
10 % 23.65 35824 2027-01-19
05 % 26.42 43480 2027-01-27

Peakflow exceedence plot for MPLO3

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