US Short Term Forecast to Jan 23

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
Valid 00Z Tue Jan 21 2014 - 00Z Thu Jan 23 2014

...Heavy snow for the Mid-Atlantic into Southern New England...

A front moving off the Northeast/Mid-Atlantic Coast will develop a wave of low pressure over the Tennessee Valley that will intensify rapidly moving off the North Carolina Coast by Tuesday afternoon /evening.

The storm will continue to deepen Tuesday night into Wednesday morning moving just off the Mid-Atlantic Coast paralleling the Northeast Coast to just off Cape Cod by Wednesday morning.

The system will produce light snow over parts of the Middle Mississippi Valley by Monday evening expanding into parts of the Ohio Valley by early Tuesday morning.

As the storm moves into the Mid-Atlantic on Tuesday, moisture from the Atlantic will move inland aiding in the development of snow over the Mid-Atlantic to the Ohio Valley/Tennessee Valley.

The system's dynamics will increase, producing an area of moderate to heavy snow over parts of the Mid-Atlantic by Tuesday evening, moving into Southern New England and Coastal Northern New England by Wednesday morning.

In addition, rain will develop along parts of the Eastern Gulf Coast moving into the Southern tip of Florida by Tuesday evening, ending
overnight Tuesday.

Meanwhile, cold high pressure over the Northern Plains will move southward to the Central Gulf Coast by Wednesday.

The associated cold air moving over the relatively warm waters of the Great Lakes will produce lake effect snow downwind from the Lakes through late Tuesday night.

Another developing wave of low pressure over West-Central Canada, Tuesday morning, will move southeastward to the Upper Great Lakes by Wednesday morning.

The system will produce snow over parts of the Northern Plains by Tuesday morning that will move into the Upper Great Lakes by Wednesday.

Also on Wednesday morning, another area of cold high pressure over
West-Central Canada will begin to move southward.

A front over parts of the Northern High Plain/Northern Rockies will aid in focusing upslope flow to produce light snow over the area on Wednesday morning.

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