National Weather Service United States Department of Commerce

Heavy to Excessive Rainfall in the Central Appalachians; Severe Weather in the Mid-South; Hot Weather in Southern California

Heavy to excessive rainfall may lead to flooding today over southwest Pennsylvania into northern West Virginia, and western Maryland. Severe thunderstorms are possible this afternoon and evening in the Mid-South and across Eastern North Carolina. An extended period of hot weather is forecast for parts of coastal southern California including Los Angeles from today through Thursday. Read More >

     An unusually strong summer cold front swept through the Inland Northwest on July 12th, 2010. Strong winds created a dust storm in locations on the Columbia Basin. Visibilities were reduced to near-zero is some spots, causing accidents and road closures. Click here for a map of the wind gust reports.

     Below is a MODIS True Color visible image showing the plumes of dust (center part of the image), as well as the smoke from the Swakane Fire north of Wenatchee (left part of image). Click on the image to see a larger view (4.4 Mb)

 

MODIS True Color Image

 

     The image below shows the visible satellite image with the dust plume just north of Moses Lake (KMWH). Click on this image to get an animated loop (12Mb!!!) which shows the origin and movement of the dust plume through the afternoon hours.

 

Visible Satellite Image

 

Scott Bachmeier of CIMSS put together a web blog of more satellite imagery from this event.

     Web cameras also did a great job of showing the blowing dust. The images below from the Wilson Creek Airport had some of the best imagery. Click on the images for a movie loop (4 Mb).

 

 

Wilson Creek Airport South

 

 

Wilson Creek Airport East

 

 

     The plume of dust spread more than 100 miles to the east. The webcam images from Interstate 90 on the west edge of Spokane show the dimished visibility. Click on the images for movie loops, which show the constantly changing visibility during the afternoon.

 

I-90 at SR902

 

I-90 at Thomas Mallen Rd

By Ron Miller