MESOSCALE DISCUSSION 2407
   NWS STORM PREDICTION CENTER NORMAN OK
   0621 PM CST SUN NOV 30 2008
   
   AREAS AFFECTED...SRN FLORIDA PEN
   
   CONCERNING...TORNADO WATCH 940...
   
   VALID 010021Z - 010115Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 940 CONTINUES.
   
   REMAINING VALID PORTIONS OF WW MAY BE CONTINUED TIL 01Z EXPIRATION
   ...PERHAPS EXTENDED AN HOUR OR SO ACROSS SOUTHEAST COASTAL
   AREAS...BUT AN ADDITIONAL WW IS NOT ANTICIPATED.
   
   COOLING AND DRYING ASSOCIATED WITH VEERING AND WEAKENING LOW-LEVEL
   FLOW IS NOW UNDERWAY ACROSS ALL BUT SOUTHEAST COASTAL AREAS.  EVEN
   ACROSS THE MIAMI METRO...THOUGH...SURFACE TEMPERATURES HAVE BEGUN TO
   SUBTLY DROP OFF DAYTIME HIGHS.  COUPLED WITH LINGERING WARM LAYERS
   ALOFT...CONVECTIVE POTENTIAL REMAINS INHIBITED.  IT IS POSSIBLE THAT
   A WEAK PERTURBATION EMBEDDED WITHIN THE BROADER CYCLONIC UPPER FLOW
   MAY BE BRIEFLY ENHANCE ONGOING STORMS ALONG THE LEADING LOW-LEVEL
   CONFLUENCE ZONE APPROACHING SOUTHEAST FLORIDA.  AND...THIS ACTIVITY
   COULD STILL PRODUCE SOME GUSTY WINDS APPROACHING OR BRIEFLY
   EXCEEDING SEVERE LIMITS ACROSS THE MIAMI AREA.  TORNADO POTENTIAL IS
   A BIT MORE UNCERTAIN...BUT LOW-LEVEL SHEAR SEEMS TO REMAIN
   SUFFICIENTLY LARGE GIVEN THE MOISTURE CONTENT AND POTENTIAL BUOYANCY
   OF THE BOUNDARY LAYER.  ANY LINGERING SEVERE POTENTIAL IS EXPECTED
   TO DIMINISH AS THE CONFLUENCE ZONE SHIFTS EAST OF COASTAL AREAS
   DURING THE 01-02Z TIME FRAME.
   
   ..KERR.. 12/01/2008
   
   
   ATTN...WFO...MFL...KEY...
   
   LAT...LON   24728100 25218079 25368080 25738054 26487992 26227975
               25517992 25018028 24708075 24728100