* WHAT...Flooding caused by excessive rainfall is possible. * WHERE...A portion of northwest Washington, including the following county, Mason. * WHEN...From Tuesday evening through Wednesday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Two to three and half inches of rain is forecast for the south slopes of the Olympics Tuesday into Wednesday morning. Snow levels will be between 8000 and 9500 feet. The combination of heavy rain with high snow levels could push the Skokomish River near Potlatch above flood stage. - http://www.weather.gov/safety/flood