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Short Range Public Discussion
 
(Caution: Version displayed is not the latest version. - Issued 0851Z Dec 17, 2014)
 
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Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 351 AM EST Wed Dec 17 2014 Valid 12Z Wed Dec 17 2014 - 12Z Fri Dec 19 2014 ...Widely scattered showers expected across the Western U.S.... ...Weather will become increasingly active over the south central U.S.... ...Conditions will remain unsettled from the Great Lakes to the Northeast... Multiple weak pieces of energy rippling through the flow aloft will trigger widely scattered showers across the Western U.S. Wednesday and Thursday. Moisture will be extremely limited with these features...keeping precipitation totals light and confined to the favored slopes of the terrain; However...a more robust system approaching the coast will bring some more significant precipitation into the Pacific Northwest by late Thursday or early Friday. Upper energy swinging out of the Southwest...combined with return flow from the western Gulf...will spread precipitation across the south central U.S. Wednesday into Thursday. Rumbles of thunder will be possible across Texas while a mix of snow...sleet...and freezing rain is expected within the northern edge of the precipitation shield stretching across the Central Plains and Middle Mississippi Valley. Upstream...a second piece of energy aloft will cross northern Mexico and is expected to ignite an area of heavy rains and thunderstorms over Texas by early Friday. A surface low deepening off the New England coast and lifting towards the Canadian Maritimes will keep conditions unsettled from the Great Lakes to the Northeast the next few days. Atlantic moisture wrapping around the strengthening storm will fuel widespread coastal rains and interior snows. Also...the warm ocean air moving in over cooler air at the surface could result in periods of freezing rain across portions of interior New England. Gerhardt Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php