COLUMBIA − BLO ROCK ISLAND DAM
(
RISW1
)
State:
Washington
County:
Douglas
Latitude:
47 19' 57" North
Longitude:
120 4' 48" West
Elevation:
609 ft
Supporting NWS Forecast Office:
WFO Spokane
Click for NWS Official River Forecasts for RISW1
Daily Historical Statistics for October 01, 2023
Mean Flow:
74400 cfs
Max Flow:
110000 cfs (1975)
Min Flow:
46900 cfs (2008)
Statistics based on water years:
1962-2022
* statistics estimated based on current rating
The 4-10 Day Trend Forecast is based on model guidance and uncertainty during this period is greater.
For Data Used In Plot
For Data Used In Plot
For Data Used In Plot
For Data Used In Plot
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RISW1