Hydrologic Outlook issued December 25 at 5:48AM PST by NWS Seattle WA

ESFSEW

An atmospheric river will bring significant rainfall to the Olympic
Mountains today into Thursday. Widespread rainfall totals of 3 to 5
inches are expected, with locally over 6 inches on the the highest
peaks. Snow levels will increase from around 3,500 feet up to as
high as 4,500 feet tonight before lowering once again Thursday.

While precipitation will be much less with the systems beginning
Friday the lack of much of a break will keep rivers over the
Southwest Interior rising into the weekend. It is possible the lower
reaches of the Chehalis could flood late Friday into Saturday. The
Skookumchuck near Bucoda, Newaukum near Chehalis and the Satsop near
Satsop could reach action stage Friday.

Please monitor the latest river forecasts from the National Weather
Service for additional information.