Severe Thunderstorm Warning 239, NWS State College, PA

778 
WWUS51 KCTP 270854
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
454 AM EDT TUE SEP 27 2011

PAC009-013-021-111-270930-
/O.CON.KCTP.SV.W.0239.000000T0000Z-110927T0930Z/
BEDFORD PA-BLAIR PA-CAMBRIA PA-SOMERSET PA-
454 AM EDT TUE SEP 27 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 AM EDT
FOR NORTHEASTERN SOMERSET...CAMBRIA...BLAIR AND NORTHWESTERN BEDFORD
COUNTIES...

AT 451 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR WINDBER...MOVING
NORTHEAST AT 35 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  DUNLO AND SIDMAN...
  BEAVERDALE AND SUMMERHILL...
  SPRING HILL AND PORTAGE...
  CASSANDRA AND SKI GAP...
  LILLY AND COLVER...
  TUNNELHILL AND GALLITZIN...

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 119 AND 123...I-99 BETWEEN
MILE MARKERS 11 AND 39.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...THE JOHNSTOWN
EXPRESSWAY...ROUTE 22...ROUTE 30...ROUTE 219...ROUTE 220...ROUTE
422...STATE ROAD 56.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2.

&&

LAT...LON 3991 7892 4029 7901 4073 7873 4073 7858
      4047 7814 4038 7820
TIME...MOT...LOC 0855Z 223DEG 29KT 4027 7876

$$

FORECASTER: CERU

927 
WWUS51 KCTP 270911
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
511 AM EDT TUE SEP 27 2011

PAC009-013-021-111-270930-
/O.CON.KCTP.SV.W.0239.000000T0000Z-110927T0930Z/
BEDFORD PA-BLAIR PA-CAMBRIA PA-SOMERSET PA-
511 AM EDT TUE SEP 27 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 AM EDT
FOR NORTHEASTERN SOMERSET...CAMBRIA...BLAIR AND NORTHWESTERN BEDFORD
COUNTIES...

AT 509 AM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR SPRING HILL...OR NEAR PORTAGE...MOVING NORTHEAST AT 35 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  LILLY AND COLVER...
  TUNNELHILL AND GALLITZIN...
  HORSESHOE CURVE AND DUNCANSVILLE...

THIS WILL IMPACT I-99 BETWEEN MILE MARKERS 11 AND 39.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 22...ROUTE
30...ROUTE 219...ROUTE 220...ROUTE 422.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2.

&&

LAT...LON 4002 7882 4039 7889 4073 7873 4073 7858
      4047 7814 4038 7820 4004 7873
TIME...MOT...LOC 0911Z 223DEG 29KT 4036 7864

$$

FORECASTER: CERU

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
253 AM EDT TUE SEP 27 2011

.SYNOPSIS...
A CLOSED UPPER LOW OVER THE MIDWEST WILL SLOWLY MOVE TO THE EAST
THROUGH THE WEEK. A SERIES OF COLD FRONTS WILL MOVE ACROSS THE
REGION DURING THE MIDDLE TO LATTER PART OF THE WEEK. THIS WILL
KEEP THE WEATHER UNSETTLED WITH A GRADUAL COOLING TREND THROUGH
THE WEEK. THE TEMPERATURES WILL END UP MUCH COLDER THAN NORMAL FOR
THE WEEKEND...BUT SHOULD WARM BACK UP EARLY NEXT WEEK AS BROAD
HIGH PRESSURE SETTLES OVER THE CAROLINA COAST.

&&

.NEAR TERM /UNTIL 8 AM THIS MORNING/...
SLOW MOVING COLD FRONT IS APPROACHING FROM THE WEST AS SCATTERED
SHOWERS BEGIN TO REACH THE WESTERN MOST PORTIONS OF THE CWA.
EXPECT THESE SCATTERED SHRA TO ENCROACH ON JOHNSTOWN AND BRADFORD
BY DAY BREAK.

CHC POPS ARRIVE FOR THE CENTRAL ZONES TOWARD DAYBREAK...WHILE
THE SUSQ VALLEY AND POINTS EAST GO FROM 0 POPS TO ABOUT 20 POPS
TOWARD DAYBREAK.

