000 AXNT20 KNHC 120557 CCA TWDAT TROPICAL WEATHER DISCUSSION...CORRECTION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 105 AM EST THU FEB 12 2009 ...CORRECTED FOR SATELLITE IMAGERY THROUGH TIME... 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...METEOROLOGICAL ANALYSIS...WEATHER OBSERVATIONS...AND RADAR. BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 0515 UTC. ...THE ITCZ... ITCZ IS CENTERED ALONG 6N9W 1N30W CROSSING THE EQUATOR NEAR 35W...AND INTO NE BRAZIL NEAR 2S46W. SCATTERED MODERATE TO STRONG CONVECTION IS S OF 2N BETWEEN 22W-29W. ...DISCUSSION... GULF OF MEXICO... STRONG WESTERLY FLOW ALOFT IS PRESENT ACROSS THE N GULF IN THE BASE OF A VIGOROUS DEEP LAYER TROUGH MOVING EWD ACROSS THE ERN CONUS. A SURFACE COLD FRONT ASSOCIATED WITH THIS TROUGH CROSSES THE FLORIDA PANHANDLE AND INTO THE GULF NEAR PANAMA CITY EXTENDING SW TO NEAR 26N90W TO 22N95W TO 19N96W. NLY WINDS AND A RELATIVELY COOLER AND DRIER AIRMASS ARE OBSERVED N OF THIS FRONT. LOW-LEVEL CONVERGENCE IS SUPPORTING SCATTERED SHOWERS WITHIN 90 NM EITHER SIDE OF THE COLD FRONT. THIS ACTIVITY IS BEING ENHANCED BY UPPER LEVEL DIVERGENCE ASSOCIATED WITH THE AFOREMENTIONED VIGOROUS DEEP LAYER TROUGH. ELSEWHERE...A SURFACE RIDGE EXTENDS FROM A 1028 MB HIGH ANCHORED IN THE W ATLC ACROSS SRN FLORIDA AND THE SE GULF. SUBSIDENCE ASSOCIATED WITH THIS RIDGE IS COMBINING WITH DRY AIR AND A STABLE ATMOSPHERE ALOFT TO INHIBIT DEEP CONVECTION. CARIBBEAN SEA... GENERALLY FAIR WEATHER IS PRESENT ACROSS THE WRN CARIBBEAN... WHERE DEEP LAYER DRY AIR AND CONFLUENT WESTERLY FLOW ARE OBSERVED. UPPER LEVEL MOISTURE CONTINUES TO BE ADVECTED NEWD INTO THE ERN CARIBBEAN...WITH SCATTERED SHOWERS E OF 70W. STRONG TRADE WINDS S OF A 1028 MB SURFACE HIGH IN THE W ATLC NEAR 29N61W ARE OCCURRING AND ARE FORECAST TO CONTINUE ACROSS MUCH OF THE CARIBBEAN THROUGH THURSDAY. ATLANTIC OCEAN... STRONG SOUTHWESTERLY FLOW ALOFT CONTINUES ACROSS THE SW NORTH ATLC AS THE VIGOROUS DEEP LAYER TROUGH OVER THE ERN CONUS MOVES EWD. A SURFACE COLD FRONT ASSOCIATED WITH THIS TROUGH IS FORECAST TO ENTER THE SW NORTH ATLC DURING THE NEXT DAY... FOLLOWED BY W TO NW WINDS AND RELATIVELY COOLER AND DRIER CONDITIONS. FARTHER TO THE E...DEEP LAYER DRY AIR AND SUBSIDENCE ARE PRESENT IN THE VICINITY OF A 1028 MB SURFACE HIGH NEAR 29N61W. ACROSS THE CENTRAL ATLC...A DEEP LAYER TROUGH IS PRESENT WITH AN ASSOCIATED WEAKENING SURFACE COLD FRONT EXTENDING FROM 25N41W TO BEYOND 32N33W. A PRE-FRONTAL SURFACE TROUGH IS ALSO ANALYZED FROM 27N36W TO 21N42W SE OF THE COLD FRONT. LOW-LEVEL CONVERGENCE IN THE VICINITY OF THESE BOUNDARIES IS SUPPORTING SCATTERED SHOWERS N OF 20N BETWEEN 33W-43W. IN THE ERN ATLC... FAIR WEATHER CONDITIONS ARE OBSERVED...WHERE SUBSIDENCE ASSOCIATED WITH A SURFACE RIDGE IS PRESENT. ACROSS THE TROPICAL ATLC...AN UPPER HIGH IS PRESENT NEAR 5N42W. UPPER LEVEL DIVERGENCE ASSOCIATED WITH THIS HIGH IS ENHANCING THE CONVECTION ASSOCIATED WITH THE ITCZ. $$ HUFFMAN