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Area Forecast Discussion
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000
FXUS61 KCTP 281142
AFDCTP

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
642 AM EST FRI NOV 28 2014

.SYNOPSIS...
HIGH PRESSURE WILL SLIDE OVER THE APPALACHIAN MOUNTAINS TODAY.
WARMER AIR WILL GRADUALLY WORK INTO THE AREA FROM THE SOUTH THIS
WEEKEND. A COLD FRONT WILL PUSH THROUGH LATE SUNDAY NIGHT AND
THROUGH THE DAY ON MONDAY. FAST WESTERLY FLOW NEXT WEEK WILL
BRING A COUPLE OF WEATHER SYSTEMS THROUGH BY NEXT WEEKEND.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
UPPER TROUGH AXIS IS TO THE EAST OF THE AREA. BRIEFLY INTENSE
SNOW SHOWERS WILL BRING ANOTHER INCH OR SO TO SOMERSET COUNTY
EARLY THIS MORNING. OTHER SCATTERED SNOW SHOWERS WILL BE LIGHTER
AND MORE-TRANSIENT. THESE SHOULD NOT MAKE ANY MORE THAN A DUSTING
TO HALF INCH OF SNOW THIS MORNING. THE RISING HEIGHTS/RIDGING
DURING THE DAY WILL HELP TO DECREASE THE SNOW SHOWERS TO FLURRIES
OR LESS LATE THIS MORNING. THE COLDEST LLVL AIR WILL BE OVERHEAD
THIS AFTERNOON...SO TEMPERATURES WILL STAY COLD...NOT RISING OUT
OF THE M20S NORTH AND M30S SOUTH. WESTERLY WINDS OF 10-15 MPH WILL
MAKE IT FEEL EVEN CHILLIER.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH SATURDAY NIGHT/...
THE THERMAL TROUGH MOVES EAST AND GOOD SOUTHERLY FLOW STARTS TO
DEVELOP TONIGHT. A WARM FRONT ALOFT WILL SLIDE OVERHEAD AND A
SHORT WAVE TRAVELING ALONG IT WILL DROP DOWN FROM THE NORTHWEST
TONIGHT. MEAGER MOISTURE MIGHT MAKE MEASURABLE SNOW OVER THE
NORTHERN TWO-THIRDS OF THE REGION. THE FEATURE DRIVING THE SNOW
WILL BE VERY FAST-MOVING AND THE TIMING AND HEIGHTS OVERHEAD AT
THE TIME OF PASSAGE WILL MAKE A BIG DIFFERENCE WHERE THE SNOW
FALLS. WILL BUMP POPS INTO LIKELIES FOR THE NRN HALF AND JUST A
LITTLE MORE WITH CHCS ELSEWHERE TO COVER THE UNCERTAINTIES. SNOW
AMOUNTS SHOULD BE ALMOST NIL ALONG THE MD BORDER...BUT COULD BE 2
INCHES ALONG AND NORTH OF I-80. TEMPS TONIGHT WILL DROP JUST 5-10F
WITH CLOUDS THICKENING UP AND LIGHT SOUTHERLY WINDS.

THE TEMPS ALOFT CONTINUE TO WARM ON SATURDAY...AND THE LEFTOVER
LIGHT SNOW IN THE EAST IN THE MORNING WILL BE SHUNTED OFF TO THE
EAST. LOW PRESSURE WILL PASS OVER LAKE SUPERIOR LATE
SATURDAY...AND WE WILL BE IN THE WARM SECTOR. HOWEVER...THE
SOUTHERLY WINDS...HIGHER DEWPOINT AIR AND MINORLY MELTING SNOW
WILL LIKELY LEAD TO SOME FOG AND LOW CLOUDS WHICH COULD BEAR
DRIZZLE/LIGHT RAIN. LIQUID PRECIP DEVELOPS OVER WRN AND NRN PA
LATE SAT AND ALMOST CERTAINLY ON SAT NIGHT. THE SFC TEMPS SAT
NIGHT COULD LEAD TO FREEZING RAIN OVER THE NRN TIER. WILL JUST ADD
IN A MENTION OF IT WITH THIS PKG BUT CALL IT RAIN ELSEWHERE.

&&

.LONG TERM /SUNDAY THROUGH THURSDAY/...
BROAD ZONAL FLOW DEVELOPS DURING THE WEEKEND. TEMPS WILL BE
REACHING INTO THE MID 40S TO MID 50S BY SUNDAY. 

MODELS SEEM TO BE BACK IN BETTER AGREEMENT ON APPROACH OF A FRONT
FOR MONDAY...THOUGH GFS/GEFS CONTINUE TO BE 6 TO MAYBE 12 HRS 
FASTER WITH FROPA THAN THE ECMWF.

POST FRONTAL WINDS WILL BRING COOLER TEMPS BACK IN FOR TUESDAY AS
LARGE SURFACE HIGH SLIDES ACROSS S CANADA. MDLS IN PRETTY GOOD
AGREEMENT ON LARGE FEATURES FOR NEXT WEEK. GFS DOES MAKE A MORE-
WET FRONTAL PASSAGE AT THE END OF THE WEEK...BUT ALL MDLS SEEM TO
BE LATCHING ONTO THE FROPA NEXT FRI.

&&

.AVIATION /12Z FRIDAY THROUGH TUESDAY/...
LAKE ENHANCED...OROGRAPHIC SNOW SHOWERS WILL BE THE PRIMARY
AVIATION CONCERN EARLY THIS MORNING ACROSS THE W MTNS. CAN/T RULE
OUT A BRIEF DIP TO IFR CONDS AT EITHER KBFD OR JST THIS MORNING.
HOWVEVER...RADAR TRENDS AND HRRR OUTPUT AT 11Z POINT TOWARD
IMPROVING CONDS. A RIDGE OF HIGH PRES BUILDING IN FROM THE OHIO
VALLEY SHOULD CAUSE ANY LINGERING -SHSN OVR THE W MTNS TO
DISSIPATE BY LATE AM...WITH WIDESPREAD VFR CONDS LIKELY BY THIS
AFTN. A WARM FRONT LIFTING INTO THE REGION COULD PRODUCE A PERIOD
OF LGT SNOW/REDUCED VSBYS LATE TONIGHT OR EARLY SAT AM OVER
NORTHERN PA. 

OUTLOOK...

SAT...AM LGT SNOW/REDUCED VSBYS POSS...MAINLY NORTH. LOW CIGS AT
KBFD POSS SAT NIGHT.

SUN...AM LOW CIGS/DZ POSS KBFD. 

MON...LOW CIGS/SHRA POSS...MAINLY W MTNS. 

TUE...NO SIG WX EXPECTED.

&&

.CTP WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

$$
SYNOPSIS...DANGELO
NEAR TERM...DANGELO
SHORT TERM...DANGELO
LONG TERM...DANGELO/RXR
AVIATION...FITZGERALD



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