Severe Thunderstorm Warning 159, NWS State College, PA

CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
255 PM EDT SAT JUL 15 1995

REMAINS OF THE COLD FRONT EXTEND FROM CAPE COD WEST ACROSS CENTRAL
PA TO NORTHERN OH AT 18Z.  SATELLITE SHOWED SUPPRESSION OF THE
CLOUDS ACROSS PA BEHIND THE BOUNDARY THAT ADVECTED OUT AHEAD OF THE
EARLY MORNINGS CONVECTION...DESPITE THE INCREDIBLE INSTABILITY ON
MORNING RAOB.  THERE IS EVIDENCE THAT THE BOUNDARY MOVED SOUTH AND
SOUTHWEST ACROSS THE STATE REACHING INTO OH THIS AFTERNOON.  NVA
QUITE EVIDENT ALOFT ACROSS WESTERN PA THIS AFTERNOON AND ALSO FAIR
INDICATION OF ANTICYCLONIC TURNING IN THE CLOUD MOTION ON THE
SATELLITE.  THIS PROBABLY ACCOUNTS FOR THE LACK OF CONVECTION
ACROSS THE AREA.

THUNDERSTORMS HAVE EXPLODED OUT AHEAD OF THE UPPER SHORT WAVE THAT
IS MOVING NORTHEAST FROM KENTUCKY INTO OH.  THAT SAME UPPER WAVE IS
PROGGED TO MOVE NORTHEAST AND SPREAD INTO WESTERN PA OVERNIGHT.
BEST CHANCE FOR STRONG THUNDERSTORMS WILL BE AFT MIDNIGHT HERE IN
CENTRAL PA.  DOES APPEAR THAT WE/VE HIT THE PEAK OF THE HEAT WAVE
AND AS THE SURFACE RIDGE BUILDS SOUTH OVERNIGHT THAT JUST A BIT
LESS HEAT AND HUMIDITY WILL BE OVER MOST OF THE AREA.  CONCUR WITH
NEED TO KEEP THE AXDVISORY UP UNTIL THUNDERSTORMS MOVE IN TONIGHT.

TED

PAZ004>006-010>012-017>019-024>028-033>036-037-041-042-045-046-
049>053-056>059-063>066-160600-

SPECIAL WEATHER STATEMENT - EXCESSIVE HEAT ADVISORIES/WARNINGS
NATIONAL WEATHER SERVICE STATE COLLEGE PA
330 PM EDT SAT JUL 15 1995

...EXCESSIVE HEAT ADVISORIES CONTINUE FOR MOST OF SOUTH CENTRAL
PENNSYLVANIA AND THE MIDDLE AND LOWER SUSQUEHANNA VALLEY THROUGH
THIS EVENING...

COUNTIES AFFECTED INCLUDE...

IN SOUTH CENTRAL PENNSYLVANIA...

BLAIR... BEDFORD... HUNTINGDON... MIFFLIN... JUNIATA.... FULTON
AND FRANKLIN.

IN THE SUSQUEHANNA VALLEY REGION...
SOUTHERN CLINTON... SOUTHERN LYCOMING... UNION...  SNYDER...
MONTOUR...

NORTHUMBERLAND...  COLUMBIA... PERRY... DAUPHIN... LEBANON...
CUMBERLAND... ADAMS... YORK... AND LANCASTER.

EXCESSIVE HEAT ADVISORIES REMAIN UP FOR MUCH OF SOUTH CENTRAL
PENNSYLVANIA THIS EVENING AS THE HEAT AND HUMIDITY PEAKS TODAY.
ONLY THE AREAS CLOSE TO LAKE ERIE ESCAPED 90 DEGREE TEMPERATURES
BY MID AFTERNOON.   WILLIAMSPORT REACHED 101 AT 3 PM WITH A HEAT
INDEX OF 116.  HARRISBURG WAS 98 WITH AN INDEX OF 121 AND
PHILADELPHIA TOPPED ALL AREAS WITH A TEMPERATURE OF 103 AND AN
INDEX OF 121.   ASIDE FROM NEAR LAKE ERIE...BRADFORD IN THE
NORTHERN MOUNTAINS WAS 90 WITH A HEAT INDEX OF 96.

