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Area Forecast Discussion
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000
FXUS61 KCTP 272240
AFDCTP

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
640 PM EDT WED AUG 27 2014

.SYNOPSIS...
A COLD FRONT OVER NORTHERN PENNSYLVANIA WILL CLEAR THE SOUTHERN
TIER OF THE STATE EARLY TONIGHT. HIGH PRESSURE WILL ARRIVE BEHIND
THE FRONT AND BRING DRY WEATHER TO THE AREA THROUGH THE END OF THE
WEEK. ABOVE NORMAL TEMPERATURES AND INCREASINGLY HUMID AND
UNSETTLED CONDITIONS ARE FORECAST OVER THE LABOR DAY HOLIDAY
WEEKEND AND INTO THE FIRST WEEK OF SEPTEMBER.

&&

.NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
CAP IS LOCALLY STUBBORN...BUT SCATTERED COVERAGE OF SHOWERS AND
THUNDERSTORMS IS OCCURRING FROM PORTIONS OF THE CENTRAL MOUNTAINS
TO THE LAUREL HIGHLANDS AND ALSO OVER THE LYCOMING VALLEY HEADING
INTO THE MIDDLE SUSQUEHANNA RIVER VALLEY. MODEL FORECAST AND LAPS
SOUNDINGS HAVE INDICATED UP TO 2000 J/KG AVAILABLE...BUT TO THIS
POINT HAVE NOT SEEN STORMS OF THAT INTENSITY. ENVIRONMENTAL WINDS
ARE QUITE WEAK...BUT PULSING CELLS MAY LOCALLY PRODUCE STRONG TO
DAMAGING WIND GUSTS OVER THE NEXT FEW HOURS IN A FEW LOCATIONS
WITHIN THE AFOREMENTIONED AREAS.

THE FRONT AND DRIER AIR SHOULD ARRIVE IN THE CENTRAL COS AROUND
SUNSET AND MOVE OUT OF THE CWA HEADED SOUTH AROUND MIDNIGHT. SKIES
SHOULD CLEAR OUT NICELY BEHIND THE FRONT AND TEMPS COULD GET INTO
THE 40S IN THE NAN MTG. ALSO...DECOUPLING SHOULD OCCUR IN MOST
PLACES. THUS...YE OLDEN RIVER VALLEY FOG IS EXPECTED THERE. MINS
WILL PROBABLY STAY IN THE L60S IN THE SRN TIER.

&&

.SHORT TERM /6 AM THURSDAY MORNING THROUGH 6 PM THURSDAY/...
COOL POST-FRONTAL NW FLOW WILL MAKE FOR A MOSTLY SUNNY DAY OVER
MOST OF THE REGION. THE ONLY FLY IN THE OINTMENT MIGHT BE THE
APPROACH OF A LOWER CLOUD DECK FROM THE N/NE AS A STRONG PORT MAX
DROPS S ACROSS NY STATE. WILL KEEP POPS UP NEAR ISOLD NUMBERS IN
THE NE...BUT NOT MENTION PRECIP QUITE YET. A SPRINKLE IS POSSIBLE
IN THE NE THOUGH. MAXES WILL BE ABOUT 8-10F BELOW WEDNESDAY/S
LOFTY NUMBERS.

&&

.LONG TERM /THURSDAY NIGHT THROUGH WEDNESDAY/...
THE MEDIUM RANGE FLOW PATTERN WILL FEATURE TROUGHING IN THE WEST
AND FAIRLY HIGH HEIGHTS FCST TO PREVAIL OVER THE EAST SUPPORTED
BY A SUBTROPICAL RIDGE THAT SHOULD ANCHOR OVER THE SOUTHEAST. THIS
RIDGE WILL ALLOW HIGH PRESSURE TO CENTER OVER UPSTATE NY AT THE
START OF THE PERIOD. THIS WILL SLOWLY MOVE OFF THE NEW ENGLAND
COAST ON SATURDAY. A LONG FRONTAL BOUNDARY EXTENDING FROM AN UPPER
LEVEL LOW CENTERED OVER NORTHERN CANADA...AND TO A NEGATIVELY
TILTING TROUGH WHICH SHOULD BE MOVING INTO THE MIDWEST. THE
BIGGEST MOISTURE FROM THE FRONTAL BOUNDARY IS PROGGED TO STAY
NORTH OF PA.
 HOWEVER...THERE SHOULD BE ENOUGH MOISTURE...WITH ENOUGH FORCING
TO WARRANT INCREASING PROBABILITY/OPPORTUNITY FOR RAIN SATURDAY
NIGHT INTO EARLY MONDAY. DAYTIME CONVECTION WILL ALSO BE SPURRED
ON BY A WARMING TREND WITH MAX TEMPS 5-10F ABOVE NORMAL OVER THE
WEEKEND AND INTO THE FIRST WEEK OF SEPT. THE BEST CHANCE FOR
PRECIPITATION THROUGH THIS TIMEFRAME SHOULD BE SUNDAY AFTERNOON
INTO SUNDAY EVENING. THERE IS SOME MODEL VARIATION SO EXPECT SOME
MODIFICATIONS AS TIME PROGRESSES. A GFS AND EC IN THE LONG RANGE
ARE ACTUALLY IN FAIR AGREEMENT THROUGH THE FIRST HALF OF NEXT
WEEK...INCLUDING THE SUBSTANTIAL TROUGH THAT SHOULD MOVE THROUGH
WEDNESDAY AS MORE DEFINED COLD FRONT SHOULD APPROACHES THE AREA.

&&

.AVIATION /22Z WEDNESDAY THROUGH MONDAY/...
COLD FRONT APPEARS TO BE JUST THROUGH KBFD AT 18Z. ONE BATCH OF
TSRA OVER KAGC IS HEADED SOUTH OF KJST. ALL BUT KBFD WILL
CONTINUE TO HAVE THE POSSIBILITY FOR TSRA IN THE VCTY...BUT HAVE
ONLY INCLUDED VCSH/TS FOR NOW DUE TO SPARSE COVERAGE. THIS THREAT
SHOULD END AROUND 23Z-00Z IN IPT/UNV BUT COULD LINGER UNTIL 03Z IN
THE SRN TERMINALS. WIND SHIFT TO THE NW BEHIND THE FRONT WILL
BRING DRIER AND COOLER AIR. NORMAL VALLEY FOG IS EXPECTED IN THE
NRN VALLEYS AS THE TEMPS DROP OFF WELL BELOW THE RIVER WATER
TEMPS. BUT THERE COULD BE A LITTLE WIND WHICH COULD IMPEDE FOG
FORMATION. WILL PUT MVFR FOG IN MOST TAFS AND IFR FOG IN BFD FOR A
FEW HRS LATE TONIGHT. THE NW WINDS PICK UP AFTER SUNRISE BUT SKIES
AND VIS SHOULD BE VFR. A LOW-END VFR CLOUD DECK MAY DROP DOWN
FROM WRN NY STATE DURING THE DAYLIGHT HRS ON THURS.

 
OUTLOOK...
FRI-SAT...EARLY MORNING FOG RESTRICTIONS POSSIBLE...OTHERWISE
VFR.

SUN-MON...MAINLY VFR. SCT AFTERNOON SHOWERS/TSTMS.

&&

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

&&

$$
SYNOPSIS...DANGELO
NEAR TERM...DANGELO/DEVOIR
SHORT TERM...DANGELO
LONG TERM...CERU/STEINBUGL
AVIATION...DANGELO



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