SEL0
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 320
   NWS STORM PREDICTION CENTER NORMAN OK
   710 PM CDT SAT MAY 21 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          PARTS OF SOUTH CENTRAL AND SOUTHEAST OKLAHOMA
   
   EFFECTIVE THIS SATURDAY NIGHT FROM 710 PM UNTIL MIDNIGHT CDT.
   
   TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
   GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
   AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE
   MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH NORTHWEST OF
   MCALESTER OKLAHOMA TO 15 MILES SOUTHWEST OF DURANT OKLAHOMA.  FOR
   A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU0).
   
   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 316...WW 317...WW
   318...WW 319...
   
   DISCUSSION...AN ISOLATED STORM FORMED EARLIER ON THE DRYLINE IN S
   CENTRAL OK...WHILE VISIBLE IMAGERY NOW SHOWS MORE DEEPENING
   CONVECTION FARTHER TO THE N.  EVEN THOUGH THE BOUNDARY LAYER HAS
   REMAINED RELATIVELY COOL FARTHER TO THE E ACROSS SE OK TODAY...THE
   COMBINATION OF STEEP MIDLEVEL LAPSE RATES AND DEWPOINTS NEAR 70 F
   WILL MAINTAIN MLCAPE AOA 2500 J/KG FOR THE NEXT SEVERAL HOURS. 
   SINCE IT APPEARS THAT ONE OR TWO STORMS WILL BECOME SUSTAINED...THE
   ENVIRONMENT IS SUPPORTIVE OF SUPERCELLS WITH VERY LARGE HAIL AND A
   COUPLE OF TORNADOES.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   550. MEAN STORM MOTION VECTOR 27025.
   
   
   ...THOMPSON

   SEL0
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 320
   NWS STORM PREDICTION CENTER NORMAN OK
   710 PM CDT SAT MAY 21 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          PARTS OF SOUTH CENTRAL AND SOUTHEAST OKLAHOMA
   
   EFFECTIVE THIS SATURDAY NIGHT FROM 710 PM UNTIL MIDNIGHT CDT.
   
   SEVERAL TORNADOES
   SCATTERED LARGE HAIL
   ISOLATED HAIL TO 3.0 INCHES IN DIAMETER POSSIBLE
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE
   MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH NORTHWEST OF
   MCALESTER OKLAHOMA TO 15 MILES SOUTHWEST OF DURANT OKLAHOMA.  FOR
   A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU0).
   
   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 316...WW 317...WW
   318...WW 319...
   
   DISCUSSION...AN ISOLATED STORM FORMED EARLIER ON THE DRYLINE IN S
   CENTRAL OK...WHILE VISIBLE IMAGERY NOW SHOWS MORE DEEPENING
   CONVECTION FARTHER TO THE N.  EVEN THOUGH THE BOUNDARY LAYER HAS
   REMAINED RELATIVELY COOL FARTHER TO THE E ACROSS SE OK TODAY...THE
   COMBINATION OF STEEP MIDLEVEL LAPSE RATES AND DEWPOINTS NEAR 70 F
   WILL MAINTAIN MLCAPE AOA 2500 J/KG FOR THE NEXT SEVERAL HOURS. 
   SINCE IT APPEARS THAT ONE OR TWO STORMS WILL BECOME SUSTAINED...THE
   ENVIRONMENT IS SUPPORTIVE OF SUPERCELLS WITH VERY LARGE HAIL AND A
   COUPLE OF TORNADOES.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   550. MEAN STORM MOTION VECTOR 27025.
   
   
   ...THOMPSON

   SEL0
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 320
   NWS STORM PREDICTION CENTER NORMAN OK
   710 PM CDT SAT MAY 21 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          PARTS OF SOUTH CENTRAL AND SOUTHEAST OKLAHOMA
   
   EFFECTIVE THIS SATURDAY NIGHT FROM 710 PM UNTIL MIDNIGHT CDT.
   
   TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
   GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
   AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE
   MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH NORTHWEST OF
   MCALESTER OKLAHOMA TO 15 MILES SOUTHWEST OF DURANT OKLAHOMA.  FOR
   A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU0).
   
   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 316...WW 317...WW
   318...WW 319...
   
   DISCUSSION...AN ISOLATED STORM FORMED EARLIER ON THE DRYLINE IN S
   CENTRAL OK...WHILE VISIBLE IMAGERY NOW SHOWS MORE DEEPENING
   CONVECTION FARTHER TO THE N.  EVEN THOUGH THE BOUNDARY LAYER HAS
   REMAINED RELATIVELY COOL FARTHER TO THE E ACROSS SE OK TODAY...THE
   COMBINATION OF STEEP MIDLEVEL LAPSE RATES AND DEWPOINTS NEAR 70 F
   WILL MAINTAIN MLCAPE AOA 2500 J/KG FOR THE NEXT SEVERAL HOURS. 
   SINCE IT APPEARS THAT ONE OR TWO STORMS WILL BECOME SUSTAINED...THE
   ENVIRONMENT IS SUPPORTIVE OF SUPERCELLS WITH VERY LARGE HAIL AND A
   COUPLE OF TORNADOES.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   550. MEAN STORM MOTION VECTOR 27025.
   
   
   ...THOMPSON

   WOUS64 KWNS 220005
   WOU0
   
   BULLETIN - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH OUTLINE UPDATE FOR WT 320
   NWS STORM PREDICTION CENTER NORMAN OK
   710 PM CDT SAT MAY 21 2011
   
   TORNADO WATCH 320 IS IN EFFECT UNTIL 1200 AM CDT FOR THE
    FOLLOWING LOCATIONS
   
   OKC005-013-019-023-029-049-063-069-085-091-095-099-107-111-121-
   123-125-127-133-220500-
   /O.NEW.KWNS.TO.A.0320.110522T0010Z-110522T0500Z/
   
   OK 
   .    OKLAHOMA COUNTIES INCLUDED ARE
   
   ATOKA                BRYAN               CARTER              
   CHOCTAW              COAL                GARVIN              
   HUGHES               JOHNSTON            LOVE                
   MARSHALL             MCINTOSH            MURRAY              
   OKFUSKEE             OKMULGEE            PITTSBURG           
   PONTOTOC             POTTAWATOMIE        PUSHMATAHA          
   SEMINOLE             
   
   
   ATTN...WFO...OUN...TSA...
   
   
   

   SAW0 
   WW 320 TORNADO OK 220010Z - 220500Z
   AXIS..55 STATUTE MILES EAST AND WEST OF LINE..
   45NNW MLC/MCALESTER OK/ - 15SW DUA/DURANT OK/
   ..AVIATION COORDS.. 50NM E/W /41NNW MLC - 38SE ADM/
   HAIL SURFACE AND ALOFT..3 INCHES. WIND GUSTS..60 KNOTS.
   MAX TOPS TO 550. MEAN STORM MOTION VECTOR 27025.
   
   LAT...LON 35479511 33799562 33799754 35479705
   
   THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
   FOR WOU0.
   

Watch 320 Status Report Messages:

STATUS REPORT #1 ON WW 320

VALID 220135Z - 220240Z

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

..GOSS..05/22/11

ATTN...WFO...OUN...TSA...

&&

STATUS REPORT FOR WT 320 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

OKC005-013-019-023-029-049-063-069-085-091-095-099-107-111-121-
123-125-127-133-220240-

OK 
.    OKLAHOMA COUNTIES INCLUDED ARE

ATOKA		     BRYAN		 CARTER 	     
CHOCTAW 	     COAL		 GARVIN 	     
HUGHES		     JOHNSTON		 LOVE		     
MCINTOSH	     MARSHALL		 MURRAY 	     
OKFUSKEE	     OKMULGEE		 PITTSBURG	     
PONTOTOC	     POTTAWATOMIE	 PUSHMATAHA	     
SEMINOLE	     
$$


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.