HEAT EXHAUSTION AND BODY CRAMPS CAN OCCUR WHEN THE HEAT INDEX IS
AT OR ABOVE 105 DEGREES.  PROLONGED EXPOSURE COULD LEAD TO HEAT
STROKE.  SO...TAKE IT EASY THIS EVENING...AVOID STRESSFUL
ACTIVITIES... AND STAY OUT OF THE SUN AS MUCH AS POSSIBLE.  DRINK
PLENTY OF LIQUIDS... PREFERABLY WATER...AND AVOID HOT BEVERAGES
AND ALCOHOL.

THE HIGH HEAT INDEX TEMPERATURES HAVE REACHED THEIR PEAK TODAY
AND WE SHOULD SEE SOME IMPROVEMENT OVERNIGHT...AND THROUGH THE
DAY SUNDAY.  IT WILL STILL BE VERY UNPLEASANT THROUGH THE EVENING
...BUT OVERNIGHT LOWS SHOULD FALL INTO THE LOW AND MID 70S IN THE
SOUTH AND UPPER 60S IN THE NORTH.

DUNHAM

PAZ004>006-010>012-017>019-024>028-033>036-037-041-042-045-046-
049>053-056>059-063>066-160600-

SPECIAL WEATHER STATEMENT - EXCESSIVE HEAT ADVISORIES/WARNINGS
NATIONAL WEATHER SERVICE STATE COLLEGE PA
330 PM EDT SAT JUL 15 1995

...EXCESSIVE HEAT ADVISORIES CONTINUE FOR MOST OF SOUTH CENTRAL
PENNSYLVANIA AND THE MIDDLE AND LOWER SUSQUEHANNA VALLEY THROUGH
THIS EVENING...

COUNTIES AFFECTED INCLUDE...

IN SOUTH CENTRAL PENNSYLVANIA...

BLAIR... BEDFORD... HUNTINGDON... MIFFLIN... JUNIATA.... FULTON
AND FRANKLIN.

IN THE SUSQUEHANNA VALLEY REGION...
SOUTHERN CLINTON... SOUTHERN LYCOMING... UNION...  SNYDER...
MONTOUR...

NORTHUMBERLAND...  COLUMBIA... PERRY... DAUPHIN... LEBANON...
CUMBERLAND... ADAMS... YORK... AND LANCASTER.

EXCESSIVE HEAT ADVISORIES REMAIN UP FOR MUCH OF SOUTH CENTRAL
PENNSYLVANIA THIS EVENING AS THE HEAT AND HUMIDITY PEAKS TODAY.
ONLY THE AREAS CLOSE TO LAKE ERIE ESCAPED 90 DEGREE TEMPERATURES
BY MID AFTERNOON.   WILLIAMSPORT REACHED 101 AT 3 PM WITH A HEAT
INDEX OF 116.  HARRISBURG WAS 98 WITH AN INDEX OF 121 AND
PHILADELPHIA TOPPED ALL AREAS WITH A TEMPERATURE OF 103 AND AN
INDEX OF 121.   ASIDE FROM NEAR LAKE ERIE...BRADFORD IN THE
NORTHERN MOUNTAINS WAS 90 WITH A HEAT INDEX OF 96.

HEAT EXHAUSTION AND BODY CRAMPS CAN OCCUR WHEN THE HEAT INDEX IS
AT OR ABOVE 105 DEGREES.  PROLONGED EXPOSURE COULD LEAD TO HEAT
STROKE.  SO...TAKE IT EASY THIS EVENING...AVOID STRESSFUL
ACTIVITIES... AND STAY OUT OF THE SUN AS MUCH AS POSSIBLE.  DRINK
PLENTY OF LIQUIDS... PREFERABLY WATER...AND AVOID HOT BEVERAGES
AND ALCOHOL.

THE HIGH HEAT INDEX TEMPERATURES HAVE REACHED THEIR PEAK TODAY
AND WE SHOULD SEE SOME IMPROVEMENT OVERNIGHT...AND THROUGH THE
DAY SUNDAY.  IT WILL STILL BE VERY UNPLEASANT THROUGH THE EVENING
...BUT OVERNIGHT LOWS SHOULD FALL INTO THE LOW AND MID 70S IN THE
SOUTH AND UPPER 60S IN THE NORTH.

