SEL6
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 246
   NWS STORM PREDICTION CENTER NORMAN OK
   1145 PM EDT WED APR 27 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          CENTRAL PENNSYLVANIA
   
   EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 1145 PM
   UNTIL 700 AM EDT.
   
   HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
   STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH
   NORTHWEST OF WILLIAMSPORT PENNSYLVANIA TO 10 MILES SOUTH
   SOUTHEAST OF HAGERSTOWN MARYLAND.  FOR A COMPLETE DEPICTION OF
   THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS
   WOU6).
   
   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.
   
   OTHER WATCH INFORMATION...CONTINUE...WW 238...WW 239...WW
   240...WW 241...WW 242...WW 244...WW 245...
   
   DISCUSSION...TSTMS HAVE RECENTLY INCREASED IN COVERAGE AND INTENSITY
   OVER CNTRL PA ALONG WRN EDGE OF MORE MOIST BOUNDARY LAYER
   CHARACTERIZED BY DEWPOINTS IN THE MID/UPPER 60S AND MLCAPE VALUES OF
   500-1000 J/KG.  CURRENT STATE COLLEGE VWP IS SHOWING RATHER STRONG
   LOW AND DEEP-LAYER SHEAR...SUPPORTIVE OF SUPERCELLS AND BOWING
   STRUCTURES CAPABLE OF DAMAGING WINDS AND HAIL.  A BRIEF TORNADO
   REMAINS POSSIBLE...THOUGH THE GRADUALLY COOLING AIR MASS AND
   RESULTANT CIN ACCUMULATION WILL PROHIBIT A MORE ROBUST THREAT.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 22040.
   
   
   ...MEAD

   SEL6
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 246
   NWS STORM PREDICTION CENTER NORMAN OK
   1145 PM EDT WED APR 27 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          CENTRAL PENNSYLVANIA
   
   EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 1145 PM
   UNTIL 700 AM EDT.
   
   WIDELY SCATTERED DAMAGING WINDS
   ISOLATED WIND GUSTS TO 70 MPH POSSIBLE
   WIDELY SCATTERED LARGE HAIL TO 1.5 INCHES IN DIAMETER
   ISOLATED TORNADOES
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
   STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH
   NORTHWEST OF WILLIAMSPORT PENNSYLVANIA TO 10 MILES SOUTH
   SOUTHEAST OF HAGERSTOWN MARYLAND.  FOR A COMPLETE DEPICTION OF
   THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS
   WOU6).
   
   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.
   
   OTHER WATCH INFORMATION...CONTINUE...WW 238...WW 239...WW
   240...WW 241...WW 242...WW 244...WW 245...
   
   DISCUSSION...TSTMS HAVE RECENTLY INCREASED IN COVERAGE AND INTENSITY
   OVER CNTRL PA ALONG WRN EDGE OF MORE MOIST BOUNDARY LAYER
   CHARACTERIZED BY DEWPOINTS IN THE MID/UPPER 60S AND MLCAPE VALUES OF
   500-1000 J/KG.  CURRENT STATE COLLEGE VWP IS SHOWING RATHER STRONG
   LOW AND DEEP-LAYER SHEAR...SUPPORTIVE OF SUPERCELLS AND BOWING
   STRUCTURES CAPABLE OF DAMAGING WINDS AND HAIL.  A BRIEF TORNADO
   REMAINS POSSIBLE...THOUGH THE GRADUALLY COOLING AIR MASS AND
   RESULTANT CIN ACCUMULATION WILL PROHIBIT A MORE ROBUST THREAT.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 22040.
   
   
   ...MEAD

   SEL6
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 246
   NWS STORM PREDICTION CENTER NORMAN OK
   1145 PM EDT WED APR 27 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          CENTRAL PENNSYLVANIA
   
   EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 1145 PM
   UNTIL 700 AM EDT.
   
   HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
   STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH
   NORTHWEST OF WILLIAMSPORT PENNSYLVANIA TO 10 MILES SOUTH
   SOUTHEAST OF HAGERSTOWN MARYLAND.  FOR A COMPLETE DEPICTION OF
   THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS
   WOU6).
   
   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.
   
   OTHER WATCH INFORMATION...CONTINUE...WW 238...WW 239...WW
   240...WW 241...WW 242...WW 244...WW 245...
   
   DISCUSSION...TSTMS HAVE RECENTLY INCREASED IN COVERAGE AND INTENSITY
   OVER CNTRL PA ALONG WRN EDGE OF MORE MOIST BOUNDARY LAYER
   CHARACTERIZED BY DEWPOINTS IN THE MID/UPPER 60S AND MLCAPE VALUES OF
   500-1000 J/KG.  CURRENT STATE COLLEGE VWP IS SHOWING RATHER STRONG
   LOW AND DEEP-LAYER SHEAR...SUPPORTIVE OF SUPERCELLS AND BOWING
   STRUCTURES CAPABLE OF DAMAGING WINDS AND HAIL.  A BRIEF TORNADO
   REMAINS POSSIBLE...THOUGH THE GRADUALLY COOLING AIR MASS AND
   RESULTANT CIN ACCUMULATION WILL PROHIBIT A MORE ROBUST THREAT.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 22040.
   
