

722 

WWUS20 KWNS 101742 CCB

SEL0

SPC WW 101742 CCB

ARZ000-LAZ000-OKZ000-TXZ000-102300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 20...CORRECTED

NWS STORM PREDICTION CENTER NORMAN OK

1150 AM CST WED MAR 10 2010



CORRECTED FOR CST VS CDT



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN ARKANSAS

       PARTS OF NORTHWEST LOUISIANA

       EASTERN OKLAHOMA

       PARTS OF NORTHEAST TEXAS



EFFECTIVE THIS WEDNESDAY MORNING AND AFTERNOON FROM 1150 AM UNTIL

500 PM CST.



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 65

STATUTE MILES EAST AND WEST OF A LINE FROM 70 MILES SOUTH

SOUTHEAST OF LONGVIEW TEXAS TO 50 MILES NORTHWEST OF FAYETTEVILLE

ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 19...



DISCUSSION...INTENSE UPPER TROUGH MOVING EWD ACROSS OK/N TX THIS

AFTERNOON WITH RAPIDLY DESTABILIZING AIR MASS ACROSS THE WATCH AREA.

 THUNDERSTORMS NOW NCENTRAL TX/SRN OK EXPECTED TO INTENSIFY THRU THE

AFTERNOON AS THEY MOVE/DEVELOP NEWD.  WITH STEEP LAPSE RATES AND

MLCAPES CLIMBING TO 1000 J/KG...THREAT OF LARGE HAIL AND DAMAGING

WINDS WILL INCREASE.



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 450. MEAN STORM

MOTION VECTOR 24035.





...HALES



897 

WWUS20 KWNS 101742 CCA

SEL0

SPC WW 101742 CCA

ARZ000-LAZ000-OKZ000-TXZ000-102300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 20...CORRECTED

NWS STORM PREDICTION CENTER NORMAN OK

1150 AM CST WED MAR 10 2010



CORRECTED FOR CST VS CDT



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN ARKANSAS

       PARTS OF NORTHWEST LOUISIANA

       EASTERN OKLAHOMA

       PARTS OF NORTHEAST TEXAS



EFFECTIVE THIS WEDNESDAY MORNING AND AFTERNOON FROM 1150 AM UNTIL

500 PM CST.



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 65

STATUTE MILES EAST AND WEST OF A LINE FROM 70 MILES SOUTH

SOUTHEAST OF LONGVIEW TEXAS TO 50 MILES NORTHWEST OF FAYETTEVILLE

ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 19...



DISCUSSION...INTENSE UPPER TROUGH MOVING EWD ACROSS OK/N TX THIS

AFTERNOON WITH RAPIDLY DESTABILIZING AIR MASS ACROSS THE WATCH AREA.

 THUNDERSTORMS NOW NCENTRAL TX/SRN OK EXPECTED TO INTENSIFY THRU THE

AFTERNOON AS THEY MOVE/DEVELOP NEWD.  WITH STEEP LAPSE RATES AND

MLCAPES CLIMBING TO 1000 J/KG...THREAT OF LARGE HAIL AND DAMAGING

WINDS WILL INCREASE.



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 450. MEAN STORM

MOTION VECTOR 24035.





...HALES