DUNHAM

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SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
705 PM EDT SAT JUL 15 1995

PAZ004>006-010>012-017>019-024>028-033>036-037-041-042-045-046-
049>053-056>059-063>066-160500-
WARREN-MCKEAN-ELK-CAMERON-POTTER-CLEARFIELD-NORTHERN CLINTON-
CENTRE-CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-JUNIATA-SOMERSET-BEDFORD-
FULTON-FRANKLIN-TIOGA-LYCOMING-SULLIVAN-SOUTHERN CLINTON-
UNION-NORTHUMBERLAND-MONTOUR-COLUMBIA-SCHUYLKILL-SNYDER-
PERRY-DAUPHIN-CUMBERLAND-LEBANON-ADAMS-YORK-LANCASTER-

...SEVERE THUNDERSTORM WATCH...

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH
VALID UNTIL MIDNIGHT FOR MUCH OF NORTHEASTERN PENNSYLVANIA TO
INCLUDE THE FOLLOWING COUNTIES...
TIOGA  SULLIVAN  LYCOMING  UNION  MONTOUR  COLUMBIA  SNYDER
NORTHUMBERLAND  SCHUYLKILL  JUNIATA  PERRY  DAUPHIN AND LEBANON.

A SEVERE THUNDERSTORM WATCH IS ALSO IN EFFECT UNTIL 1 AM FOR THE
FOLLOWING COUNTIES IN WESTERN PENNSYLVANIA...
WARREN  MC KEAN  POTTER  ELK  CAMERON  CLEARFIELD  CLINTON  CENTRE
CAMBRIA  BLAIR  HUNTINGDON  SOMERSET  AND  BEDFORD.

A FLASH FLOOD WATCH IS IN EFFECT FOR THE FOLLOWING COUNTIES UNTIL
10 PM...CAMBRIA AND SOMERSET.

HOT HUMID AND VERY UNSTABLE AIR OVER THE REGION IS PROVIDING THE
INGREDIENTS FOR SEVERE THUNDERSTORMS AND POTENTIALLY FLOODING
RAINS. THE STORMS HAVE THE POTENTIAL TO DEVELOP RAPIDLY AND CAN
BECOME SEVERE IN A VERY SHORT TIME.

LA CORTE

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
705 PM EDT SAT JUL 15 1995

PAZ004>006-010>012-017>019-024>028-033>036-037-041-042-045-046-
049>053-056>059-063>066-160500-
WARREN-MCKEAN-ELK-CAMERON-POTTER-CLEARFIELD-NORTHERN CLINTON-
CENTRE-CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-JUNIATA-SOMERSET-BEDFORD-
FULTON-FRANKLIN-TIOGA-LYCOMING-SULLIVAN-SOUTHERN CLINTON-
UNION-NORTHUMBERLAND-MONTOUR-COLUMBIA-SCHUYLKILL-SNYDER-
PERRY-DAUPHIN-CUMBERLAND-LEBANON-ADAMS-YORK-LANCASTER-

...SEVERE THUNDERSTORM WATCH...

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH
VALID UNTIL MIDNIGHT FOR MUCH OF NORTHEASTERN PENNSYLVANIA TO
INCLUDE THE FOLLOWING COUNTIES...
TIOGA  SULLIVAN  LYCOMING  UNION  MONTOUR  COLUMBIA  SNYDER
NORTHUMBERLAND  SCHUYLKILL  JUNIATA  PERRY  DAUPHIN AND LEBANON.

A SEVERE THUNDERSTORM WATCH IS ALSO IN EFFECT UNTIL 1 AM FOR THE
FOLLOWING COUNTIES IN WESTERN PENNSYLVANIA...
WARREN  MC KEAN  POTTER  ELK  CAMERON  CLEARFIELD  CLINTON  CENTRE
CAMBRIA  BLAIR  HUNTINGDON  SOMERSET  AND  BEDFORD.

A FLASH FLOOD WATCH IS IN EFFECT FOR THE FOLLOWING COUNTIES UNTIL
10 PM...CAMBRIA AND SOMERSET.

HOT HUMID AND VERY UNSTABLE AIR OVER THE REGION IS PROVIDING THE
INGREDIENTS FOR SEVERE THUNDERSTORMS AND POTENTIALLY FLOODING
RAINS. THE STORMS HAVE THE POTENTIAL TO DEVELOP RAPIDLY AND CAN
BECOME SEVERE IN A VERY SHORT TIME.

LA CORTE