Severe Thunderstorm Warning 141, NWS State College, PA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
428 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/...
FIRST FEW SHRA/TSRA NOW SHOWING UP OVER KPIT/KAGC AND OVER THE
KCCX SITE ITSELF ON TOP OF RATTLESNAKE RIDGE. COVERAGE IS STILL
EXPECTED TO BE RATHER SPARSE BUT THE BACKYARD LOOKS LIKE IT WILL
GET WET SOON. HRRR AND RAP STILL PLACE BIGGER CONCENTRATION OF
SHOWERS THIS EVENING WHERE LLVL CONVERGENCE IS BEST - OVER THE
NERO MTG AND POCONOS...AND IN THE LAURELS. HOWEVER...THE SHOWERS
IN BLACK  SHOW THAT THE HOT TEMPS TODAY ARE COOKING UP PLENTY OF
INSTABILITY. THE CAPES COULD BE HEALTHY ENOUGH TO MAKE SOME OF THE
STORMS TAP INTO SOME OF THE 35-40KT WINDS ALOFT. SPIC CONTINUES
TO MENTION AREA IN THE DAY1 OUTLOOK. SO...SOME MARGINAL WIND GUSTS
ARE STILL POSSIBLE...BUT NOT WIDESPREAD. THE COLD FRONT LAGS
BEHIND THE CURRENT CONVECTION AND WILL LIKELY FIRE UP MORE
ISOLD/SCT CONVECTION AS IT MOVES INTO THE MORE-HUMID AIR OVER THE
CENTRAL AND SERN COS. POPS IN THE CHC/SCT CATEGORY FOR ANY ONE
HOUR STILL SEEM LIKE THE BEST APPROACH.

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 /20Z 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
SHORT TERM...DANGELO
LONG TERM...CERU/STEINBUGL
AVIATION...DANGELO

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
548 AM EDT WED AUG 27 2014

PAZ004>006-010>012-017-018-024-025-033>035-281000-
WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD-
NORTHERN CENTRE-CAMBRIA-BLAIR-SOMERSET-BEDFORD-FULTON-
548 AM EDT WED AUG 27 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TODAY AND TONIGHT.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ019-026>028-036-037-041-042-045-046-049>053-056>059-063>066-
281000-
SOUTHERN CENTRE-HUNTINGDON-MIFFLIN-JUNIATA-FRANKLIN-TIOGA-
NORTHERN LYCOMING-SULLIVAN-SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-
SNYDER-MONTOUR-NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-
LEBANON-CUMBERLAND-ADAMS-YORK-LANCASTER-
548 AM EDT WED AUG 27 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TODAY AND TONIGHT.

SCATTERED THUNDERSTORMS MAY PRODUCE LOCALLY STRONG TO MARGINALLY
SEVERE WIND GUSTS AND HAIL THIS AFTERNOON AND EVENING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
544 PM EDT WED AUG 27 2014

PAZ052-053-272215-
NORTHUMBERLAND PA-COLUMBIA PA-
544 PM EDT WED AUG 27 2014

...A STRONG THUNDERSTORM IS AFFECTING THE AREA...

AT 543 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR
STONINGTON...MOVING SOUTHEAST AT 20 MPH.

50 MPH WIND GUSTS AND DIME SIZE HAIL ARE POSSIBLE WITH THIS STORM.

THIS STRONG THUNDERSTORM WILL BE NEAR...
  ELYSBURG AND TREVORTON AROUND 600 PM EDT.
  SHAMOKIN...MOUNT CARMEL...KULPMONT...FAIRVIEW-FERNDALE...
MARSHALLTON AND KNOEBELS GROVE AROUND 610 PM EDT.

OTHER LOCATIONS IMPACTED BY THIS STORM INCLUDE EDGEWOOD...MARION
HEIGHTS AND SNYDERTOWN.

LAT...LON 4083 7634 4072 7659 4091 7676 4096 7665
      4092 7656 4091 7657 4088 7655 4088 7653
      4091 7652
TIME...MOT...LOC 2143Z 308DEG 16KT 4088 7667

EVANEGO

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
614 PM EDT WED AUG 27 2014

PAZ046-051-053-272245-
COLUMBIA PA-SOUTHERN LYCOMING PA-MONTOUR PA-
614 PM EDT WED AUG 27 2014

...A STRONG THUNDERSTORM IS AFFECTING THE AREA...

AT 613 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
HUGHESVILLE...MOVING EAST AT 20 MPH.

50 MPH WIND GUSTS AND DIME SIZE HAIL ARE POSSIBLE WITH THIS STORM.

THIS STRONG THUNDERSTORM WILL BE NEAR...
  LAIRDSVILLE AND EXCHANGE AROUND 630 PM EDT.
  JERSEYTOWN...IOLA AND BIGGERTOWN AROUND 640 PM EDT.

OTHER LOCATIONS IMPACTED BY THIS STORM INCLUDE MILLVILLE.

THIS INCLUDES INTERSTATE 180 BETWEEN MILE MARKERS 10 AND 14.

LAT...LON 4104 7658 4113 7673 4117 7673 4118 7679
      4118 7683 4127 7677 4125 7645
TIME...MOT...LOC 2213Z 288DEG 18KT 4121 7674

EVANEGO