SEL4
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 424
   NWS STORM PREDICTION CENTER NORMAN OK
   520 PM CDT TUE JUN 19 2007
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          THE OKLAHOMA PANHANDLE
          THE TEXAS PANHANDLE
   
   EFFECTIVE THIS TUESDAY AFTERNOON AND WEDNESDAY MORNING FROM 520
   PM UNTIL 200 AM CDT.
   
   HAIL TO 2 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 85
   STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH OF
   GUYMON OKLAHOMA TO 35 MILES SOUTH SOUTHEAST OF AMARILLO TEXAS. 
   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.
   
   OTHER WATCH INFORMATION...CONTINUE...WW 418...WW 419...WW
   420...WW 421...WW 422...WW 423...
   
   DISCUSSION...SCATTERED THUNDERSTORMS WILL LIKELY DEVELOP ACROSS THE
   WRN TX PANHANDLE AND ALONG A DIFFUSE BOUNDARY IN THE OK PANHANDLE
   THROUGH THIS EVENING.  VERTICAL SHEAR IS MARGINAL FOR SUPERCELLS IN
   THE NRN PORTION OF THE WATCH...AND WEAKER TO THE SOUTH. 
   HOWEVER...EXTREME INSTABILITY WILL SUPPORT STRONG UPDRAFTS AND AN
   ATTENDANT THREAT FOR LARGE HAIL...AS WELL AS STRONG DOWNBURST
   POTENTIAL.  THE THREAT FOR DAMAGING WINDS MAY INCREASE LATER THIS
   EVENING AS DEVELOPING STORMS MERGE INTO LARGER CLUSTERS...OR AS
   ONGOING STORMS IN WRN KS SPREAD SWD INTO THE OK AND NRN TX
   PANHANDLES IN ASSOCIATION WITH A STRENGTHENING COLD POOL.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM
   MOTION VECTOR 36015.
   
   
   ...THOMPSON

   SEL4
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 424
   NWS STORM PREDICTION CENTER NORMAN OK
   520 PM CDT TUE JUN 19 2007
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          THE OKLAHOMA PANHANDLE
          THE TEXAS PANHANDLE
   
   EFFECTIVE THIS TUESDAY AFTERNOON AND WEDNESDAY MORNING FROM 520
   PM UNTIL 200 AM CDT.
   
   HAIL TO 2 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 85
   STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH OF
   GUYMON OKLAHOMA TO 35 MILES SOUTH SOUTHEAST OF AMARILLO TEXAS. 
   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.
   
   OTHER WATCH INFORMATION...CONTINUE...WW 418...WW 419...WW
   420...WW 421...WW 422...WW 423...
   
   DISCUSSION...SCATTERED THUNDERSTORMS WILL LIKELY DEVELOP ACROSS THE
   WRN TX PANHANDLE AND ALONG A DIFFUSE BOUNDARY IN THE OK PANHANDLE
   THROUGH THIS EVENING.  VERTICAL SHEAR IS MARGINAL FOR SUPERCELLS IN
   THE NRN PORTION OF THE WATCH...AND WEAKER TO THE SOUTH. 
   HOWEVER...EXTREME INSTABILITY WILL SUPPORT STRONG UPDRAFTS AND AN
   ATTENDANT THREAT FOR LARGE HAIL...AS WELL AS STRONG DOWNBURST
   POTENTIAL.  THE THREAT FOR DAMAGING WINDS MAY INCREASE LATER THIS
   EVENING AS DEVELOPING STORMS MERGE INTO LARGER CLUSTERS...OR AS
   ONGOING STORMS IN WRN KS SPREAD SWD INTO THE OK AND NRN TX
   PANHANDLES IN ASSOCIATION WITH A STRENGTHENING COLD POOL.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM
   MOTION VECTOR 36015.
   
   
   ...THOMPSON

   WOUS64 KWNS 192218
   WOU4
   
   BULLETIN - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 424
   NWS STORM PREDICTION CENTER NORMAN OK
   520 PM CDT TUE JUN 19 2007
   
   SEVERE THUNDERSTORM WATCH 424 IS IN EFFECT UNTIL 200 AM CDT
   FOR THE FOLLOWING LOCATIONS
   
   OKC007-025-139-200700-
   /O.NEW.KWNS.SV.A.0424.070619T2220Z-070620T0700Z/
   
   OK 
   .    OKLAHOMA COUNTIES INCLUDED ARE
   
   BEAVER               CIMARRON            TEXAS               
   
   
   TXC011-065-087-111-117-129-179-195-205-211-233-295-341-357-359-
   375-381-393-421-483-200700-
   /O.NEW.KWNS.SV.A.0424.070619T2220Z-070620T0700Z/
   
   TX 
   .    TEXAS COUNTIES INCLUDED ARE
   
   ARMSTRONG            CARSON              COLLINGSWORTH       
   DALLAM               DEAF SMITH          DONLEY              
   GRAY                 HANSFORD            HARTLEY             
   HEMPHILL             HUTCHINSON          LIPSCOMB            
   MOORE                OCHILTREE           OLDHAM              
   POTTER               RANDALL             ROBERTS             
   SHERMAN              WHEELER             
   
   
   ATTN...WFO...AMA...
   
