000 AXNT20 KNHC 220718 CCA TWDAT TROPICAL WEATHER DISCUSSION...COR NWS NATIONAL HURRICANE CENTER MIAMI FL 205 AM EDT MON APR 22 2013 CORRECTION IN ORDER TO UPDATE THE CONVECTIVE PRECIPITATION INFORMATION FOR THE ITCZ/THE MONSOON TROUGH... 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 0515 UTC. ...THE ITCZ/THE MONSOON TROUGH... THE MONSOON TROUGH PASSES THROUGH SOUTHERN COASTAL SIERRA LEONE...JUST OFF THE BORDER WITH LIBERIA... NEAR 7N12W...TO 5N16W AND 4N21W. THE ITCZ CONTINUES FROM 4N21W TO 4N40W 4N45W...INTO NORTHEASTERN BRAZIL TO THE BORDER OF THE SOUTHERN PART OF FRENCH GUIANA NEAR 2N54W. CONVECTIVE PRECIPITATION...NUMEROUS STRONG FROM 2N TO 3N BETWEEN 2W AND 4W...FROM 4N TO 6N BETWEEN 14W AND 20W...FROM 4N TO 5N BETWEEN 34W AND 38W...SCATTERED STRONG FROM 4N TO 5N BETWEEN 41W AND 52W. SCATTERED MODERATE TO ISOLATED STRONG FROM 4N TO 5N BETWEEN 9W AND 13W...AND FROM 6N TO 7N BETWEEN 52W AND 53W. ISOLATED MODERATE ELSEWHERE TO THE SOUTH OF 6N BETWEEN 20W AND 37W. ...DISCUSSION... THE GULF OF MEXICO... A MIDDLE LEVEL TO UPPER LEVEL TROUGH PASSES THROUGH 30N87W...JUST TO THE SOUTH OF THE WESTERN FLORIDA PANHANDLE...TO 26N89W. THE REST OF THE MIDDLE LEVEL TO UPPER LEVEL WIND FLOW IS NORTHWESTERLY ACROSS THE GULF OF MEXICO. ONE SURFACE TROUGH IS ALONG 28N87W 24N89W...TO 20N89W IN THE NORTHERN PART OF THE YUCATAN PENINSULA. SCATTERED STRONG CONVECTIVE PRECIPITATION WAS COVERING THE AREA FROM 24N TO 29N BETWEEN 84W AND 88W...AND FROM 22N TO 23N BETWEEN 86W AND 87W...AT 21/2015 UTC. SCATTERED TO NUMEROUS STRONG CONVECTIVE PRECIPITATION NOW IS IN THE SOUTHEASTERN CORNER OF THE GULF OF MEXICO FROM 24N TO 25N BETWEEN 82W AND 83W BETWEEN THE FLORIDA KEYS AND CUBA...AND TO THE NORTH OF 30N BETWEEN 76W AND 80W IN THE ATLANTIC OCEAN. A SECOND SURFACE TROUGH IS IN FLORIDA FROM 30N80W TO 28N81W AND 25N81W. SCATTERED MODERATE TO ISOLATED STRONG CONVECTIVE PRECIPITATION COVERS THE ATLANTIC OCEAN...FLORIDA... AND THE GULF OF MEXICO FROM 26N TO 30N BETWEEN 78W AND 85W. THE OBSERVATIONS FOR THE TEXAS AND LOUISIANA COASTAL PLAINS STATIONS SHOW CLEAR SKIES/FAIR SKIES AT 12000 FEET OR LOWER. THE NAVAL AIR STATION IN KINGSVILLE...KNQI...IS REPORTING A LOW CLOUD CEILING. PATTERSON MEMORIAL AIRPORT IN PATTERSON LOUISIANA IS REPORTING A LOW CLOUD CEILING OF 200 FEET. THE VISIBILITIES IN PASCAGOULA MISSISSIPPI WERE LOWER THAN 2 MILES FOR THE LAST FEW OBSERVATIONS. THE VISIBILITY HAS GONE TO 4 MILES FOR THE LAST REPORT. LOW CLOUD CEILINGS...RANGING IN HEIGHT FROM 5000 FEET TO 7000 FEET...COVER FLORIDA FROM PERRY FLORIDA WESTWARD. LOW LEVEL AND MIDDLE LEVEL CLOUD CEILINGS WITH PRECIPITATION COVER FLORIDA TO THE SOUTH OF PERRY. FOR THE OFFSHORE OIL PLATFORM SITES THAT ARE TO THE NORTH OF 27N TO THE WEST OF 88W... ICAO STATION KHQI IS REPORTING A VISIBILITY OF 1.5 MILES AND HAZE. LOW LEVEL CLOUD CEILINGS ARE AT ICAO STATION KGUL AND ICAO STATION KMYT. THE CARIBBEAN SEA... A MIDDLE LEVEL TO UPPER LEVEL TROUGH EXTENDS FROM AN ATLANTIC OCEAN CYCLONIC CIRCULATION CENTER THAT IS NEAR 20N60W...INTO THE EASTERN CARIBBEAN SEA NEAR 14N65W