

142 

WWUS20 KWNS 182020

SEL6

SPC WW 182020

ARZ000-LAZ000-OKZ000-TXZ000-190300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 36

NWS STORM PREDICTION CENTER NORMAN OK

220 PM CST MON FEB 18 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN ARKANSAS

       NORTHWEST LOUISIANA

       SOUTHEAST OKLAHOMA

       NORTHEAST TEXAS



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 220 PM UNTIL 900

PM CST.



HAIL TO 1.5 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 75

STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH OF

RUSSELLVILLE ARKANSAS TO 30 MILES SOUTHEAST OF LONGVIEW TEXAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU6).



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.



DISCUSSION...SCATTERED THUNDERSTORMS ARE INCREASING AHEAD OF AN

APPROACHING COLD FRONT.  STEEP LAPSE RATES AND COLD TEMPERATURES

ALOFT WILL PROMOTE A FEW INTENSE STORMS THIS AFTERNOON WITH A RISK

OF HAIL.  CONVECTION WILL LIKELY BECOME MORE WIDESPREAD AND

ORGANIZED INTO A SQUALL LINE THIS EVENING WITH AN INCREASING RISK OF

LOCALLY DAMAGING WINDS ACROSS PARTS OF AR/LA.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM

MOTION VECTOR 24035.





...HART

