The National Weather Service of Seattle has issued a flood watch for Grays Harbor including a threat of flooding of the Chehalis River, in effect through Wednesday evening.
Heavy rain is predicted to continue Tuesday and could drive rivers into the watch area above the flood stage, the service said.
The watch is also for Lewis, Mason and Thurston counties. Rivers facing the threat of flooding include the Newaukum, Skookumchuck and the upper Cowlitz Rivers.
Two to four inches of additional rain is predicted over the river basins through Tuesday night.
A flood watch means that flooding is possible, but not certain or imminent, according to the service. Those who reside in flood-prone locations in the flood watch areas should keep informed of the latest forecasts from the service and be ready to act quickly if flooding is observed or a warning is issued.