

649 

WWUS20 KWNS 200332

SEL0

SPC WW 200332

ARZ000-MOZ000-201000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 90

NWS STORM PREDICTION CENTER NORMAN OK

1035 PM CDT MON MAR 19 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTH CENTRAL ARKANSAS

       SOUTHERN MISSOURI



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 1035 PM

UNTIL 500 AM CDT.



HAIL TO 1 INCH 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 40

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES SOUTH

SOUTHWEST OF HARRISON ARKANSAS TO 5 MILES NORTH NORTHEAST OF FORT

LEONARD WOOD MISSOURI.  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 87...WW 88...WW 89...



DISCUSSION...BOWING SQUALL LINE OVER NORTHWEST AR WILL TRACK

NORTHEASTWARD INTO SOUTHERN MO DURING THE NEXT FEW HOURS.  STORMS

ARE IN A REGION OF ONLY MARGINAL INSTABILITY...BUT VERY STRONG

ENVIRONMENTAL WIND FIELDS AND PRESENCE OF LOW LEVEL BOUNDARY WILL

PROMOTE A RISK OF DAMAGING WINDS AND HAIL IN THE STRONGEST CELLS.

THE POTENTIAL FOR QLCS TORNADOES IS ALSO NON-ZERO.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION

VECTOR 23035.





...HART

