Severe Thunderstorm Warning 64, NWS State College, PA

912 
WWUS51 KCTP 112247
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
647 PM EDT THU JUN 11 2015

PAC075-112345-
/O.CON.KCTP.SV.W.0064.000000T0000Z-150611T2345Z/
LEBANON PA-
647 PM EDT THU JUN 11 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR SOUTHERN LEBANON COUNTY...

AT 647 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING HALF DOLLAR SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60
MPH. THIS STORM WAS LOCATED OVER PLEASANT HILL...MOVING EAST AT 20
MPH.

LOCATIONS IMPACTED INCLUDE...
ANNVILLE...CORNWALL...LEBANON...MYERSTOWN...PALMYRA...AVON...
CAMPBELLTOWN...CLEONA...KLEINFELTERSVILLE...MOUNT GRETNA HEIGHTS...
NEWMANSTOWN...PLEASANT HILL...QUENTIN...RICHLAND...SAND HILL...
SCHAEFFERSTOWN...SOUTH LEBANON...TIMBER HILLS...AVON HEIGHTS AND
MOUNT GRETNA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4029 7622 4025 7631 4024 7643 4024 7648
      4028 7660 4035 7650 4044 7638 4042 7631
      4037 7625 4036 7620 4034 7618
TIME...MOT...LOC 2247Z 291DEG 16KT 4034 7645 

$$

LA CORTE

583 
WWUS51 KCTP 112311
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
711 PM EDT THU JUN 11 2015

PAC075-112345-
/O.CON.KCTP.SV.W.0064.000000T0000Z-150611T2345Z/
LEBANON PA-
711 PM EDT THU JUN 11 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR SOUTHEASTERN LEBANON COUNTY...

AT 710 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60
MPH. THIS STORM WAS LOCATED OVER SOUTH LEBANON...MOVING SOUTHEAST AT
10 MPH.

THE STORM HAS SHOWN SIGNS OF WEAKENING...AND THE WARNING MAY BE 
CANCELED IF THIS TREND CONTINUES.

LOCATIONS IMPACTED INCLUDE...
MYERSTOWN...KLEINFELTERSVILLE...NEWMANSTOWN...RICHLAND AND
SCHAEFFERSTOWN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4029 7622 4027 7635 4037 7635 4037 7625
      4036 7620 4034 7618
TIME...MOT...LOC 2310Z 294DEG 8KT 4032 7639 

$$

LA CORTE

006 
WWUS51 KCTP 112320
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
720 PM EDT THU JUN 11 2015

PAC075-112329-
/O.CAN.KCTP.SV.W.0064.000000T0000Z-150611T2345Z/
LEBANON PA-
720 PM EDT THU JUN 11 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LEBANON COUNTY IS
CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS WEAKENED. 
THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 4029 7622 4027 7635 4037 7635 4037 7625
      4036 7620 4034 7618
TIME...MOT...LOC 2317Z 294DEG 8KT 4031 7636 

$$

LA CORTE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
354 PM EDT THU JUN 11 2015

.SYNOPSIS...
A WEAK COLD FRONT WILL BE STATIONARY JUST NORTH OF THE INTERSTATE
80 CORRIDOR INTO FRIDAY MORNING...ACTING AS THE FOCUS FOR
ISOLATED-SCATTERED MID AFTERNOON THROUGH EARLY EVENING SHOWERS AND
THUNDERSTORMS. THIS FRONT WILL DRIFT SLOWLY BACK TO THE NORTH AS A
WARM FRONT ON FRIDAY...KEEPING MUCH OF CENTRAL AND SOUTHERN
PENNSYLVANIA IN A VERY WARM AND RATHER HUMID AIRMASS.
ANOTHER...SLIGHTLY STRONGER COLD FRONT WILL PUSH SOUTHEAST ACROSS
THE REGION DURING THE MORNING AND MIDDAY HOURS SATURDAY. LOWER
HUMIDITY AND NEAR NORMAL TEMPERATURES WILL FOLLOW FOR SATURDAY
AFTERNOON THROUGH SUNDAY BEHIND THE FRONT. PERSISTENT WESTERLY
FLOW FROM THE WESTERN GLAKES TO PENNSYLVANIA WILL BRING A FEW MORE
WEAK DISTURBANCES AND CHANCES FOR MAINLY AFTERNOON AND EARLY
EVENING THUNDERSTORMS MONDAY AND TUESDAY.

&&

.NEAR TERM /UNTIL 8 PM THIS EVENING/...
FRONTAL BOUNDARY ANALYZED AT 18Z RIGHT ALONG THE LENGTH OF INTERSTATE
80 ACROSS PRACTICALLY ALL OF PENN. A SLIGHT SWD DRIFT TO THIS
FRONT IS POSSIBLE LATE TODAY AND TONIGHT.

