Increased Threat of Landslides in Western Washington

NWS_2012Cumulative rainfall over the last week has soaked soils to the point where the additional rainfall will raise the threat of landslides.

According to the National Weather Service, rainfall amounts in the past 48 hour were generally in the 4 to 9 inch range in the mountains (with locally higher amounts on the Olympics) and generally 1 to 3 inches on the lowlands. This amount of rain has increased soil moisture in Western Washington. Another half to 2 inches of rain is forecast, which will put more pressure on soil instability leading to an increased threat of landslides.