A low pressure system that developed in the Gulf of Alaska has moved onshore and continues pushing a cold front down the West Coast on Tuesday. Heaviest rain produced by this system will shift from British Colombia and Washington, to Oregon and California. This will produce periods of heavy snowfall across the northern Sierras as well. For Tuesday night into Wednesday, expect 1 to 2 feet of snow possible across the Sierras, with 2 to 4 feet likely above 7,000 feet. Snow levels across the Cascades will remain at 2,000 feet, even down to 1,000 feet in some areas. Lower level rainfall totals across Oregon and California will range around 1 inch.
In the East, expect mild weather as a large ridge of high pressure stretches from the Plains, over the Mississippi River Valley, and to the East Coast. This system allows for clearing skies over the Northeast, as it helps to push the low pressure system and associated cold front eastward into the Atlantic Ocean. Expect a warming trend to persist as this ridge builds in and sunny skies return. The Central and Northern Plains will see highs in the 60s, again, while the Southern Plains will reach into the 70s.
Temperatures in the Lower 48 states Monday ranged from a morning low of -5 degrees at Kremmling, Colo., to a high of 83 degrees at Falfurrias, Texas.
Weather Underground: http://www.wunderground.com
National Weather Service: http://iwin.nws.noaa.gov