FCST SOUNDINGS /AND VISUAL INTERROGATION OF THE CU OUT THE WINDOW/ SHOW
THAT THE LFC IS BEING REACHED ATTM AS CU ARE SHOWING SOME VERTICAL
DVLPMT /BUT STILL BEING PINCHED OFF/. THIS SHOULD CHANGE OVER THE
NEXT HOUR AS AN ADDITIONAL FEW DEG F OF HEATING AND CLOSE
PROXIMITY OF THE FRONT AND IT'S WEAK-MDT LLVL THETA-E CONVERGENCE
HELPS THE CU TO PENETRATE THE WEAK MID-LEVEL CAP AND GROW INTO
ISOLATED-SCT TSRA.

MORE TRUST IN HRRR MODEL /AND IT'S TIME AND PLACEMENT OF
CONVECTION/ THAN YESTERDAY/S MIDDAY RUNS...BASED ON MID LEVEL
TEMPS/CAPPING BEING ABOUT 2-3C LOWER. ALL OTHER OPERATION GUIDANCE
AND 03Z SREF POINTS TWD WCENT PENN...EAST TO THE MID SUSQ VALLEY
AND SRN POCONOS /NEAR AND JUST SOUTH OF I-80/ BEING THE CROSS-
HAIRS FOR SCTD SHRA AND ISOLATED...TALL PULSE TSRA. FIRST TIME
THIS YEAR...I RECALL SEEING SOME LOW END CHANCES /30-40 PERCENT/
FOR CAPE ABOVE 3000 J/KG ON THE SREF HERE IN CENTRAL PENN.

VERY INTERESTING TO NOTE THE DISTINCT COLD POOLS DEVELOPED BY THE
HRRR FROM THE CONVECTION DURING THE MID TO LATE AFTERNOON HOURS.
WE KNOW THAT STORMS WILL FAIRLY EASILY BREAK THE MID-LEVEL CAP
THIS AFTERNOON...AND WILL SEE TSRA ON RADAR. THE BILLION DOLLAR
QUESTION IS EXACTLY WHEN AND WHERE.

STILL PPINE AS OF 18Z...HOWEVER...THE LATEST 16Z HRRR RUN
CONTINUES TO INDICATE THAT THE FIRST STORMS SHOULD DEVELOP OVER
THE HIGHER TERRAIN NEAR I-80 AND INVOF KDUJ AND KFIG BETWEEN
18-19Z...THEN PROPAGATE GENERALLY TO THE EAST. SOME DEVIANT CELL
MOTION TO THE NE OR SE IS LIKELY...ESPECIALLY INVOF THE LARGER
COLD POOLS.

WESTERLY LOW/MID LEVEL WINDS WILL BE IN THE 25-30KT RANGE THROUGH
THE REST OF DAY. CAPES FROM SOME MDLS ARE GIANT - 2500-3000 J/KG
IN THE CENTRAL COS. THE FRONT SETTLES SOUTHWARD FROM IT/S SEEMING
CURRENT W-E POSITION OVER THE NRN TIER. MDLS AGREE THAT THE
BOUNDARY WILL MOVE ONLY SLIGHTLY SOUTHWARD KEEPING THE W-E
ORIENTATION. THEREFORE...THE HIGHER 35-40 POPS WILL BE DRAWN OVER
FIG-UNV-SEG-MUI.

THE STRONGER CAP IN PLACE OVER THE SRN TIER...AND GREATER DISTANCE
FROM THE FRONT WILL LIKELY THWART MOST ATTEMPTS TO GENERATE DEEP
CONVECTION THERE. SO...LOWER POPS THERE. THE LACK OF MOISTURE
NORTH OF THE FRONT WILL KEEP POPS LOWER IN THE NORTHERN TIER AS
WELL.

TEMPS ON TRACK TO TRY TO TICKLE RECORD HIGHS FOR THE DATE...BUT
WILL LIKELY FALL 1-3 DEG F SHORT. PLACES ALONG THE MASON- DIXON
LINE WILL GET VERY CLOSE TO 90F. HRRR SHOWS TEMPS NEAR 90F EVEN
THROUGHOUT THE VALLEYS OF CENTRAL PENN...WHILE THE NORTHERN MTNS
GET CLOSE TO 80F.

