SEL9
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 339
   NWS STORM PREDICTION CENTER NORMAN OK
   1000 AM CDT MON MAY 23 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          NORTH-CENTRAL TEXAS
   
   EFFECTIVE THIS MONDAY MORNING AND AFTERNOON FROM 1000 AM UNTIL
   500 PM CDT.
   
   HAIL TO 2.5 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 15 MILES EAST OF
   SHERMAN TEXAS TO 65 MILES WEST SOUTHWEST OF CORSICANA TEXAS.  FOR
   A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU9).
   
   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 337...WW 338...
   
   DISCUSSION...ELEVATED TSTMS HAVE RAPIDLY DEVELOPED W OF THE
   DALLAS-FT. WORTH AREA APPARENTLY IN CONJUNCTION WITH A MIDLEVEL
   IMPULSE TRANSLATING ACROSS THE AREA.  12Z FWD SOUNDING SUGGESTS THAT
   THIS ACTIVITY IS LIKELY ROOTED ABOVE THE CAP WITHIN AN ENVIRONMENT
   CHARACTERIZED BY MUCAPE OF 3000-3500 J/KG AND AROUND 30 KT OF
   EFFECTIVE BULK SHEAR.  THE PRIMARY HAZARD WITH THE STORMS WILL BE
   LARGE HAIL.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM
   MOTION VECTOR 28020.
   
   
   ...MEAD

   SEL9
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 339
   NWS STORM PREDICTION CENTER NORMAN OK
   1000 AM CDT MON MAY 23 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          NORTH-CENTRAL TEXAS
   
   EFFECTIVE THIS MONDAY MORNING AND AFTERNOON FROM 1000 AM UNTIL
   500 PM CDT.
   
   WIDELY SCATTERED DAMAGING WINDS
   ISOLATED WIND GUSTS TO 70 MPH POSSIBLE
   SCATTERED LARGE HAIL
   HAIL TO 2.5 INCHES IN DIAMETER LIKELY
   ISOLATED TORNADOES
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
   STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES EAST OF
   SHERMAN TEXAS TO 65 MILES WEST SOUTHWEST OF CORSICANA TEXAS.  FOR
   A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU9).
   
   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 337...WW 338...
   
   DISCUSSION...ELEVATED TSTMS HAVE RAPIDLY DEVELOPED W OF THE
   DALLAS-FT. WORTH AREA APPARENTLY IN CONJUNCTION WITH A MIDLEVEL
   IMPULSE TRANSLATING ACROSS THE AREA.  12Z FWD SOUNDING SUGGESTS THAT
   THIS ACTIVITY IS LIKELY ROOTED ABOVE THE CAP WITHIN AN ENVIRONMENT
   CHARACTERIZED BY MUCAPE OF 3000-3500 J/KG AND AROUND 30 KT OF
   EFFECTIVE BULK SHEAR.  THE PRIMARY HAZARD WITH THE STORMS WILL BE
   LARGE HAIL.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM
   MOTION VECTOR 28020.
   
   
   ...MEAD

   SEL9
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 339
   NWS STORM PREDICTION CENTER NORMAN OK
   1000 AM CDT MON MAY 23 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          NORTH-CENTRAL TEXAS
   
   EFFECTIVE THIS MONDAY MORNING AND AFTERNOON FROM 1000 AM UNTIL
   500 PM CDT.
   
   HAIL TO 2.5 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 15 MILES EAST OF
   SHERMAN TEXAS TO 65 MILES WEST SOUTHWEST OF CORSICANA TEXAS.  FOR
   A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU9).
   
   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 337...WW 338...
   
   DISCUSSION...ELEVATED TSTMS HAVE RAPIDLY DEVELOPED W OF THE
   DALLAS-FT. WORTH AREA APPARENTLY IN CONJUNCTION WITH A MIDLEVEL
   IMPULSE TRANSLATING ACROSS THE AREA.  12Z FWD SOUNDING SUGGESTS THAT
   THIS ACTIVITY IS LIKELY ROOTED ABOVE THE CAP WITHIN AN ENVIRONMENT
   CHARACTERIZED BY MUCAPE OF 3000-3500 J/KG AND AROUND 30 KT OF
   EFFECTIVE BULK SHEAR.  THE PRIMARY HAZARD WITH THE STORMS WILL BE
   LARGE HAIL.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM
   MOTION VECTOR 28020.
   
