Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
338 AM EST Mon Dec 09 2013
Valid 12Z Mon Dec 09 2013 - 12Z Wed Dec 11 2013
...A quick burst of snow for the Mid-Atlantic on Tuesday...
...Temperatures will be 10 to near 30 degrees below average from the Great
Lakes/Lower Mississippi Valley to the Rockies...
...A cold Santa Ana for southern California Monday into Tuesday...
A complicated storm extending from the Great Lakes/Northeast to the
Central Gulf Coast will move northeastward to Southeastern Canada and off
the East Coast by Tuesday. The system will produce freezing rain/sleet
over parts of the Mid-Atlantic that will change over to rain by Monday
afternoon. Snow will develop over the Great Lakes into New England
through Monday evening. An area of rain will also develop over the
Mid-Atlantic on Monday morning, moving into Southern New England by Monday
evening. In addition, showers and thunderstorms will develop along the
front over the Lower Mississippi Valley into Eastern/Central Gulf Coast
that will move into the Southeast/Mid-Atlantic by Monday afternoon, moving
off the Coast by late Monday night.
Rain will develop over the Western Gulf Coast moving into the Lower
Mississippi Valley by Monday evening. A wave of low pressure will develop
over the Eastern Gulf Coast late Monday night and move northeastward off
the North Carolina Coast by Tuesday afternoon. This wave will bring
another round of snow into the Eastern Ohio Valley/Central Appalachians
into parts of the Mid-Atlantic/Southern New England Tuesday morning into
afternoon. Additionally, rain will move into the Southern Mid-Atlantic on
Tuesday morning and off the Coast by noontime. Showers and thunderstorms
will also develop over parts of the Southeast and likewise move off the
Coast by Tuesday afternoon.
Meanwhile, a system over West-Central Canada will move southeastward to
the Northern Plains then race into the Upper Great Lakes by Tuesday
evening. The storm will produce snow over parts of the Northern High
Plains on Monday morning moving across the Upper Midwest into the Great
Lakes by Tuesday evening. A wave along the boundary will produce snow
over parts of the Northern Rockies/Northern High Plains on Tuesday morning
moving into the Upper Mississippi Valley by Tuesday evening.
High pressure over Western Canada will move southeastward along the
Canadian Rockies just poised to enter Montana by Tuesday evening.
Circulation around the high will produce upslope snow over parts of the
Northern/Central Rockies into parts of the Central High Plains on Tuesday
Elsewhere, cold high pressure over the Great Basin will aid in producing
offshore flow over Southern California Monday into Tuesday morning.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php