Major Western Storm
Wayne Verno, Lead Meteorologist, The Weather Channel
Oct. 10, 2008 6:44 am ET
West | View Regional Video
Unsettled and much cooler weather will dominate a large part of the Western States into the weekend.
A storm system will begin strengthening over the northern Rockies today and Saturday.
Rain and snow will expand in coverage today over parts of Idaho, Montana, and Wyoming, with heavier snow developing tonight into Saturday. Several inches may fall.
Snow levels should lower dramatically; to below 3,000 feet from Wyoming to Oregon northward. Accumulating snow is possible below 3,000 feet by this evening.
Snowfall in excess of a foot may fall over some areas.
Windy conditions will also expand across much of the Western States into the early part of the weekend.
Sustained winds of 20 to 40 mph are possible from northern Arizona and central California northward to Idaho, Wyoming and Oregon. Gusts could exceed 60 mph in a few locations.
The windy conditions will be felt across central and northern California, setting up a prolonged strong wind event through the weekend.
Much cooler, and below average temperatures will also expand across much of the Pacific Northwest, Interior West, and Rockies into the weekend. In some cases, afternoon highs will be 20 to 30 degrees below average.