Area Forecast Discussion
Issued by NWS State College, PA

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000 FXUS61 KCTP 240929 AFDCTP Area Forecast Discussion National Weather Service State College PA 429 AM EST Fri Nov 24 2017 .SYNOPSIS... High pressure will bring sunny skies and mild temperatures to the region today. A cold front will bring some light rain showers on Saturday. This will be followed by a shot of colder air, with scattered light snow showers over parts of the Northwest Mountains and Laurel Highlands Saturday night into Sunday. A prolonged period of mainly dry and seasonably mild weather is then in store for much of next week. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... High pressure in control with low and mid level subsidence. Look for plenty of sunshine. Also milder temperatures aloft will bring warmer temperatures than last few days with highs running a few degrees above avg. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SATURDAY/... Fri eve starts off mainly clear, but clouds will move in from the west overnight as SW flow increases. This will keep overnight lows in the 30s, with the warmest readings likely to be over western portions of the CWA as WAA brings rising temps there late. Coldest readings will be in the Susq Valley where radiational cooling will be more prevalent with lighter wind. Precipitation in form of rain showers will be nearing the NW Mountains by 12z Sat, with best rain chances during the day on Sat. && .LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/... Progressive westerly flow will keep things rather benign through the extended, with temperatures mostly on the mild side and and precipitation very light and short lived. Sat night and Sunday will see a period of lake effect snow showers as another quick blast of seasonably chilly air that will charge across the relatively mild waters of the Grt Lks. ECENS and GEFS both support below normal temperatures Sunday, as deep upper level trough swings over the northeast states. After that we will see general westerly flow with a few weak weather systems moving through. Any precipitation looks to be light and short lived. No significant shots of cold weather expected with this pattern as we await any signs of prolonged winter. && .AVIATION /09Z FRIDAY THROUGH TUESDAY/... The southern edge of a weak thermal trough in the 850-750 mb layer was helping to support a slowly dwindling area of high based strato cu across the Northern Mtns of PA along with the Mid to Upper Susq River Valley. Expect this area of clouds to continue eroding and moving NE through the rest of the predawn hours. Mainly clear skies with VFR conditions for most, if not all of the day today. light winds through the mid morning hours will becoming predominantly southwest at 6-10 kts across the Central and Western parts of the state late this morning and this afternoon, while airfields throughout the Susq Valley see nearly calm air early today, and a light 4-5 kt southwest breeze this afternoon. Outlook... Fri Night...LLWS developing across the NW half of PA. clear to partly cloudy skies will prevail through at least early tonight. Sat...Chance of rain showers mainly over NW half, changing to snow showers Sat night. Cig restrictions likely NW half. Sun...Chance of snow showers across the NW in the morning. Otherwise no sig wx expected. Mon-Tue...No sig wx. && .CTP WATCHES/WARNINGS/ADVISORIES... None. && $$ SYNOPSIS...Ross NEAR TERM...Ross SHORT TERM...Ross/RXR LONG TERM...Ross/Ceru AVIATION...Lambert is the U.S. government's official web portal to all federal, state and local government web resources and services.