The Nation's Weather 09.13.09

By WEATHER UNDERGROUND (AP)

Wet weather is anticipated over the South on Sunday due to an area of low pressure. This slow moving system will continue picking up moisture from the Gulf of Mexico and push widespread scattered showers and thunderstorms over the southern Plains and the Lower Mississippi River Valley.

Coastal flooding will remain a threat as rainfall between 1-2 inches are expected in most areas. As flow around this system battles with a strong ridge of high pressure to the north, a front will linger over the Southeast.

This will kick up light and scattered showers throughout the day, none of which are likely to turn severe.

In the north, high pressure will allow for mild weather over the Upper Midwest and will stretch over the Mississippi into the Mid-Atlantic and New England states. Expect drier and windy conditions over New England as the low pressure system finally pushes eastward into the Atlantic Ocean.

The Northeast will see highs in the 70s, while the Plains will remain in the 80s.
To the West, a low pressure system developing off the Northern Rockies will spread scattered showers and thunderstorms over the High Plains. Expect heavy rainfall in areas of strong storm development, as well as possible hail and strong winds.

Farther West, a trough of low pressure will continue pushing moisture over the West Coast on Sunday. At this system remains to the south, northern and central California may see light rain with cooler conditions, while the Pacific Northwest will only see a few patchy clouds. Expect highs in the 70s over most of the West Coast.

Temperatures in the Lower 48 states Saturday ranged from a low of 25 degrees at West Yellowstone, Mont., to a high of 117 degrees at Deathe Valley, Calif.