   
   ...MEAD

   WOUS64 KWNS 231456
   WOU9
   
   BULLETIN - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 339
   NWS STORM PREDICTION CENTER NORMAN OK
   1000 AM CDT MON MAY 23 2011
   
   SEVERE THUNDERSTORM WATCH 339 IS IN EFFECT UNTIL 500 PM CDT
   FOR THE FOLLOWING LOCATIONS
   
   TXC035-085-093-097-113-119-121-133-139-143-147-181-193-213-217-
   221-223-231-237-251-257-277-333-337-349-363-367-379-397-425-429-
   439-467-497-503-232200-
   /O.NEW.KWNS.SV.A.0339.110523T1500Z-110523T2200Z/
   
   TX 
   .    TEXAS COUNTIES INCLUDED ARE
   
   BOSQUE               COLLIN              COMANCHE            
   COOKE                DALLAS              DELTA               
   DENTON               EASTLAND            ELLIS               
   ERATH                FANNIN              GRAYSON             
   HAMILTON             HENDERSON           HILL                
   HOOD                 HOPKINS             HUNT                
   JACK                 JOHNSON             KAUFMAN             
   LAMAR                MILLS               MONTAGUE            
   NAVARRO              PALO PINTO          PARKER              
   RAINS                ROCKWALL            SOMERVELL           
   STEPHENS             TARRANT             VAN ZANDT           
   WISE                 YOUNG               
   
   
   ATTN...WFO...FWD...
   
   
   

   SAW9 
   WW 339 SEVERE TSTM TX 231500Z - 232200Z
   AXIS..60 STATUTE MILES EAST AND WEST OF LINE..
   15E GYI/SHERMAN TX/ - 65WSW CRS/CORSICANA TX/
   ..AVIATION COORDS.. 50NM E/W /48SE ADM - 8W ACT/
   HAIL SURFACE AND ALOFT..2.5 INCHES. WIND GUSTS..60 KNOTS.
   MAX TOPS TO 600. MEAN STORM MOTION VECTOR 28020.
   
   LAT...LON 33729537 31659640 31659844 33729744
   
   THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
   FOR WOU9.
   

Watch 339 Status Report Messages:

STATUS REPORT #4 ON WW 339

VALID 232025Z - 232140Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NE CRS TO
15 NNW DAL TO 15 W GYI.

..HART..05/23/11

ATTN...WFO...FWD...

&&

STATUS REPORT FOR WS 339 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

TXC085-119-147-181-223-231-257-277-379-397-467-232140-

TX 
.    TEXAS COUNTIES INCLUDED ARE

COLLIN		     DELTA		 FANNIN 	     
GRAYSON 	     HOPKINS		 HUNT		     
KAUFMAN 	     LAMAR		 RAINS		     
ROCKWALL	     VAN ZANDT		 
$$


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 339

VALID 231930Z - 232040Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 ENE CRS
TO 15 NNW DAL TO 15 W GYI.

..HART..05/23/11

ATTN...WFO...FWD...

&&

STATUS REPORT FOR WS 339 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

TXC085-119-147-181-223-231-257-277-379-397-467-232040-

TX 
.    TEXAS COUNTIES INCLUDED ARE

COLLIN		     DELTA		 FANNIN 	     
GRAYSON 	     HOPKINS		 HUNT		     
KAUFMAN 	     LAMAR		 RAINS		     
ROCKWALL	     VAN ZANDT		 
$$


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 339

VALID 231855Z - 231940Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NE CRS TO
15 NNW DAL TO 15 W GYI.

..HART..05/23/11

ATTN...WFO...FWD...

&&

STATUS REPORT FOR WS 339 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

TXC085-119-147-181-213-223-231-257-277-379-397-467-231940-

TX 
.    TEXAS COUNTIES INCLUDED ARE

COLLIN		     DELTA		 FANNIN 	     
GRAYSON 	     HENDERSON		 HOPKINS	     
HUNT		     KAUFMAN		 LAMAR		     
RAINS		     ROCKWALL		 VAN ZANDT	     
$$


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 339

VALID 231740Z - 231840Z

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

..HART..05/23/11

ATTN...WFO...FWD...

&&

STATUS REPORT FOR WS 339 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

TXC035-085-093-097-113-119-121-133-139-143-147-181-193-213-217-
221-223-231-237-251-257-277-333-337-349-363-367-379-397-425-429-
439-467-497-503-231840-

TX 
.    TEXAS COUNTIES INCLUDED ARE

BOSQUE		     COLLIN		 COMANCHE	     
COOKE		     DALLAS		 DELTA		     
DENTON		     EASTLAND		 ELLIS		     
ERATH		     FANNIN		 GRAYSON	     
HAMILTON	     HENDERSON		 HILL		     
HOOD		     HOPKINS		 HUNT		     
JACK		     JOHNSON		 KAUFMAN	     
LAMAR		     MILLS		 MONTAGUE	     
NAVARRO 	     PALO PINTO 	 PARKER 	     
RAINS		     ROCKWALL		 SOMERVELL	     
STEPHENS	     TARRANT		 VAN ZANDT	     
WISE		     YOUNG		 
$$


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.