The Nation's Weather 11.18.09

By WEATHER UNDERGROUND (AP)

Wet weather was forecast for the Eastern U.S. on Wednesday as a low pressure system hovered over the region.

The system sitting over the Mid-Mississippi River Valley was expected to continue pushing northeastward up the Ohio River Valley and into New England. Flow around the system could continue pulling moist air in from the Gulf of Mexico, causing light and scattered showers to persist.

Wet weather was expected to diminish over the Mid- and Lower Mississippi River Valley and persist over the Carolinas, Virginias, Ohio, Indiana and Kentucky. Rainfall totals could remain less than a quarter of an inch since the system has weakened and turned into an occluded front.

Meanwhile, behind this system, cool air was forecast to continue pouring in from the North and allow for cool temperatures in the Southern and Central Plains. A freeze advisory remained in effect over the Southern Plains because overnight lows could dip into the upper-20s.

To the North, the Great Lakes and Upper Midwest could see another sunny day because of dominating high pressure. Sunny skies and temperatures in the 40s and 50s were expected.

Out West, a cold front could continue pushing through the Pacific Northwest as a low pressure system moves into British Colombia. This could allow for another rainy day with snow at high elevations of the Cascades and Northern Plains.

Expected rainfall totals were less than an inch in most areas, while snowfall accumulation in the mountains could range between 3-5 inches.

The system also could create another chilly day over the rest of the West Coast on Wednesday.

On Tuesday, temperatures in the Lower 48 states ranged from a low of -13 degrees at Lake George, Colo. to a high of 86 degrees at Riverside, Calif.