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 2026
Ensemble Date: 2026-06-05
 Forecast Period: June 5 to October 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 3.70 369 2026-06-09
90 % 3.70 369 2026-06-09
70 % 3.70 369 2026-06-09
50 % 3.72 378 2026-06-22
30 % 3.96 490 2026-09-16
10 % 4.86 1048 2026-09-27
05 % 5.00 1151 2026-09-30

Peakflow exceedence plot for MPLO3

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