Weather Underground Forecast for Wednesday, Dec. 04, 2013
A cold frontal boundary will continue to move southward over the western third of the country on Wednesday, while a separate cold front will trek across the central U.S.
An arctic air mass will dip southward across the West Coast on Wednesday, as below average temperatures will linger over several states. Temperatures will range between the 30s and 40s across the Pacific Northwest, while the Southwest can expect temperatures between the 50s and 60s. Valleys and deserts can expect nighttime temperatures to drop into the 30s, while higher elevations will experience even colder conditions. Light rain and snow will be possible in southern California, Arizona and New Mexico, while heavy snow can be expected in the central Rockies.
A separate cold frontal boundary will extend from Texas to Wisconsin on Wednesday. The same arctic air mass will dive southward across the Plains and the Midwest, as rain and snow will be possible in a handful of states. The heaviest snow associated with this frontal boundary is forecast to move through Minnesota, Wisconsin and the Great Lakes region on Wednesday, while freezing rain will also be possible. Freezing rain may lead to ice accumulations, which will create hazardous conditions along roadways. Towards the evening, wet weather will begin to impact the Ohio Valley and parts of the Northeast.
A warm, muggy air mass will trigger showers and thunderstorms over the Southeast on Wednesday, while temperatures will range between the 70s and 80s across the Gulf Coast.
Temperatures in the Lower 48 states Tuesday have ranged from a morning low of -5 degrees at Alamosa, Colo. to a high of 90 degrees at Laredo, Texas