

475 

WWUS20 KWNS 160949

SEL1

SPC WW 160949

MOZ000-161400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 431

NWS STORM PREDICTION CENTER NORMAN OK

450 AM CDT TUE JUN 16 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN MISSOURI



EFFECTIVE THIS TUESDAY MORNING FROM 450 AM UNTIL 900 AM CDT.



HAIL TO 2 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 45

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTH OF

JOPLIN MISSOURI TO 55 MILES SOUTHEAST OF VICHY MISSOURI.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU1).



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 429...WW 430...



DISCUSSION...AN INTENSE BOW ECHO HAS DEVELOPED OVER SOUTHEAST KS AND

IS RACING INTO SOUTHWEST MO AT OVER 40 KNOTS.  THIS ACTIVITY IS

MOVING THROUGH AREAS RECENTLY STABILIZED BY EARLIER MCS...BUT HAS

APPARENTLY RAPIDLY DESTABILIZED VIA STRONG WESTERLY LOW LEVEL JET.

DAMAGING WINDS AND HAIL WILL BE POSSIBLE WITH BOW AND STORMS FORMING

AHEAD OF LINE.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 27040.





...HART

