After a warm autumn and December (so far) there’s more warmth on the way for this week. Record afternoon temperatures are possible in the Central U.S. to Mid-South U.S. the next several days. The anomalous warmth pushes into the East later this week.
On the back side of the warm air mass a major U.S. temperature pattern change is ahead. Late this week a polar air mass surges through the Great Plains to Texas. Along this first cold front up to one foot of snow occurs in Wisconsin.
By late weekend the arctic air from Canada pours into the Interior West, Continental Divide and Great Plains. Upslope snow fall along the continental Divide and much of the Interior West while the clash of cold and lingering eastern warmth causes rain to snow marching eastward across the East later in the 6-10 day period.
The zero degree line will surge south into the Great Basin, central Plains and Midwest to northern New England in 10 days. Most of the U.S. is colder than normal mid-to-late 11-15 day period.
Pictured: Today’s Climate Impact Company medium-range temperature anomaly forecast for the U.S.