Weather Underground Forecast for Wednesday, December 21, 2011.
The nation will see active weather on Wednesday as two storms ramp up. Moderate to heavy rainfall will spread across the East as low pressure moves into the Great Lakes. The storm will push a series of fronts through the East and Great Lakes, with the heaviest precipitation along the fronts. Rain will be found from the northernmost portion of New England south to the Gulf Coast of the Florida Panhandle.
A second, much colder storm is expected to bring snow to the Northern Plains and Northern Rockies on Wednesday. The Jet Stream will dip south across the region spinning up low pressure at the surface. As the low gets going, it will encounter moisture pulled north out of the Gulf of Mexico allowing for a period of heavy snowfall. Montana and Wyoming could see some heavy accumulations of snow from this storm, with a foot or two possible in favored locations.
In the West, yet another day of gorgeous weather is on tap as high pressure remains firmly entrenched over the region. Temperatures will once again reach highs well above normal, with 50s and 60s anticipated throughout California and 40s in the Northwest. Sunny skies and dry conditions are expected to persist through Christmas on the West Coast.
The southern Plains will also see pleasant weather on Wednesday with high pressure separating the storms in the East and Rockies. This high will bring clear skies and moderate temperatures to the region. Temperatures in the Lower 48 states Tuesday have ranged from a morning low of -5 degrees at Yellowstone, Wyo. to a high of 82 degrees at Crystal River, Fla.