   
   

   SAW4 
   WW 424 SEVERE TSTM OK TX 192220Z - 200700Z
   AXIS..85 STATUTE MILES EAST AND WEST OF LINE..
   20N GUY/GUYMON OK/ - 35SSE AMA/AMARILLO TX/
   ..AVIATION COORDS.. 75NM E/W /26W LBL - 33SSE AMA/
   HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
   MAX TOPS TO 600. MEAN STORM MOTION VECTOR 36015.
   
   LAT...LON 36959995 34749998 34740298 36950304
   
   THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
   FOR WOU4.
   

Watch 424 Status Report Messages:

STATUS REPORT #5 ON WW 424

VALID 200640Z - 200700Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 50 WNW CDS
TO 35 E AMA TO 45 WSW CSM.

WW 424 MAY BE ALLOWED TO EXPIRE AT 20/07Z.

..KERR..06/20/07

ATTN...WFO...AMA...

&&

STATUS REPORT FOR WS 424 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

TXC087-129-200700-

TX 
.    TEXAS COUNTIES INCLUDED ARE

COLLINGSWORTH	     DONLEY		 
$$


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 #4 ON WW 424

VALID 200440Z - 200540Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 SE AMA TO
35 E AMA TO 10 ENE DHT TO 20 W EHA TO 10 WSW LBL TO 15 WSW GAG.

..DIAL..06/20/07

ATTN...WFO...AMA...

&&

STATUS REPORT FOR WS 424 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

OKC025-139-200540-

OK 
.    OKLAHOMA COUNTIES INCLUDED ARE

CIMARRON	     TEXAS		 
$$


TXC065-087-129-179-195-211-233-295-341-357-393-421-483-200540-

TX 
.    TEXAS COUNTIES INCLUDED ARE

CARSON		     COLLINGSWORTH	 DONLEY 	     
GRAY		     HANSFORD		 HEMPHILL	     
HUTCHINSON	     LIPSCOMB		 MOORE		     
OCHILTREE	     ROBERTS		 SHERMAN	     
WHEELER 	     
$$


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 424

VALID 200340Z - 200440Z

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

..DIAL..06/20/07

ATTN...WFO...AMA...

&&

STATUS REPORT FOR WS 424 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

OKC007-025-139-200440-

OK 
.    OKLAHOMA COUNTIES INCLUDED ARE

BEAVER		     CIMARRON		 TEXAS		     
$$


TXC011-065-087-111-117-129-179-195-205-211-233-295-341-357-359-
375-381-393-421-483-200440-

TX 
.    TEXAS COUNTIES INCLUDED ARE

ARMSTRONG	     CARSON		 COLLINGSWORTH	     
DALLAM		     DEAF SMITH 	 DONLEY 	     
GRAY		     HANSFORD		 HARTLEY	     
HEMPHILL	     HUTCHINSON 	 LIPSCOMB	     
MOORE		     OCHILTREE		 OLDHAM 	     
POTTER		     RANDALL		 ROBERTS	     
SHERMAN 	     WHEELER		 
$$


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 424

VALID 200045Z - 200140Z

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1206.

..GRAMS..06/20/07

ATTN...WFO...AMA...

&&

STATUS REPORT FOR WS 424 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

OKC007-025-139-200140-

OK 
.    OKLAHOMA COUNTIES INCLUDED ARE

BEAVER		     CIMARRON		 TEXAS		     
$$


TXC011-065-087-111-117-129-179-195-205-211-233-295-341-357-359-
375-381-393-421-483-200140-

TX 
.    TEXAS COUNTIES INCLUDED ARE

ARMSTRONG	     CARSON		 COLLINGSWORTH	     
DALLAM		     DEAF SMITH 	 DONLEY 	     
GRAY		     HANSFORD		 HARTLEY	     
HEMPHILL	     HUTCHINSON 	 LIPSCOMB	     
MOORE		     OCHILTREE		 OLDHAM 	     
POTTER		     RANDALL		 ROBERTS	     
SHERMAN 	     WHEELER		 
$$


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 424

VALID 192340Z - 200040Z

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

..GRAMS..06/19/07

ATTN...WFO...AMA...

&&

STATUS REPORT FOR WS 424 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

OKC007-025-139-200040-

OK 
.    OKLAHOMA COUNTIES INCLUDED ARE

BEAVER		     CIMARRON		 TEXAS		     
$$


TXC011-065-087-111-117-129-179-195-205-211-233-295-341-357-359-
375-381-393-421-483-200040-

TX 
.    TEXAS COUNTIES INCLUDED ARE

ARMSTRONG	     CARSON		 COLLINGSWORTH	     
DALLAM		     DEAF SMITH 	 DONLEY 	     
GRAY		     HANSFORD		 HARTLEY	     
HEMPHILL	     HUTCHINSON 	 LIPSCOMB	     
MOORE		     OCHILTREE		 OLDHAM 	     
POTTER		     RANDALL		 ROBERTS	     
SHERMAN 	     WHEELER		 
$$


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.