Columbia River at Grand Coulee Dam (outflow), WA

OKANOGAN COUNTY, WA47.9567°N, -118.9805°W Updated 8 hr ago

FLOW RATE

96,122cfs

Flow Rate Historical Avg

MEDIAN FLOW RATE · 7 DAY

96,122cfs

Optimal band: 74,648–100,994 cfs

PERIOD HIGH

97,221cfs

PERIOD LOW

60,525cfs

RUNNABLE

63%

last 7 day in band

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47.9567, -118.9805

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DATA · USACE · NOAA · NWSUPDATED 2026-11-09 00:00 UTC

Site #nwdp:GCL.Flow-Out.Ave.1Hour.1Hour.CBT-REV·USACE

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