000 AXNT20 KNHC 180616 CCA TWDAT TROPICAL WEATHER DISCUSSION...COR NWS NATIONAL HURRICANE CENTER MIAMI FL 205 AM EDT MON APR 18 2011 CORRECTION TO UPDATE THE SECTION FOR THE ATLANTIC OCEAN THAT IS TO THE EAST OF 70W TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTION 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 GOES-13 SATELLITE IMAGERY THROUGH 0415 UTC...AND METEOSAT 9 IMAGERY THROUGH 18/0545 UTC. ...THE ITCZ... FROM THE SOUTHWESTERN CORNER OF THE IVORY COAST TO 2N10W... CROSSING THE EQUATOR ALONG 12W...TO 2S29W...INTO NORTHEASTERN BRAZIL NEAR 3S42W. STRONG RAINSHOWERS AND THUNDERSTORMS ARE FROM 2N TO 3N BETWEEN 15W AND 19W...AND WITHIN A 15 NM TO 30NM RADIUS OF 2N28W. ISOLATED MODERATE RAINSHOWERS ARE ELSEWHERE TO THE SOUTH OF 6N TO THE EAST OF 40W...AND FROM THE EQUATOR TO 7N BETWEEN 40W AND 50W. ...DISCUSSION... FROM THE ATLANTIC OCEAN THAT IS TO THE WEST OF 70W... INTO THE GULF OF MEXICO... UPPER LEVEL WESTERLY WIND FLOW SPANS THE AREA. A DEEP LAYER TROUGH IS ALONG THE U.S.A. EAST COAST...PASSING THROUGH 32N78W TO SOUTHEASTERN FLORIDA. THIS TROUGH SUPPORTS THE COLD FRONT THAT PASSES THROUGH 32N72W TO 25N77W. A STATIONARY FRONT CONTINUES FROM 25N77W TO SOUTHERN FLORIDA FROM 25N TO 26N... INTO THE SOUTHEASTERN CORNER OF THE GULF OF MEXICO NEAR 24N85W. RAINSHOWERS AND POSSIBLE THUNDERSTORMS ARE IN THE ATLANTIC OCEAN FROM 29N TO 31N BETWEEN 71W AND 74W. RAINSHOWERS ARE POSSIBLE IN SOUTHEASTERN FLORIDA FROM 25N TO 27N. SURFACE ANTICYCLONIC FLOW MOVES AROUND A RIDGE THAT EXTENDS FROM 1017 MB HIGH PRESSURE THAT IS NEAR 29N86W TOWARD THE COAST OF THE DEEP SOUTH OF TEXAS. THE CARIBBEAN SEA... BROAD UPPER LEVEL WESTERLY WIND FLOW SPANS THE AREA. A SURFACE TROUGH STILL IS IN THE ATLANTIC OCEAN ALONG 56W/57W FROM 14N TO 24N. THIS TROUGH IS FORECAST TO MOVE NORTHWESTWARD DURING THE NEXT 48 HOURS...POSSIBLY CLIPPING THE NORTHEASTERN CORNER OF THE AREA. RAINSHOWERS ARE POSSIBLE IN BROKEN MULTILAYERED CLOUDS THAT COVER THE WATERS FROM 15N TO HISPANIOLA BETWEEN 70W AND 75W...IN THE WATERS BETWEEN CUBA AND JAMAICA... WITHIN 90 NM TO THE SOUTH OF PUERTO RICO...IN CLOUD LINES THAT ARE TO THE SOUTH OF 17N BETWEEN 60W AND 70W...FROM 15N TO 18N BETWEEN 77W AND 84W...AND TO THE SOUTH OF 12N BETWEEN 80W AND THE SOUTHEASTERN CORNER OF NICARAGUA THE ATLANTIC OCEAN THAT IS TO THE EAST OF 70W... AN UPPER LEVEL TROUGH IS ALONG 55W/56W FROM 21N BEYOND 32N. A SURFACE TROUGH IS IN THE ATLANTIC OCEAN ALONG 56W/57W FROM 14N TO 24N. SCATTERED MODERATE RAINSHOWERS AND POSSIBLE THUNDERSTORMS ARE FROM 21N TO 27N BETWEEN 54W AND 57W. BROKEN TO OVERCAST HIGH CLOUDS ARE TO THE EAST OF THE TROUGH FROM 21N TO 32N BETWEEN 45W AND 55W. AN UPPER LEVEL CYCLONIC CIRCULATION CENTER IS NEAR 34N31W. IT HAS BEEN MOVING SOUTHWARD WITH TIME. ACCOMPANYING CYCLONIC FLOW IS TO THE NORTH OF 23N BETWEEN 25W AND 40W. THIS FEATURE SUPPORTS A COLD FRONT THAT PASSES THROUGH 33N30W TO 30N38W AND 31N45W. A STATIONARY FRONT CONTINUES FROM 31N45W BEYOND 32N50W. PRECIPITATION IS POSSIBLE WITHIN 30 NM ON EITHER SIDE OF THE FRONT. NO DEEP CONVECTIVE PRECIPITATION IS APPARENT IN SATELLITE IMAGERY. A 999 MB LOW PRESSURE CENTER IS NEAR 32N20W. A SURFACE TROUGH EXTENDS FROM THE LOW CENTER TO 30N15W...ACROSS THE CANARY ISLANDS...TO 25N18W AND 23N22W. ANY PRECIPITATION IS TO THE NORTH OF 32N. A SURFACE RIDGE IS ALONG 9N33W 18N35W 24N42W 30N45W. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ MT