

832 

WWUS20 KWNS 230148

SEL5

SPC WW 230148

ARZ000-MOZ000-OKZ000-230900-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 335

NWS STORM PREDICTION CENTER NORMAN OK

850 PM CDT SUN MAY 22 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN ARKANSAS

       THE SOUTHERN MISSOURI BOOTHEEL

       EASTERN OKLAHOMA



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 850 PM UNTIL

400 AM CDT.



TORNADOES...HAIL TO 2.5 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 140 STATUTE

MILES EAST AND WEST OF A LINE FROM 50 MILES EAST NORTHEAST OF

FLIPPIN ARKANSAS TO 45 MILES EAST SOUTHEAST OF POTEAU OKLAHOMA.

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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 330. WATCH NUMBER 330 WILL NOT BE IN EFFECT AFTER

850 PM CDT. CONTINUE...WW 323...WW 325...WW 326...WW 327...WW

329...WW 332...WW 333...WW 334...



DISCUSSION...THUNDERSTORM CLUSTERS WITH EMBEDDED SUPERCELLS/BOWS

WILL PERSIST OVERNIGHT WHILE DEVELOPING ESEWD ALONG A RESIDUAL

OUTFLOW BOUNDARY ACROSS NRN AR.  THE 00Z LZK SOUNDING REVEALED A

RELATIVELY MOIST AND STRONGLY SHEARED ENVIRONMENT THAT APPEARS TO BE

REPRESENTATIVE OF NRN AR...THUS A RISK FOR TORNADOES IS EXPECTED TO

PERSIST WITH SUPERCELLS AND BOW/BOUNDARY INTERACTIONS.  DAMAGING

WINDS ARE ALSO LIKELY THE CELL MERGERS AND BOWING SEGMENTS...AS WELL

AS THE RISK FOR LARGE HAIL GIVEN A RESERVOIR OF STRONG INSTABILITY

ACROSS OK/AR IN ADVANCE OF THE STORMS.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 28035.





...THOMPSON



286 

WWUS20 KWNS 230148

SEL5

SPC WW 230148

ARZ000-MOZ000-OKZ000-230900-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 335

NWS STORM PREDICTION CENTER NORMAN OK

850 PM CDT SUN MAY 22 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN ARKANSAS

       THE SOUTHERN MISSOURI BOOTHEEL

       EASTERN OKLAHOMA



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 850 PM UNTIL

400 AM CDT.



TORNADOES...HAIL TO 2.5 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 140 STATUTE

MILES EAST AND WEST OF A LINE FROM 50 MILES EAST NORTHEAST OF

FLIPPIN ARKANSAS TO 45 MILES EAST SOUTHEAST OF POTEAU OKLAHOMA.

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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 330. WATCH NUMBER 330 WILL NOT BE IN EFFECT AFTER

850 PM CDT. CONTINUE...WW 323...WW 325...WW 326...WW 327...WW

329...WW 332...WW 333...WW 334...



DISCUSSION...THUNDERSTORM CLUSTERS WITH EMBEDDED SUPERCELLS/BOWS

WILL PERSIST OVERNIGHT WHILE DEVELOPING ESEWD ALONG A RESIDUAL

OUTFLOW BOUNDARY ACROSS NRN AR.  THE 00Z LZK SOUNDING REVEALED A

RELATIVELY MOIST AND STRONGLY SHEARED ENVIRONMENT THAT APPEARS TO BE

REPRESENTATIVE OF NRN AR...THUS A RISK FOR TORNADOES IS EXPECTED TO

PERSIST WITH SUPERCELLS AND BOW/BOUNDARY INTERACTIONS.  DAMAGING

WINDS ARE ALSO LIKELY THE CELL MERGERS AND BOWING SEGMENTS...AS WELL

AS THE RISK FOR LARGE HAIL GIVEN A RESERVOIR OF STRONG INSTABILITY

ACROSS OK/AR IN ADVANCE OF THE STORMS.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 28035.





...THOMPSON

