000 AXNT20 KNHC 100245 CCA TWDAT TROPICAL WEATHER DISCUSSION...CORRECTED NWS NATIONAL HURRICANE CENTER MIAMI FL 805 PM EDT FRI MAY 09 2014 CORRECTED ISSUANCE 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...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL ANALYSIS. BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 2345 UTC. ...THE ITCZ/THE MONSOON TROUGH... THE MONSOON TROUGH PASSES THROUGH COASTAL SECTIONS OF SIERRA LEONE NEAR 11N15W TO 4N21W. THE ITCZ CONTINUES FROM 4N21W...TO THE EQUATOR ALONG 28W...MEANDERING SOUTH OF THE EQUATOR TO THE COAST OF SOUTH AMERICA NEAR 2S44W. SCATTERED MODERATE ISOLATED STRONG FROM THE EQUATOR TO 5N BETWEEN THE PRIME MERIDIAN AND 15W. SCATTERED MODERATE FROM THE EQUATOR TO 4N BETWEEN 26W AND 43W. ...DISCUSSION... ...THE GULF OF MEXICO... A MID-TO UPPER LEVEL RIDGE EXTENDS FROM AN ANTICYCLONE OVER BELIZE ACROSS THE GULF OF MEXICO ALONG A SOUTHWEST-TO-NORTHEAST LINE...FROM THE SE BAY OF CAMPECHE TO THE FLORIDA PANHANDLE. A DEEP LAYER TROUGH IS DIGGING THROUGH THE CENTRAL U.S...THROUGH CENTRAL OKLAHOMA TO SOUTH TEXAS...AND INTO NORTHERN MEXICO. MID AND UPPER LEVEL MOISTURE SPANS MOST OF THE GULF OF MEXICO. A SURFACE RIDGE IS ALONG 30N/31N FROM 70W IN THE ATLANTIC OCEAN AND EXTENDS ACROSS THE GULF COAST TO EASTERN TEXAS. LIGHT TO MODERATE SOUTHEAST WINDS COVER THE AREA. SURFACE OBSERVATIONS OVER THE GULF INDICATE LOW CLOUD CEILINGS AND WIDESPREAD FOG MAINLY NORTH OF 27N AND WEST OF 90W. NATIONAL MOSAIC WSR-88D INDICATED WIDESPREAD SHOWERS AND THUNDERSTORMS ALONG THE IMMEDIATE GULF COAST FROM MOBILE ALABAMA TO CENTRAL LOUISIANA AND ALONG THE TEXAS COAST S OF GALVESTON. THE ACTIVITY EXTENDED OUT 90-120 NM S OF THE LOUISIANA COAST. SOUTHEASTERLY WINDS ARE FORECAST OVER THE WEEKEND WITH THE BULK OF THE SHOWER AND THUNDERSTORM ACTIVITY FORECAST TO MOVE EASTWARD OVER THE GULF E OF 90W ON SAT AND SUN. ...THE CARIBBEAN SEA... A MID-TO UPPER LEVEL TROUGH EXTENDS FROM THE CENTRAL ATLANTIC OCEAN NEAR 32N60W...SOUTHWARD THROUGH AN ELONGATED CYCLONIC CIRCULATION NE OF HISPANIOLA NEAR 21N66W TO A BASE NEAR 10N72W. AN ANTICYCLONE OVER BELIZE AND ASSOCIATED FLOW COVERS THE CARIBBEAN W OF 80W. DEEP LAYERED SUBSIDENCE WAS NOTED OVER THE CARIBBEAN BETWEEN 70W AND 80W...INCLUDING CUBA AND WESTERN HISPANIOLA. STRONG UPPER LEVEL DIFFLUENCE EAST OF THE TROUGH/CYCLONIC CIRCULATION WAS ENHANCING SHOWERS AND THUNDERSTORMS OVER THE NE CARIBBEAN IN THE VICINITY OF A SURFACE TROUGH WHICH IS ALONG 65W FROM 14N TO 20N. 24-HOUR RAINFALL TOTALS FOR THE PERIOD ENDING AT 09/1200 UTC WERE 3.28 INCHES IN ST. THOMAS IN THE U.S. VIRGIN ISLANDS AND 1.68 IN SAN JUAN PUERTO RICO. ADDITIONAL HEAVY RAINFALL IS POSSIBLE IN THE NE CARIBBEAN BEFORE THE PRECIPITATION MOVES NW OF THE AREA LATE SAT AND SUN. THE REMAINDER OF THE CARIBBEAN WAS UNDER FAIR SKIES WITH MODERATE TRADE WIND FLOW NOTED. ...HISPANIOLA... HISPANIOLA WAS SITUATED TO THE WEST OF THE UPPER LEVEL TROUGH WHICH EXTENDED THROUGH THE EASTERN CARIBBEAN IN THE VICINITY OF PUERTO RICO AND THE VIRGIN ISLANDS INTO THE CARIBBEAN SEA. AS THE TROUGH MOVES WESTWARD WITH A DEVELOPING UPPER LOW EXPECTED TO MOVE N OF THE AREA...SHOWER AND THUNDERSTORM ACTIVITY SHOULD REMAIN DIURNAL IN NATURE WITH MORE WIDESPREAD ACTIVITY EXPECTED OVER THE ATLANTIC N OF THE ISLANDS. ...THE ATLANTIC OCEAN... A MID-TO UPPER LEVEL TROUGH EXTENDS FROM THE CENTRAL ATLANTIC OCEAN NEAR 32N60W...SOUTHWARD THROUGH AN ELONGATED CYCLONIC CIRCULATION NE OF HISPANIOLA NEAR 21N66W TO A BASE NEAR 10N72W. THIS TROUGH WAS PROVIDING LIMITED SUPPORT FOR A DISSIPATING STATIONARY FRONT EXTENDING THROUGH 32N43W THROUGH 25N55W TO 20N62W. ANOTHER STATIONARY FRONT EXTENDED FROM 29N51W TO 24N73W. AN EASTERN ATLANTIC OCEAN MIDDLE LEVEL TO UPPER LEVEL CYCLONIC CIRCULATION CENTER IS NEAR 18N31W. CYCLONIC FLOW AROUND THE CENTER COVERED THE ATLANTIC OCEAN FROM 9N TO 27N BETWEEN 20W AND 45W. COMPARATIVELY DRIER AIR IN SUBSIDENCE...IS APPARENT IN WATER VAPOR SATELLITE IMAGERY...IS TO THE NORTH OF 10N TO THE EAST OF 43W. CONVECTIVE PRECIPITATION IN THE ATLANTIC OCEAN WAS CONFINED TO SCATTERED MODERATE ACTIVITY FROM 16N TO 20N BETWEEN 57W AND 64W EXTENDING OVER PUERTO RICO....THE VIRGIN ISLANDS AND THE LEEWARD ISLANDS. A SURFACE RIDGE EXTENDS FROM A 1025 MB HIGH PRESSURE CENTER NEAR 36N25W...THROUGH 37N40W...TO 32N60W TO 31N75W. SURFACE ANTICYCLONIC WIND FLOW COVERS THE ATLANTIC OCEAN TO THE NORTH OF 10N TO THE EAST OF THE 30N48W 25N57W 20N63W DISSIPATING STATIONARY FRONT. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ COBB