Grays Harbor County Emergency Alert: UPDATE Satsop River at Satop: Event Cancelled Chehalis River at Porter: Flood Warning in effect until Sunday Evening * IMPACTS...At 49.0 feet, the Chehalis River in Grays Harbor will flood pasture lands and many roads...including SR 12 between Oakville and Rochester. High tidal levels at Aberdeen will worsen flooding along the lower reaches. * ADDITIONAL DETAILS... - At 11:45 AM PST Thursday the stage was 49.4 feet. - Flood stage is 48.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 11:45 AM PST Thursday was 49.5 feet. - Forecast...The river is expected to rise to a crest of 49.7 feet late tomorrow morning. It will then fall below flood stage late Sunday morning. Chehalis River above Grand Mound: Flood Warning in effect until late Saturday Evening * IMPACTS...At 142.5 feet, the Chehalis River in Thurston County will flood several roads in Independence Valley with swiftly moving water including SR-12 and James, Independence, Moon and Anderson Roads. Flood waters will cut off access to and from Chehalis Reservation and inundate nearby farm lands. Some residential structures may be threatened. * ADDITIONAL DETAILS... - At 7:00 AM PST Thursday the stage was 143.3 feet. - Flood stage is 141.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:00 AM PST Thursday was 143.3 feet. - Forecast...The river is expected to rise to a crest of 143.5 feet late this afternoon. It will then fall below flood stage early Saturday afternoon. https://water.noaa.gov