NWS issues landslide alert for Seattle, Western Washington

SEATTLE (KOMO) – The National Weather Service on Monday issued a landslide alert for the vast majority of Western Washington, including Seattle.

The advisory estimates one to three inches of rain expected in the lowlands, highlighting areas from Clallam and Snohomish Counties southward.

“This amount of rain will put extra pressure on soil instability, leading to an increased threat of landslides,” per the advisory.

Brent Bower, hydrologist for the National Weather Service, echoed these concerns.

“This is a period of time that they [the public] should be more alert, particularly for those that drive through or live in an area that’s prone to landslides.”

Bower also pointed to the fact that the region has already experienced landslides this season as a sign of potentially more to come.

In February, a landslide shut down Highland Park Way SW in West Seattle for multiple days.

Another landslide blocked Interstate-90 outside Issaquah, while another forced the evacuation of twelve homes in Maple Valley.

Bower warned that the risk could be greatest Wednesday and Thursday due to heavier rain in the forecast.

For more information on landslides, visit the National Weather Service Forecast Office or the Washington State Department of Natural Resources.