National Weather Service United States Department of Commerce

Winter Storm, Flooding and Critical Fire Weather Concerns Today

A winter storm will affect portions of New England through tonight with several inches of snow in the forecast. Meanwhile, the Pacific Northwest will see more heavy rainfall from a series of storms that may bring more flooding and potential landslides. For the western High Plains and southern California, strong winds and dry conditions will keep fire weather threats critical. Read More >

On the morning of July 17th, 2008 a volcanic cloud passed over the Pacific Northwest. It was apparent on the morning visible satellite imagery. This cloud wasn't volcanic ash, but Sulphur Dioxide (SO2). The volcanic cloud appears as the faint west-to-east bands of clouds from the ocean and extending over Washington. Note that it looks similar to the wildfire smoke near Northern California. Okmok erupted on the afternoon of July 12th in the Aleutian Islands. The cloud from this eruption has meandered around in the Gulf of Alaska for the past 5 days before being caught up in the jet stream and pushed into the Pacific Northwest. In the satellite loop below, note how the cloud becomes less visible as the sun continues to rise (the loop starts at sunrise and ends at 9am PDT).

Visible Satellite Image

Visible Satellite Loop

 

The image loop below is an Infrared Satellite loop on the afternoon/evening of July 12th. The bright red/pink area over the central Aleutian Islands is the ash cloud from the Okmok eruption.

IR Satellite Loop