Area Forecast Discussion
Issued by NWS State College, PA

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000 FXUS61 KCTP 201924 AFDCTP Area Forecast Discussion National Weather Service State College PA 224 PM EST Mon Nov 20 2017 .SYNOPSIS... The weather for Thanksgiving week travel looks fairly good overall. An early week mild temperature swing will be followed by another shot of cold air Tuesday night into Wednesday. This may create the potential for snow showers, falling temperatures and slick roads over the Alleghenies. Dry weather with near average temperatures is expected through Thanksgiving Day. && .NEAR TERM /THROUGH TONIGHT/... Clear skies expected tonight with variable minimum temperatures based on elevation. Decoupled sites in the valleys could drop into the lower 20s while a gusty SW winds keep the ridges warmer/closer to the freezing mark. && .SHORT TERM /TUESDAY THROUGH TUESDAY NIGHT/... A gusty SW return flow and plenty of sunshine will boost temperatures into the upper 40s to mid 50s on Tuesday. Clouds will increase into Tuesday night. Expect another shot of cold air to follow behind a cold front Tuesday night into early Wednesday. A period of rain/snow is likely with the frontal passage. Temperatures falling below freezing and potential for light snow accumulation/melting-refreezing may create slick roads and areas of difficult travel overnight Tuesday into early Wednesday. && .LONG TERM /WEDNESDAY THROUGH MONDAY/... An upper level trough will skirt just to the north of Pennsylvania early Wednesday. Have dropped POPS through Wednesday though have left slight chance in the NW due to the northwesterly flow across the mountains. Another area of high pressure will build east and keep us mainly dry at least through the end of the week, before a new frontal system takes aim at the area late Friday night into Saturday morning. There decent agreement in the EC/GFS timing. The trough swings through Saturday morning with 850MB temps right around freezing. So given that overnight lows Saturday morning will be around freezing expect for scattered snow showers across central PA as the trough and associated front begin to cross the region through Saturday afternoon. As the trough moves through temperatures will be marginal through the low levels so a rain/snow mix is currently expected with more chance of snow farther northwest. Still to soon for amounts though any rain/snow mix will tamper any accumulations. Have adjusted temperatures as NBM seems to cold Friday night into Saturday. Minimum temperatures will be below normal through mid week with a warming trend into Saturday before dropping off Sunday and into early next week. && .AVIATION /19Z MONDAY THROUGH SATURDAY/... VFR continues tonight into Tuesday. Expect wind gusts from 200-240 degrees 15-25kts on Tuesday. Outlook... Tue night-Wed...Rain/snow showers with sub-VFR likely wrn 1/2. Thu-Fri...No sig wx expected. Sat...Chance of rain/snow showers. && .CTP WATCHES/WARNINGS/ADVISORIES... None. && $$ SYNOPSIS...Steinbugl NEAR TERM...Steinbugl SHORT TERM...Steinbugl LONG TERM...La Corte/Ceru AVIATION...Steinbugl is the U.S. government's official web portal to all federal, state and local government web resources and services.