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| #57825 (Received by flhurricane at: 9:37 PM 20.Nov.2005) TCDAT2 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 |
