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
2025
Ensemble Date: 2025-07-14
Forecast Period: July 14 to November 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 3.20 245 2025-08-23
90 % 3.34 300 2025-09-14
70 % 4.42 878 2025-10-14
50 % 5.00 1308 2025-10-24
30 % 5.65 1875 2025-10-28
10 % 7.03 3367 2025-11-01
05 % 8.14 4738 2025-11-01

Peakflow exceedence plot for MPLO3

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