&&

.SHORT TERM /8 PM THIS EVENING THROUGH 6 PM FRIDAY/...
ANY ISOLATED-SCT CONVECTION STRUNG OUT NEAR THE I-80 CORRIDOR SHOULD
WANE IN THE EARLY EVENING WITH NO SUPPORT FROM ANY SIG JET STREAK
OR LLVL WINDS/MOISTURE ADVECTION. THE QUASI STNRY FRONT SLIDES
NORTHWARD A BIT AND COULD MAKE A SPRINKLE IN THE N/W. MORE-
CERTAINLY...THE WARM TEMPERATURES AND SLIGHT MUGGINESS WILL
CONTINUE THROUGH THE SHORT TERM.

OVERNIGHT TEMPS WILL STAY MILD/WARM WITH MINS IN THE L-MID 60S
CENTRAL AND SOUTHERN PENN...AND IN THE MID TO UPPER 50S ACROSS THE
NORTH TIER OF PENN.

HEIGHTS DO NOT CHANGE AT ALL FRIDAY...SO POPS SHOULD BE LOWER IN
THE S...BUT ELEVATED HEATING SURFACES - LIKE THE LAURELS - MAY
PROVIDE ENOUGH LIFT TO POP SCT T/SHRA. THE DEEP MIXING ON FRIDAY
WILL PUSH THE 8H TEMPS TO 20C. MAXES IN THE 90S ARE EXPECTED IN
THE LOWER ELEVATIONS...AND 80S EVEN ON THE HILL TOPS OF NRN PENN.

THE NEXT COLD FRONT APPROACHES FROM THE GLAKES BRINGING MODERATE
CHCS FOR LATE AFTERNOON/EVENING SHRA/TSRA ACROSS NW PENN.
ISOLATED-SCTD LATE DAY/EVENING SHRA AND TSRA WILL OCCUR LATE FRI
AND FRI NIGHT ACROSS THE CENTRAL ZONES AND SUSQ VALLEY.

&&

.LONG TERM /FRIDAY NIGHT THROUGH THURSDAY/...
SUBTROPICAL LONGWAVE RIDGE...BERMUDA HIGH...IS FORECAST TO BUILD
NWD ALONG THE EASTERN U.S. BY THE WEEKEND AND MAINTAIN POSITION
INTO NEXT WEEK. VERY WARM AND HUMID WEATHER LOOKS TO BE THE RULE FOR
THE REGION THROUGH THE PERIOD. PAINTED GENERALLY CHANCE POPS EACH
DAY WITH AS MUCH CONFIDENCE AS POSSIBLE. SEVERAL CHANCES FOR
HIGHER POPS LOOK TO EXIST DURING THE PERIOD AS OUTLINED NEXT.

A WEAKENING MID LVL TROUGH IS FCST TO MOVE ENEWD ACROSS THE GREAT
LAKES/NORTHEAST INTO SATURDAY AND SHOULD PUSH A FRONTAL BOUNDARY
ALONG THE LOWER LAKES SWD INTO CENTRAL PA. SCT TSTMS SHOULD
DEVELOP ALONG/AHEAD OF THE SLOW MOVG BOUNDARY WITH A MODEL
CONSENSUS FAVORING THE CENTRAL/SOUTHERN PORTIONS OF THE CWA. THE
BUILDING RIDGE TO THE SOUTH LOOKS LIKE IT WILL HOLD THE
WAVY/INCREASINGLY DIFFUSE FRONT INVOF THE MASON DIXON LINE. THERE
IS SOME QUESTION AS TO HOW MUCH DRY AIR ARRIVES BEHIND THE FRONT
AS THE GEFS FCSTS A NOTABLE DROP IN PWATS SAT NGT-SUN BEFORE
ANOMALOUS MSTR/PWATS SURGE BACK INTO THE REGION EARLY NEXT WEEK.
WOULD NOT BE SURPRISED TO SEE AN MCS TYPE COMPLEX MOVE THROUGH THE
AREA NEXT WEEK BUT CONFIDENCE IS LOW IN THE DETAILS ESPECIALLY AT
THIS RANGE.

&&

.AVIATION /20Z THURSDAY THROUGH TUESDAY/...
A NEARLY STATIONARY FRONTAL BOUNDARY WILL STAY STRETCHED OUT ALONG
MUCH OF INTERSTATE 80 IN PENN LATE TODAY AND TONIGHT.

THIS FRONT COULD TRIGGER ISOLATED-SCATTERED LATE DAY/EARLY EVENING
TSRA IN THE VICINITY OF KAOO- KFIG- KUNV- KSEG.

INCLUDED MENTION OF VCTS IN SEVERAL CENTRAL PENN TAFS THROUGH
ABOUT 00Z FRIDAY.

LATER TONIGHT...LIGHT WIND WILL COMBINE WITH HIGH DEWPOINT AIR AND
DECENT RADIATIONAL COOLING OF THE GROUND TO PRODUCE AREAS OF MVFR
HAZE/FOG AND PERHAPS SOME PATCHY MVFR STRATUS/STRATO CU.

