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Tropical Storm GAMMA


ZCZC MIATCDAT2 ALL
TTAA00 KNHC DDHHMM
TROPICAL DEPRESSION GAMMA DISCUSSION NUMBER  21
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
10 PM EST SUN NOV 20 2005
 
GAMMA CONTINUES TO HAVE A WELL-DEFINED LOW-LEVEL CIRCULATION...BUT
ALSO CONTINUES TO LACK ORGANIZED DEEP CONVECTION.  THUS THE SYSTEM
NO LONGER QUALIFIES AS A TROPICAL CYCLONE...AND ADVISORIES ARE
BEING DISCONTINUED AT THIS TIME.  STRONG SOUTH-SOUTHWESTERLY SHEAR
IS LIKELY TO CONTINUE OVER THE CIRCULATION AND DISCOURAGE THE
REDEVELOPMENT OF PERSISTENT DEEP CONVECTION NEAR THE CENTER.
ADDITIONALLY...IN 24 HOURS OR SO...A COLD FRONT IS FORECAST TO
SWEEP INTO THE NORTHWESTERN CARIBBEAN SEA.  IT IS EXPECTED THAT THE
REMNANT LOW OF GAMMA WILL EITHER BECOME ABSORBED BY THIS FRONT OR
DISSIPATE AHEAD OF THE FRONT.
 
GAMMA HAS BEEN DRIFTING VERY SLOWLY NORTHWARD.  THE LOW-LEVEL RIDGE
TO THE NORTH OF THE CYCLONE IS DISSIPATING AS THE AFOREMENTIONED
FRONT ENTERS THE PICTURE.  AN INCREASING WESTERLY COMPONENT OF
LOW-LEVEL STEERING IS FORECAST...WHICH SHOULD TURN GAMMA'S REMNANTS
NORTHEASTWARD TO EASTWARD UNTIL DISSIPATION.

THIS IS THE LAST ADVISORY ISSUED BY THE NATIONAL HURRICANE CENTER ON
GAMMA UNLESS REGENERATION...WHICH APPEARS UNLIKELY...OCCURS.
ADDITIONAL INFORMATION ON THE REMNANT LOW OF GAMMA CAN BE FOUND IN
HIGH SEAS FORECASTS ISSUED BY THE NATIONAL WEATHER SERVICE...UNDER
AWIPS HEADER NFDHSFAT1 AND WMO HEADER FZNT01 KWBC...AND IN OFFSHORE
WATERS FORECASTS UNDER AWIPS HEADER  MIAOFFNT3 AND UNDER WMO HEADER
FZNT23 KNHC.  
 
FORECASTER PASCH
 
FORECAST POSITIONS AND MAX WINDS
 
INITIAL      21/0300Z 17.2N  85.5W    25 KT...DISSIPATING
 12HR VT     21/1200Z 17.4N  85.2W    25 KT...REMNANT LOW
 24HR VT     22/0000Z 17.5N  84.0W    25 KT...REMNANT LOW
 36HR VT     22/1200Z 17.5N  82.0W    20 KT...REMNANT LOW
 48HR VT     23/0000Z...DISSIPATED
 
$$
NNNN


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Page last modified: Monday, 21-Nov-2005 02:40:27 UTC