EXPECT ANY FOG THAT DOES FORM LATER TONIGHT TO REDUCE VSBYS TO
2-3SM.  THE INCREASING CLOUDS MID AND HIGH CLOUDS WEST...AND AREAS
OF LIGHT FOG/STRATUS THROUGHOUT THE CENTRAL AND ERN ZONES WILL
HELP KEEP THE TEMPS MILD AND MUCH ABOVE NORMAL THROUGH THE NIGHT.
LOWS AROUND DAYBREAK TUES WILL BE IN THE LOWER TO MIDDLE 60S.
CLOUDS WILL BE LOW AS STRATOCU SHOULD FORM OUT AHEAD OF THE COLD
FRONT. THIS LAYER SHOULD SLOWLY LIFT BY MID MORNING.

&&

.SHORT TERM /8 AM THIS MORNING THROUGH 6 PM WEDNESDAY/...
THE SPIN AROUND THE UPPER LOW WILL GRADUALLY PUSH A OCCLUDED FRONT
IN FROM THE WEST LATER TONIGHT. SHRA ALONG THE S-N FEATURE WILL BE
FED BY ABOVE NORMAL PWATS BUT THE UPPER LOW WILL BE WRAPPING IN
DRY AIR AROUND ITSELF. THE BEST MOISTURE CONVERGENCE WILL BE
DIRECTLY OVER THE CWA ON TUESDAY AND HIGH POPS ARE ON ORDER. BUT
WITH THE MIXING OF THE DRIER AIR FROM THE UPPER PLAINS AND THE
SHALLOW FEED OF MOISTURE OFF THE ATLANTIC - THE QPF IS
MINIMAL...ON THE ORDER OF 0.25-0.5 INCHES FOR MOST PLACES THROUGH
WED AM. CLOUDS AND RAIN/SHOWERS WILL KEEP TEMPS ON TUESDAY DOWN
FROM THE LAST FEW DAYS...BUT STILL ABOUT 5F ABOVE NORMALS. FORCING
AND CONVERGENCE SLIDES TO THE EAST TUESDAY NIGHT AND WILL TAPER
INITIALLY LIKELY POPS OFF FROM W-E THROUGH THE NIGHT. ANOTHER
ALMOST- MUGGY NIGHT IS IN STORE FOR TUESDAY NIGHT WITH DEWPOINTS
HANGING IN THE 60S SE...BUT FALLING INTO THE M50S IN THE NW.

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/...
OCCLUDED FRONT WILL SLOWLY BE EXITING EAST OF CWA WED MORNING...
TAKING BAND OF HEAVIER PRECIP ALONG WITH IT. BUT UPPER FORCING
RETURNS DURING THE DAY ON WED INTO THU AS UPPER LOW LINGERING TO
OUR WEST FINALLY EDGES EASTWARD...SHARPENS AND BRIEFLY GOES
NEGATIVELY TILTED WHICH WILL ALLOW SHOWERY WEATHER TO
RETURN...AGAIN FOCUSED ON EASTERN HALF OF CWA. TEMPS REMAIN ON
THE MILD SIDE WED/THU WITH READINGS IN THE 60S/70S AND MILD LOWS.

BY FRI...SHARP AND POTENT WAVE DROPS OUT OF UPPER MIDWEST...
CARVING OUT SHARP TROUGH FOR THE WEEKEND...AND POSS BRINGING
FALLING TEMPS FOR FRI AFTERNOON IN THE NW. MAIN DYNAMICS WITH THE
SYSTEM REMAIN TO THE NORTH...LIMITING PRECIP CHANCES MAINLY TO THE
NW. COLDER AND DRIER AIR PUSHES IN STARTING FRI AS 850 MB TEMPS
BEGIN A STEADY FALL...BOTTOMING OUT SUNDAY AT OR JUST BELOW 0F.
WITH NW FLOW ACROSS GLAKES...EXPECT TO SEE ABUNDANT CLOUDS AND
LAKE EFFECT RAIN SHOWERS IMPACT NW MTNS LATER FRI INTO SAT NIGHT.
CENTRAL AND SE SHOULD REMAIN DRY THOUGH WITH DOWNSLOPING FLOW.
TEMPS ON SAT WILL STRUGGLE TO GET OUT OF THE 40S ACROSS THE
NORTH...WITH COOL HIGHS ONLY APPROACHING 60 IN THE SE. LOWS WILL
BE IN THE 30S/40S.

