Flood Warning issued December 18 at 9:58AM PST by NWS Seattle WA
Issue date: 2025-12-18T17:58+00:00
...The Flood Warning continues for the following rivers in Washington... Skokomish River At Potlatch affecting Mason County. Cowlitz River Below Mayfield Dam affecting Lewis County. .Rain is in the forecast today for 2 to 3 inches in the mountains. This will not cause additional flooding and allow some rivers to fall below flood stage. Dam operations to maintain a safe flood pool for area dams could maintain elevated flow levels or they could raise or lower levels downstream of the dams. Dam regulation can change rapidly. Rainfall yesterday and overnight is driving area rivers back up with new rounds of flooding occurring or upcoming. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Cowlitz River below Mayfield Dam. * WHEN...Until further notice. * IMPACTS...At 25,000.0 cfs, the Cowlitz River will flood the reach from Mayfield Dam downstream through Toledo. Flood waters will inundate some farmlands and several roads...mainly near Toledo. * ADDITIONAL DETAILS... - At 8:00 AM PST Thursday the flow was 28,700.0 cfs. - Flood flow is 25,000.0 cfs. - Recent Activity...The maximum river flow in the 24 hours ending at 11:00 PM PST Tuesday was 28,700 cfs. - Forecast...The river is expected to remain near 28,800 cfs through the weekend. - http://www.weather.gov/safety/flood
Special Weather Statement issued December 17 at 3:33PM PST by NWS Seattle WA
Issue date: 2025-12-17T23:33+00:00
Significant rainfall over the past week has increased soil moisture to high levels across western Washington. Additional rainfall of 1 to 2 inches is expected through Friday. This amount of rain will continue to put extra pressure on soil instability, leading to an increased threat of landslides and debris flows, especially from recent burned areas, with this new rainfall acting as a trigger. Numerous landslides have already occurred in Whatcom, Skagit, King Counties and others. More landslides continue to be possible. Areas most susceptible to landslides debris flows under these conditions are steep coastal bluffs, other steep hillsides or road cuts, and recent burned areas. A diminishing threat of landslides and debris flows will continue for several days after the rain ends. For more information about current conditions, visit www.weather.gov/seattle, select Hydrology, and then scroll down for the links to the landslide information pages. For more information on landslides, visit the website for the Washington State Department of Natural Resources landslide geologic hazards at: http://bit.ly/2mtA3wn
