

411 

WWUS20 KWNS 062210

SEL5

SPC WW 062210

ALZ000-MSZ000-070300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 475

NWS STORM PREDICTION CENTER NORMAN OK

510 PM CDT FRI JUL 6 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN ALABAMA

       CENTRAL MISSISSIPPI



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 510 PM UNTIL

1000 PM CDT.



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 105

STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHEAST OF

GREENWOOD MISSISSIPPI TO 60 MILES EAST OF JACKSON 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.



OTHER WATCH INFORMATION...CONTINUE...WW 474...



DISCUSSION...CLUSTERS OF STRONG TO SVR PULSE TSTMS IN NE MS APPEARS

TO HAVE DEVELOPED A SUFFICIENTLY STRONG COLD POOL THAT MAY SUPPORT

CONTINUED SW STORM PROPAGATION GIVEN 20-25 KT 700 MB FLOW /PER VWP

DATA/ AND CORRIDOR OF RICH LOW LVL MOISTURE ACROSS REGION /PER SFC

OBS AND STLT-GPS DERIVED PW/.  OTHER STORMS MAY FORM IN ZONE OF

UPLIFT AND ENHANCED LOW LVL INSTABILITY ALONG/AHEAD OF OUTFLOW

BOUNDARY OVER NW AND W CNTRL AL.  SETUP MAY YIELD NARROW CORRIDORS

OF LOCALLY DMGG WIND AND POSSIBLY MARGINALLY SVR HAIL THROUGH LATE

EVE.



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 500. MEAN STORM

MOTION VECTOR 05020.





...CORFIDI

