000 AXNT20 KNHC 272337 TWDAT TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 805 PM EDT WED JUN 27 2012 TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL ANALYSIS. BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 2315 UTC. ...SPECIAL FEATURES... TROPICAL DEPRESSION DEBBY WAS DOWNGRADED TO POST-TROPICAL CYCLONE AT 27/2100 UTC AND IS CENTERED NEAR 29.5N 78.3W AT 27/2100 UTC OR ABOUT 155 NM E OF ST. AUGUSTINE FLORIDA MOVING E AT 11 KT. ESTIMATED MINIMUM CENTRAL PRESSURE IS 1003 MB. MAXIMUM SUSTAINED WIND SPEED IS 35 KT WITH GUSTS TO 45 KT. THIS IS THE LAST ADVISORY ISSUED BY THE NATIONAL HURRICANE CENTER. DEBBY HAS LOST ALL TROPICAL CHARACTERISTICS WITH SHOWERS/THUNDERSTORMS WELL REMOVED FROM THE LOW LEVEL CENTER. ...TROPICAL WAVES... TROPICAL WAVE EXTENDS FROM 15N36W THROUGH A WEAK 1013 MB LOW NEAR 10N38W TO 7N39W MOVING NNW NEAR 10 KT. WAVE IS EMBEDDED WITHIN A SURGE OF DEEP LAYER MOISTURE AS DEPICTED ON TOTAL PRECIPITABLE WATER IMAGERY. WAVE REMAINS TO THE S OF THE SAHARAN DUST THAT COVERS THE TROPICAL ATLC. SCATTERED SHOWERS/ISOLATED THUNDERSTORMS ARE WITHIN 45 NM OF 11N BETWEEN 37W-42W. TROPICAL WAVE EXTENDS FROM 18N75W TO 12N76W MOVING W 15-20 KT. WAVE IS LEADING A WEAK SURGE OF MOISTURE AS DEPICTED ON TOTAL PRECIPITABLE WATER IMAGERY. WAVE AS ALSO AT THE LEADING EDGE OF THE SAHARAN DUST THAT COVERS THE TROPICAL ATLC AND THE E CARIBBEAN. NO ASSOCIATED SHOWERS/CONVECTION ...ITCZ/MONSOON TROUGH... THE MONSOON TROUGH EXTENDS ACROSS W AFRICA INTO THE E TROPICAL ATLC NEAR 11N16W ALONG 10N25W TO 11N31W WITH THE ITCZ AXIS CONTINUING TO 11N36W THEN RESUMES W OF THE TROPICAL WAVE NEAR 8N41W CONTINUING ALONG 7N43W 7N49W TO INLAND OVER SOUTH AMERICA NEAR 5N55W. CLUSTERS OF SCATTERED MODERATE CONVECTION ARE WITHIN 150 NM OF LINE FROM 7N20W 8N27W TO 9N34W. ...DISCUSSION... GULF OF MEXICO... AN UPPER RIDGE DOMINATES THE GULF ANCHORED N OF THE YUCATAN PENINSULA NEAR 23N89W EXTENDING A RIDGE AXIS ACROSS S FLORIDA AND W OVER MEXICO NEAR TUXPAN. A SURFACE TROUGH AT 27/2100 UTC EXTENDS FROM S OF THE REMNANTS OF DEBBY OVER THE FLORIDA KEYS. SCATTERED SHOWERS/ISOLATED THUNDERSTORMS ASSOCIATED WITH THE REMNANTS OF DEBBY ARE S OF THE SURFACE TROUGH TO OVER CUBA E OF 82W INTO THE W ATLC. AFTERNOON THUNDERSTORMS HAVE DEVELOPED INLAND OVER THE YUCATAN PENINSULA AND ARE WITHIN 30/45 NM ALONG THE COAST BETWEEN 87W-92W. THIS IS LEAVING THE REMAINDER OF THE GULF