

323 

WWUS20 KWNS 251852

SEL5

SPC WW 251852

ALZ000-ARZ000-KYZ000-MOZ000-MSZ000-TNZ000-260000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 35

NWS STORM PREDICTION CENTER NORMAN OK

150 PM CDT THU MAR 25 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF NORTHERN ALABAMA

       SMALL PARTS OF NORTHEAST ARKANSAS

       PARTS OF SOUTHWEST KENTUCKY

       MISSOURI BOOTHEEL

       PARTS OF NORTHERN MISSISSIPPI

       WESTERN AND PARTS OF MIDDLE TENNESSEE



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 150 PM UNTIL

700 PM 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 90

STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES WEST

NORTHWEST OF FORT CAMPBELL KENTUCKY TO 40 MILES SOUTHEAST OF

TUPELO MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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...LOW TOPPED THUNDERSTORMS EXPECTED TO INCREASE RAPIDLY

ACROSS THE WATCH AS STRONG UPPER VORT/COLD POOL ROTATES ACROSS THE

MS RIVER IN TN VALLEY THIS AFTERNOON.  SHEAR PROFILES WILL BE STRONG

AND PARTICULARLY EASTERN PORTION OF WATCH SUPPORT ROTATING STORMS.

WHILE INSTABILITY WILL REMAIN GENERALLY LESS THAN 1000 J/KG OF

MUCAPE...THE STEEP LAPSE RATES AND STRONG ASCENT ALONG WITH SHEAR

SUPPORT NOT ONLY MARGINALLY SEVERE HAIL BUT WIND DAMAGE.

ADDITIONALLY IF SUPERCELLS ARE ABLE TO DEVELOP A BRIEF TORNADO

THREAT AND LARGER HAIL WILL ALSO BE POSSIBLE.



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 300. MEAN STORM

MOTION VECTOR 24035.





...HALES