   
   ...MEAD

   WOUS64 KWNS 280340
   WOU6
   
   BULLETIN - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 246
   NWS STORM PREDICTION CENTER NORMAN OK
   1145 PM EDT WED APR 27 2011
   
   SEVERE THUNDERSTORM WATCH 246 IS IN EFFECT UNTIL 700 AM EDT
   FOR THE FOLLOWING LOCATIONS
   
   PAC001-009-013-021-023-027-033-035-037-041-043-047-055-057-061-
   067-071-075-081-083-087-093-097-099-105-107-109-111-113-117-119-
   133-281100-
   /O.NEW.KWNS.SV.A.0246.110428T0345Z-110428T1100Z/
   
   PA 
   .    PENNSYLVANIA COUNTIES INCLUDED ARE
   
   ADAMS                BEDFORD             BLAIR               
   CAMBRIA              CAMERON             CENTRE              
   CLEARFIELD           CLINTON             COLUMBIA            
   CUMBERLAND           DAUPHIN             ELK                 
   FRANKLIN             FULTON              HUNTINGDON          
   JUNIATA              LANCASTER           LEBANON             
   LYCOMING             MCKEAN              MIFFLIN             
   MONTOUR              NORTHUMBERLAND      PERRY               
   POTTER               SCHUYLKILL          SNYDER              
   SOMERSET             SULLIVAN            TIOGA               
   UNION                YORK                
   
   
   ATTN...WFO...CTP...
   
   
   

   SAW6 
   WW 246 SEVERE TSTM PA 280345Z - 281100Z
   AXIS..60 STATUTE MILES EAST AND WEST OF LINE..
   55NNW IPT/WILLIAMSPORT PA/ - 10SSE HGR/HAGERSTOWN MD/
   ..AVIATION COORDS.. 50NM E/W /40NE SLT - 31W EMI/
   HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
   MAX TOPS TO 500. MEAN STORM MOTION VECTOR 22040.
   
   LAT...LON 41977616 39567651 39567876 41977850
   
   THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
   FOR WOU6.
   

Watch 246 Status Report Messages:

STATUS REPORT #4 ON WW 246

VALID 281045Z - 281140Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 SSW CXY
TO 30 S IPT TO 30 W AVP.

..DIAL..04/28/11

ATTN...WFO...CTP...

&&

STATUS REPORT FOR WS 246 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

PAC037-043-071-075-107-133-281140-

PA 
.    PENNSYLVANIA COUNTIES INCLUDED ARE

COLUMBIA	     DAUPHIN		 LANCASTER	     
LEBANON 	     SCHUYLKILL 	 YORK		     
$$


THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY.  PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$

STATUS REPORT #3 ON WW 246

VALID 280740Z - 280840Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 N MRB TO
20 SW ELM.

FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 656

..GRAMS..04/28/11

ATTN...WFO...CTP...

&&

STATUS REPORT FOR WS 246 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

PAC001-035-037-041-043-055-067-071-075-081-093-097-099-107-109-
113-117-119-133-280840-

PA 
.    PENNSYLVANIA COUNTIES INCLUDED ARE

ADAMS		     CLINTON		 COLUMBIA	     
CUMBERLAND	     DAUPHIN		 FRANKLIN	     
JUNIATA 	     LANCASTER		 LEBANON	     
LYCOMING	     MONTOUR		 NORTHUMBERLAND      
PERRY		     SCHUYLKILL 	 SNYDER 	     
SULLIVAN	     TIOGA		 UNION		     
YORK		     
$$


THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY.  PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$

STATUS REPORT #2 ON WW 246

VALID 280630Z - 280740Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 W AOO TO
25 WSW ELM.

FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 652

..GRAMS..04/28/11

ATTN...WFO...CTP...

&&

STATUS REPORT FOR WS 246 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

PAC001-009-013-027-035-037-041-043-055-057-061-067-071-075-081-
087-093-097-099-107-109-113-117-119-133-280740-

PA 
.    PENNSYLVANIA COUNTIES INCLUDED ARE

ADAMS		     BEDFORD		 BLAIR		     
CENTRE		     CLINTON		 COLUMBIA	     
CUMBERLAND	     DAUPHIN		 FRANKLIN	     
FULTON		     HUNTINGDON 	 JUNIATA	     
LANCASTER	     LEBANON		 LYCOMING	     
MIFFLIN 	     MONTOUR		 NORTHUMBERLAND      
PERRY		     SCHUYLKILL 	 SNYDER 	     
SULLIVAN	     TIOGA		 UNION		     
YORK		     
$$


THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY.  PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$

STATUS REPORT #1 ON WW 246

VALID 280530Z - 280640Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 WNW AOO
TO 30 WSW ELM.

..GRAMS..04/28/11

ATTN...WFO...CTP...

&&

STATUS REPORT FOR WS 246 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

PAC001-009-013-027-035-037-041-043-055-057-061-067-071-075-081-
087-093-097-099-107-109-113-117-119-133-280640-

PA 
.    PENNSYLVANIA COUNTIES INCLUDED ARE

ADAMS		     BEDFORD		 BLAIR		     
CENTRE		     CLINTON		 COLUMBIA	     
CUMBERLAND	     DAUPHIN		 FRANKLIN	     
FULTON		     HUNTINGDON 	 JUNIATA	     
LANCASTER	     LEBANON		 LYCOMING	     
MIFFLIN 	     MONTOUR		 NORTHUMBERLAND      
PERRY		     SCHUYLKILL 	 SNYDER 	     
SULLIVAN	     TIOGA		 UNION		     
YORK		     
$$


THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY.  PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$

Please visit the National Weather Service Interactive Weather Information Network (IWIN) for more information on the warnings.

For each watch, probabilities for particular events inside the watch (listed above in each table) are determined by the issuing forecaster. The "Low" category contains probability values ranging from less than 2% to 20% (F2-F5 tornadoes), less than 5% to 20% (all other probabilities), "Moderate" from 30% to 60%, and "High" from 70% to greater than 95%. High values are bolded and lighter in color to provide awareness of an increased threat for a particular event.