The nation's weather

AP News
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Posted: Jan 03, 2010 4:47 AM

A Pacific storm was expected to slam into the Northwest on Sunday, renewing moderate rain and high-elevation snow in Washington and Oregon. The heaviest precipitation wasn't expected to fall until late in the afternoon and through the evening through Monday. This activity was to expand eastward into the Intermountain West through Monday.

A ridge of high pressure to the south was predicted to keep the Southwest and California dry over the next several days.

Meanwhile, a trough of low pressure was expected to drive weather in the East. The trough was predicted to allow cold air to pour into the nation's eastern half. This outbreak of cold air was to be significant enough to cause temperatures well below average as far south as the Gulf Coast. The coldest air was expected to hover over the Upper Midwest and Northeast and cause fairly widespread snow from Michigan through New England. A low-pressure system off the New England coast was predicted to aid snow production as well as enhance strong wind through the area. Winter weather advisories were posted through New England in anticipation of significant snowfall.

Another anticipated effect of this storm: low wind chills. The cold air was expected to combine with strong winds to produce wind chills near zero for many areas in New England.

The Northeast was predicted to rise into the 20s and 30s, while the Southeast was to see temperatures in the 30s, 40s, and some 50s. The Upper Midwest was expected to rise into the 0s and 10s, while the Northwest was to see temperatures in the 30s and 40s.

Temperatures in the Lower 48 states Saturday ranged from a low of -38 degrees at Park Rapids, N.D., to a high of 83 degrees at Anaheim, Calif.