AND 13N66W. RAINSHOWERS ARE POSSIBLE FROM 12N TO 16N BETWEEN 60W AND 70W IN THE CARIBBEAN SEA...AND FROM 10N TO 20N BETWEEN 54W AND 60W IN THE ATLANTIC OCEAN. THE TOTAL PRECIPITATION AMOUNT FOR THE 24-HOUR TIME PERIOD ENDING AT 19/1200 UTC FOR GUADELOUPE IS 0.26 OF AN INCH...ACCORDING TO THE PAN AMERICAN TEMPERTATURE AND PRECIPITATION TABLE...MIATPTPAN. MIDDLE LEVEL TO UPPER LEVEL NORTHWESTERLY WIND FLOW MOVES FROM THE GULF OF MEXICO INTO AND ACROSS THE CARIBBEAN SEA. THE WIND FLOW BECOMES MORE NORTHERLY TO THE SOUTH OF 17N TO THE WEST OF 79W. THE WIND FLOW REMAINS NORTHWESTERLY EVERYWHERE ELSE...AND IT EVENTUALLY MERGES WITH THE WIND FLOW THAT IS MOVING AROUND THE 20N60W 14N65W 13N66W TROUGH. UPPER LEVEL SOUTHWESTERLY WIND FLOW FROM SOUTH AMERICA IS TO THE SOUTH OF 14N60W 12N70W 12N76W. RAINSHOWERS ARE POSSIBLE ELSEWHERE FROM 16N TO 20N BETWEEN 60W AND 71W. A SURFACE RIDGE PASSES THROUGH THE ATLANTIC OCEAN NEAR 23N64W...INTO THE EASTERN CARIBBEAN SEA NEAR 17N64W. THE MONSOON TROUGH IS ALONG 8N73W IN COLOMBIA... TO 9N79W IN PANAMA...BEYOND 9N83W IN THE SOUTHERN COSTA RICA...INTO THE EASTERN PACIFIC OCEAN. CONVECTIVE PRECIPITATION...SCATTERED STRONG FROM 8N TO 9N BETWEEN 78W AND 79W IN PANAMA...AND FROM 9N TO 10N BETWEEN 73W AND 75W IN COLOMBIA. THE ATLANTIC OCEAN... MIDDLE LEVEL TO UPPER LEVEL SOUTHWESTERLY WIND FLOW IS IN THE WESTERN ATLANTIC OCEAN TO THE NORTH OF 28N TO THE WEST OF 66W. A STATIONARY FRONT PASSES THROUGH 32N73W TO 30N76W AND 29N78W. THE STATIONARY FRONT IS DISSIPATING FROM 29N78W TO 26N79W...BETWEEN THE NORTHERN BAHAMAS AND FLORIDA. HIGH CLOUDS ARE TO THE WEST OF THE LINE THAT PASSES THROUGH 32N64W 28N67W 24N69W...AND TO THE NORTH OF 24N BETWEEN 69W AND FLORIDA. A SURFACE RIDGE PASSES THROUGH 32N62W TO 28N64W TO 23N64W...AND TO 17N64W IN THE EASTERN CARIBBEAN SEA. A MIDDLE LEVEL TO UPPER LEVEL TROUGH EXTENDS FROM A 28N38W CYCLONIC CIRCULATION CENTER TO 20N50W...TO A SECOND CYCLONIC CIRCULATION CENTER THAT IS NEAR 20N60W...INTO THE EASTERN CARIBBEAN SEA NEAR 14N65W AND 13N66W. A SURFACE TROUGH EXTENDS FROM A 1010 MB LOW PRESSURE CENTER THAT IS NEAR 27N40W...TO 28N38W 26N36W 23N38W 20N42W 19N45W. SCATTERED MODERATE TO STRONG CONVECTIVE PRECIPITATION IS FROM 27N TO 32N BETWEEN 33W AND 41W. RAINSHOWERS ARE POSSIBLE WITHIN 60 NM TO 120 NM ON EITHER SIDE OF 26N34W 22N37W 20N46W 21N55W 26N58W 30N59W...AND TO THE NORTH OF 30N BETWEEN 54W AND 63W. AN EASTERN ATLANTIC OCEAN SURFACE RIDGE EXTENDS FROM A 1017 MB HIGH PRESSURE CENTER THAT IS NEAR 26N25W TO 16N27W TO 10N29W. PLEASE READ THE HIGH SEAS FORECAST...MIAHSFAT2... FOR MORE DETAILS ABOUT THE 1010 MB LOW PRESSURE CENTER THAT IS NEAR 27N40W. EXPECT 20 TO 25 KNOT NORTHEASTERLY WINDS AND 10 TO 14 FOOT SEA HEIGHTS TO THE NORTH OF THE LINE 31N36W 26N50W. EXPECT ALSO WIND SPEEDS 20 KNOTS OR LESS AND 10 FOOT SEA HEIGHTS TO THE NORTH OF 23N TO THE EAST OF 54W. A WEAKENING STATIONARY FRONT IS ALONG 31N75W 26N79W. EXPECT 20 TO 25 KNOT NORTHEASTERLY WINDS AND SEA HEIGHTS RANGING FROM 8 TO 11 FEET. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ MT