UNDER CLEAR SKIES THIS EVENING. A RIDGE WILL BUILD ALONG 27N THROUGH MON. CARIBBEAN SEA... THE UPPER RIDGE OVER THE GULF OF MEXICO COVERS THE CARIBBEAN W OF A LINE FROM PUERTO RICO TO THE COSTA RICA/NICARAGUA BORDER WHERE AN INVERTED UPPER TROUGH EXTENDS FROM PANAMA TO THE VIRGIN ISLANDS. A SECOND UPPER RIDGE IS ANCHORED OVER THE SE CARIBBEAN NEAR 13N66W. SCATTERED SHOWERS/ISOLATED THUNDERSTORMS ASSOCIATED WITH THE REMNANTS OF DEBBY ARE N OF 20N TO OVER CUBA BETWEEN 80W-84W. MODERATE TO FRESH E TO SE TRADE WINDS ARE GENERATING ISOLATED SHOWERS AND POSSIBLE ISOLATED THUNDERSTORMS FROM 11N-19N BETWEEN 78W-84W. THIS IS LEAVING THE REMAINDER OF THE CARIBBEAN UNDER CLEAR SKIES THIS EVENING. THE TRADE WINDS WILL PREVAIL ACROSS MUCH OF THE CARIBBEAN WITH OCCASIONALLY HIGHER WINDS ALONG THE N COAST OF SOUTH AMERICA THROUGH THU. THE TROPICAL WAVE WILL SHIFT INTO THE SW CARIBBEAN AND BECOME DIFFUSE OVERNIGHT. ATLANTIC OCEAN... AN UPPER TROUGH COVERS THE W ATLC N OF 27N BETWEEN 72W-82W SUPPORTING A QUASI STATIONARY FRONT THAT EXTENDS AT 27/2100 UTC ALONG 32N76W TO INLAND OVER FLORIDA NEAR DAYTONA BEACH. THE REMNANTS OF DEBBY OFF THE FLORIDA COAST ARE BECOMING ABSORBED INTO THIS FRONTAL BOUNDARY. A SURFACE TROUGH EXTENDS S FROM THE REMNANTS OF DEBBY ALONG 27N85W THEN TO OVER THE FLORIDA KEYS. SCATTERED SHOWERS/ISOLATED THUNDERSTORMS ARE WITHIN 150/180 NM SE OF THE SURFACE TROUGH AND THE FRONTAL BOUNDARY. THE UPPER RIDGE ANCHORED OVER THE GULF OF MEXICO EXTENDS A RIDGE AXIS INTO THE W ATLC ACROSS S FLORIDA ALONG 26N74W TO BEYOND 32N61W. DIFFLUENCE ALOFT N OF THE UPPER RIDGE AXIS IS ENHANCING THE ACTIVITY ABOVE. A BROAD SURFACE RIDGE DOMINATES THE REMAINDER OF THE ATLC W OF 70W WITH A WEAKNESS IN THE E/CENTRAL ATLC IN THE IMMEDIATE VICINITY OF A SURFACE TROUGH THAT EXTENDS FROM 31N32W ALONG 29N40W TO 22N49W. THE SURFACE RIDGE IS ANCHORED WELL N OF THE DISCUSSION AREA. SATELLITE IMAGERY CONTINUES TO SHOW A BROAD AREA OF SAHARAN DUST COVERING THE E CARIBBEAN AND TROPICAL ATLC S OF 20N E OF THE CARIBBEAN TROPICAL WAVE. THE DUST REMAINS THICKER E OF 30W AND AS FAR N AS 50N SPREADING TO OVER SPAIN AND PORTUGAL. THE REMNANTS OF DEBBY WILL CONTINUE TO PRODUCE GALE FORCE WINDS AS THEY MOVE TO 30N74W THU AFTERNOON AND PASS N OF THE AREA TO 32N69W FRI AFTERNOON. HIGH PRESSURE WILL BUILD S OF THE REMNANTS OF DEBBY THROUGH MON. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ PAW