OUTLOOK...

FRI...AREAS OF MVFR VSBYS POSSIBLE UNTIL AROUND 12Z...THEN VFR
WITH ISOLD PM TSRA IMPACTS POSS...MAINLY NW MTNS AS A COLD FRONT
APPROACHES FROM THE GREAT LAKES REGION

SAT...ISOLD PM TSRA IMPACTS POSS...MAINLY SOUTH.

SUN...NO SIG WX EXPECTED.

MON...PM TSRA IMPACTS POSSIBLE...MAINLY W MTNS.

&&

.CLIMATE...
FCST HIGH TEMPERATURES THIS AFTERNOON AND FRIDAY ARE IN THE UPPER
80S TO AROUND 90 DEGREES FOR BOTH HARRISBURG AND WILLIAMSPORT.
THIS IS WITHIN A FEW DEGREES OF RECORDS FOR EACH DATE.

FOR TODAY...RECORD HIGH IS 92 IN HARRISBURG AND 93 IN
WILLIAMSPORT /BOTH SET IN 1925/.

FOR FRIDAY...RECORD HIGH IS 91 IN HARRISBURG AND 92 IN
WILLIAMSPORT /BOTH SET IN 1925/.

&&

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

&&

SYNOPSIS...LAMBERT
NEAR TERM...LAMBERT
SHORT TERM...DANGELO
LONG TERM...GARTNER/STEINBUGL
AVIATION...FITZGERALD/LAMBERT
CLIMATE...

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
558 AM EDT THU JUN 11 2015

PAZ017>019-024>028-045-046-049>053-056>059-063-121000-
CLEARFIELD-NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA-BLAIR-HUNTINGDON-
MIFFLIN-JUNIATA-SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-SNYDER-
MONTOUR-NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-
CUMBERLAND-
558 AM EDT THU JUN 11 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TODAY AND TONIGHT.

SCATTERED AFTERNOON THUNDERSTORMS MAY PRODUCE GUSTY WINDS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

SCATTERED AFTERNOON THUNDERSTORMS MAY PRODUCE GUSTY WINDS ON
FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ004-121000-
WARREN-
558 AM EDT THU JUN 11 2015

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...FRIDAY THROUGH WEDNESDAY.

A SLIGHT RISK OF SEVERE THUNDERSTORMS EXISTS ON FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ005-006-010>012-033>037-041-042-064>066-121000-
MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-SOMERSET-BEDFORD-FULTON-
FRANKLIN-TIOGA-NORTHERN LYCOMING-SULLIVAN-ADAMS-YORK-LANCASTER-
558 AM EDT THU JUN 11 2015

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...FRIDAY THROUGH WEDNESDAY.

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
441 PM EDT THU JUN 11 2015

PAZ028-050-052-056-057-112115-
JUNIATA PA-SNYDER PA-DAUPHIN PA-PERRY PA-NORTHUMBERLAND PA-
441 PM EDT THU JUN 11 2015

...THUNDERSTORMS WILL AFFECT JUNIATA...SNYDER...DAUPHIN...PERRY...AND
NORTHUMBERLAND COUNTIES UNTIL 515 PM EDT...

AT 439 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS ALONG A LINE
EXTENDING FROM NEAR KREAMER TO NEAR MILLERSBURG...AND MOVING
EAST AT 15 MPH.

TORRENTIAL RAIN...40 MPH WIND GUSTS AND NICKEL SIZE HAIL WILL BE
POSSIBLE WITH THESE THUNDERSTORMS.

THE HEAVY RAIN WILL BE NEAR...
  SELINSGROVE AND HUMMELS WHARF AROUND 450 PM EDT.
  PORT TREVORTON AROUND 455 PM EDT.
  MILLERSBURG AROUND 500 PM EDT.

OTHER LOCATIONS IMPACTED BY THE HEAVY RAIN INCLUDE BERRYSBURG...
DALMATIA...EDGEWOOD...ENDERS AND FREEBURG.

LAT...LON 4069 7662 4066 7670 4063 7665 4043 7675
      4056 7711 4084 7698 4083 7655
TIME...MOT...LOC 2039Z 293DEG 15KT 4080 7694 4057 7707

LA CORTE

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
538 PM EDT THU JUN 11 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0459 PM     TSTM WND DMG     1 S SELINSGROVE JUNCTIO 40.79N  76.84W
06/11/2015                   NORTHUMBERLAND     PA   911 CALL CENTER

            ONE TREE DOWN.

&&

EVENT NUMBER CTP1500117

JMC