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Central PA Thread - Summer 2012


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gravity waves are one of those phenomenons that are really cool to see show up on satellite... look interesting and good to see when looking for severe weather :-)

Gravity waves have also been identified as focus areas for initiation, sometimes rapid during severe weather outbreaks, of squall lines (Uccelini, 1975).

Reference:

Uccelini, Louis W., 1975: A Case Study of Apparent Gravity Wave Initiation of Severe Convective Storms. Mon. Wea. Rev., 103, 497–513.

doi: http://dx.doi.org/10.1175/1520-0493(1975)103<0497:ACSOAG>2.0.CO;2

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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 524

NWS STORM PREDICTION CENTER NORMAN OK

120 PM EDT THU JUL 26 2012

THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

EASTERN INDIANA

NORTHEAST KENTUCKY

WESTERN MARYLAND

SOUTHWEST NEW YORK

OHIO

WESTERN AND CENTRAL PENNSYLVANIA

NORTHERN AND CENTRAL WEST VIRGINIA

LAKE ERIE

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 120 PM UNTIL

1000 PM EDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 105

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES WEST OF

DAYTON OHIO TO 20 MILES EAST OF WILLIAMSPORT PENNSYLVANIA. FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU4).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.

DISCUSSION...SEVERAL CLUSTERS OF INTENSE AND FAST-MOVING

THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON ACROSS MUCH OF

THE UPPER OH VALLEY...SPREADING EASTWARD INTO PARTS OF NY/PA. HIGH

CAPE VALUES COUPLED WITH FAST FLOW ALOFT WILL PROMOTE THE RISK OF

RATHER WIDESPREAD POTENTIAL FOR DAMAGING WINDS AND SOME HAIL. AN

ISOLATED TORNADO OR TWO IS ALSO POSSIBLE ALONG A RETREATING WARM

FRONT OVER PARTS OF PA/NY LATER THIS AFTERNOON.

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TORNADO WARNING

OHC007-155-PAC039-261745-

/O.NEW.KCLE.TO.W.0008.120726T1721Z-120726T1745Z/

BULLETIN - EAS ACTIVATION REQUESTED

TORNADO WARNING

NATIONAL WEATHER SERVICE CLEVELAND OH

121 PM EDT THU JUL 26 2012

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* TORNADO WARNING FOR...

SOUTHEASTERN ASHTABULA COUNTY IN NORTHEAST OHIO...

NORTHEASTERN TRUMBULL COUNTY IN NORTHEAST OHIO...

SOUTHERN CRAWFORD COUNTY IN NORTHWEST PENNSYLVANIA...

* UNTIL 145 PM EDT

* AT 118 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A

SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS

STORM WAS LOCATED 6 MILES NORTHWEST OF KINSMAN...OR 16 MILES SOUTH

OF JEFFERSON...AND MOVING EAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...

MEADVILLE...KINSMAN...ANDOVER...HARTSTOWN...GENEVA...CONNEAUT LAKE

AND COCHRANTON.

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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 525

NWS STORM PREDICTION CENTER NORMAN OK

210 PM EDT THU JUL 26 2012

THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF

WESTERN CONNECTICUT

WESTERN MASSACHUSETTS

CENTRAL AND EASTERN NEW YORK

NORTHEAST PENNSYLVANIA

SOUTHERN VERMONT

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 210 PM UNTIL

900 PM EDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 15 MILES SOUTH SOUTHWEST OF

ELMIRA NEW YORK TO 20 MILES NORTHEAST OF PITTSFIELD

MASSACHUSETTS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS.

OTHER WATCH INFORMATION...CONTINUE...WW 524...

DISCUSSION...INTENSE THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS

THE WATCH AREA THIS AFTERNOON. ONE CLUSTER OF ONGOING STORMS OVER

WESTERN NY/PA WILL MOVE RAPIDLY EASTWARD WITH A THREAT OF DAMAGING

WINDS AND HAIL. OTHER MORE DISCRETE STORMS MAY FORM ON/NORTH OF

RETREATING WARM FRONT. THESE STORMS WILL POTENTIALLY BECOME

SUPERCELLULAR WITH A RISK OF LARGE HAIL...DAMAGING WINDS...AND

ISOLATED TORNADOES.

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TORNADO WARNING

PAC031-053-065-121-261915-

/O.NEW.KPBZ.TO.W.0007.120726T1823Z-120726T1915Z/

BULLETIN - EAS ACTIVATION REQUESTED

TORNADO WARNING

NATIONAL WEATHER SERVICE PITTSBURGH PA

223 PM EDT THU JUL 26 2012

THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A

* TORNADO WARNING FOR...

NORTHERN CLARION COUNTY IN WEST CENTRAL PENNSYLVANIA...

SOUTHERN FOREST COUNTY IN NORTHWEST PENNSYLVANIA...

NORTHERN JEFFERSON COUNTY IN WEST CENTRAL PENNSYLVANIA...

SOUTHERN VENANGO COUNTY IN NORTHWEST PENNSYLVANIA...

* UNTIL 315 PM EDT

* AT 221 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A

SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR

KENNERDELL...MOVING EAST AT 45 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO

KENNERDELL... FRANKLIN... CLINTONVILLE...

EMLENTON... SENECA... VAN...

KNOX... FRYBURG... CLARION...

LIMESTONE... COOK FOREST STATE PARK...

SUMMERVILLE...

THIS WILL IMPACT THE FOLLOWING HIGHWAY...

I-80 BETWEEN MILE MARKERS 32 AND 90.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING

DESTRUCTIVE STRAIGHT LINE WINDS.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A

WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS

AVAILABLE...SEEK SHELTER IN AN INTERIOR HALLWAY OR ROOM ON THE LOWEST

FLOOR. USE BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY

AWAY FROM WINDOWS.

IF IN A MOBILE HOME OR VEHICLE...EVACUATE IT AND GET INSIDE A STURDY

SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH

OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT

THURSDAY EVENING FOR WESTERN MARYLAND AND EAST CENTRAL OHIO AND

WESTERN PENNSYLVANIA AND NORTHERN WEST VIRGINIA.

PLEASE REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE BY

CALLING TOLL FREE. 1-877-633-6772.

&&

LAT...LON 4108 7890 4115 7968 4117 7970 4117 7992

4140 7990 4145 7906 4142 7906 4141 7909

4136 7909 4135 7905 4138 7897 4143 7896

4145 7898 4146 7895 4138 7897 4134 7888

TIME...MOT...LOC 1823Z 268DEG 40KT 4131 7978

$$

FRIES

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