Short Range Forecast Discussion
Weather Prediction Center College Park MD
Valid thru 00Z Wed Dec 11 2013
Cold conditions are expected from the Intermountain West into the Northern Plains as an upper level trough remains steadfast over the region.
Temperatures across the large section of the West and Northern Plains should struggle to rise to 20F through Tuesday, before high temperatures moderate towards 30F Wednesday as the flow becomes more westerly in the wake of a fairly strong upper level disturbance.
A strong surface high building into the Great Basin combined with a packet of upper level energy moving by the Sierra Nevada is expected to lead to a cool Santa Ana wind event for southern California from late tonight into Tuesday with winds gusting to 40 mph.
On the eastern side of the upper-level trough is where the action is as
upper level disturbances foster waves of low pressure which then ripple up a frontal boundary, bringing moderate to heavy rainfall to the Southeast.
From the Mid-Atlantic states northward into New England, a mixed bag of snow, sleet, and freezing rain is expected through Monday in association with one of the stronger low pressure centers.