HIGH PRESSURE BUILDING INTO OHIO VALLEY WILL WORK IN FOR EARLY
NEXT WEEK...ALLOWING TEMPS TO RECOVER FAIRLY QUICKLY. THOUGH WITH
DRIER AIRMASS IN PLACE...WILL HAVE TO WATCH FOR POTENTIAL OF
FROST/FREEZE CONDITIONS ACROSS THE NORTH BY MON MORNING.

&&

.AVIATION /06Z TUESDAY THROUGH SATURDAY/...
COOLING OF BLYR...COMBINED WITH MOIST UPSLOPING SERLY FLOW...WILL
YIELD DETERIORATING CONDS IN LOW CLOUDS/FOG EARLY THIS MORNING. THE W
MTNS STILL HAS THE CHC OF EARLY MORNING SHRA/TSRA ASSOCIATED WITH AN
APPROACHING COLD FRONT. 21Z SREF DATA SUPPORTS A HIGH CONFIDENCE
OF WIDESPREAD IFR CONDS BTWN 08Z-15Z. THE ONE EXCEPTION MAY BE
JST. VEERING SFC WINDS TO THE SOUTH RESULTS IN A DOWNSLOPING
FLOW...WHICH IS CLIMATOLOGICALLY UNFAVORABLE FOR LOW CIGS.

TUESDAY LOOKS WET AND CLOUDY WITH NUMEROUS SHRA /AND POSS TSRA/...AS THE
SLOW MOVING COLD FRONT PASSES THROUGH. LOWEST CIGS/VSBYS WILL BE
IN THE MORNING WITH SOME MODEST IMPROVEMENT DURING THE AFTN. LGT
WINDS...PARTIAL CLEARING AND WET GROUND WILL LIKELY RESULT IN
WIDESPREAD FOG/LOW VSBYS REDEVELOPING TUE NIGHT.

OUTLOOK...
WED...LOW CIGS/RAIN POSSIBLE...ESP EAST.
THU...AM FOG POSSIBLE.
FRI-SAT...LOW CIGS/SHRA POSS W MTNS...MAINLY AT NIGHT.

&&

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

&&

SYNOPSIS...DEVOIR/LAMBERT
NEAR TERM...LAMBERT/CERU
SHORT TERM...DANGELO
LONG TERM...LAMBERT/RXR
AVIATION...FITZGERALD/CERU

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
502 AM EDT MON SEP 26 2011

PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-049>053-
056>059-063>066-270915-
WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD-
NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-
JUNIATA-SOMERSET-BEDFORD-FULTON-FRANKLIN-TIOGA-NORTHERN LYCOMING-
SULLIVAN-SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR-
NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND-
ADAMS-YORK-LANCASTER-
502 AM EDT MON SEP 26 2011

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...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
403 AM EDT TUE SEP 27 2011

PAZ024-033-270845-
CAMBRIA PA-SOMERSET PA-
403 AM EDT TUE SEP 27 2011

...A STRONG THUNDERSTORM WILL AFFECT SOMERSET AND SOUTHWESTERN
CAMBRIA COUNTIES...

AT 400 AM EDT...A STRONG THUNDERSTORM WAS NEAR ROCKWOOD...MOVING
NORTHEAST AT 35 MPH.

WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.
VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO
POND ON ROADS AND FILL POOR DRAINAGE AREAS. THE RAIN WILL CAUSE RAPID
RISES ON SMALL STREAMS AND CREEKS. THIS STORM WILL AFFECT SOMERSET...
ACOSTA...BOSWELL...JEROME AND ELIM.

THIS WILL IMPACT THE PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 100
AND 118.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...THE JOHNSTOWN
EXPRESSWAY...ROUTE 22...ROUTE 30...ROUTE 219...ROUTE 422...STATE ROAD
56.

LAT...LON 3991 7934 4010 7925 4012 7921 4012 7919
      4036 7900 4055 7889 4041 7859 3976 7912

FORECASTER: CERU