Water from excessive rainfall swelled over sidewalks and slowed traffic Friday afternoon in Aberdeen and Hoquiam, a result of the winter’s first potent storm.

The National Weather Service issued a flood watch warning Friday morning for Grays Harbor County and 10 other counties in Western Washington. The warning will stay in effect through Saturday afternoon, Nov. 5.

According to weather service data, the Chehalis River is projected to crest near Porter Saturday morning at 45.42 feet — still within the “Action Flood Stage,” meaning people should take precautionary actions.

The Satsop River is projected to crest at around 37 feet sometime between Friday night and Saturday morning.

“We keep encouraging residents to drive slowly and don’t drive through any standing water,” said Nick Falley, the Grays Harbor County Emergency Management Program Coordinator.

“Never drive around barricades or through flooded roads,” the program stated on its Facebook page.

Several streets near downtown Aberdeen were completely covered in stormwater Friday afternoon. Franklin Field — which functions as a stormwater retention area — was filled with several feet of stormwater, which had breached a concrete barrier on the southern side of the field, covered a neighboring sidewalk and leached into Market Street. State and Alder streets also had significant stormwater coverage.

The City of Hoquiam did not report any road closures as of 4 p.m. Friday afternoon.

The Department of Transportation stated traffic is being alternated at mile post 39.1 on state Route 109 due to a landslide.

The weather service predicted 26-mile-per-hour winds for Friday afternoon, with some gusts reaching 45 miles per hour.

For its marine zone forecast, the service also issued a small craft advisory in effect until Saturday afternoon.