[Tropical] Tropical Weather Discussion

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AXNT20 KNHC 061141
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT SAT APR 06 2013

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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 1015 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH PASSES THROUGH COASTAL SIERRA LEONE NEAR
7N13W TO 3N16W. THE ITCZ CONTINUES FROM 3N16W..REACHING THE
EQUATOR ALONG 23W...REMAINING ALONG THE EQUATOR BETWEEN 23W AND
29W...AND CONTINUING TO 3S39W. CONVECTIVE PRECIPITATION...
SCATTERED MODERATE TO STRONG TO THE SOUTH OF 2N18W 4N24W 4N37W
3N40W. ISOLATED MODERATE TO LOCALLY STRONG ELSEWHERE TO THE
SOUTH OF 6N TO THE EAST OF 50W.

...DISCUSSION...

FROM THE WESTERN ATLANTIC OCEAN INTO THE EASTERN
GULF OF MEXICO...AND INTO THE WESTERN CARIBBEAN SEA...

A MIDDLE LEVEL TO UPPER LEVEL TROUGH PASSES THROUGH 32N76W TO
25N80W...INTO THE NORTHWESTERN CARIBBEAN SEA NEAR 20N84W...TO
SOUTHERN GUATEMALA. THE TROUGH SUPPORTS A COLD FRONT THAT
EXTENDS FROM A 1011 MB LOW PRESSURE CENTER THAT IS NEAR 31N72W
TO A 1010 MB LOW PRESSURE CENTER THAT IS NEAR 27N78W IN THE
NORTHERN BAHAMAS...CROSSING CUBA NEAR 23N81W... TO EASTERN
HONDURAS NEAR 15N85W. CONVECTIVE PRECIPITATION...BROKEN TO
OVERCAST MULTILAYERED CLOUDS AND SCATTERED MODERATE TO ISOLATED
STRONG TO THE NORTH OF 20N BETWEEN 63W AND 79W. BROKEN TO
OVERCAST MULTILAYERED CLOUDS AND POSSIBLE RAINSHOWERS WITHIN 60
NM TO 120 NM ON EITHER SIDE OF 22N77W IN CUBA TO 17N80W...TO
15N83W NEAR THE BORDER OF EASTERN HONDURAS AND NORTHEASTERN
NICARAGUA...TO 11N90W OFF THE COAST OF NICARAGUA IN THE EASTERN
PACIFIC OCEAN. MIDDLE LEVEL TO UPPER LEVEL NORTHWESTERLY WIND
FLOW COVERS THE GULF OF MEXICO ON THE WESTERN SIDE OF THE TROUGH.

THE REST OF THE GULF OF MEXICO...

SCATTERED HIGH CLOUDS ARE MOVING FROM TEXAS AND MEXICO TOWARD
THE EAST AND SOUTHEAST...WITH THE MIDDLE LEVEL TO UPPER LEVEL
NORTHWESTERLY WIND FLOW. THE CLOUDS ARE IN THE GULF OF MEXICO TO
THE NORTH OF 21N TO THE WEST OF 90W. SCATTERED TO BROKEN LOW
CLOUDS ARE IN THE LOWER VALLEY OF TEXAS. SCATTERED LOW CLOUDS
COVER THE MIDDLE TEXAS COASTAL PLAINS. THE HOUSTON METROPOLITAN
AREA IS REPORTING A HIGH CLOUD CEILING.

FAIR SKIES COVER THE REST OF THE GULF COASTAL PLAINS OF THE
U.S.A. FROM THE UPPER TEXAS GULF COAST EASTWARD TO BROOKSVILLE
FLORIDA. LOW CLOUD CEILINGS ARE REPORTED FROM THE TAMPA
METROPOLITAN AREA SOUTHWARD.

FOR THE OFFSHORE OIL PLATFORM SITES THAT ARE TO THE NORTH OF 27N
TO THE WEST OF 88W...

THE TEXAS COASTAL REPORTS...ICAO STATION KMZG
SCATTERED LOW CLOUDS AT 2300 FEET...ICAO STATION KBBF LOW CLOUD
CEILING AT 2200 FEET. ICAO STATION KGBK IS REPORTING A LOW CLOUD
CEILING AT 3200 FEET. ICAO STATION KIPN AND ICAO STATION KMDJ
REPORT A LOW CLOUD CEILING AT 4100 FEET. ICAO STATION KMYT
REPORTS A LOW CLOUD CEILING AT 4200 FEET. ICAO STATION KHQI
REPORTS A LOW CLOUD CEILING AT 2800 FEET. NO OTHER CLOUDS SHOW
UP IN THE OBSERVATIONS.

THE REST OF THE CARIBBEAN SEA...

A MIDDLE LEVEL TO UPPER LEVEL RIDGE IS ALONG 11N70W IN
NORTHWESTERN VENEZUELA...THROUGH THE CARIBBEAN SEA...TO 21N68W
IN THE ATLANTIC OCEAN...BEYOND 32N55W.

THE MONSOON TROUGH EXTENDS FROM 7N73W IN COLOMBIA... THROUGH THE
COLOMBIA/PANAMA BORDER THAT IS NEAR 8N77W...BEYOND 8N82W IN
PANAMA...INTO THE EASTERN PACIFIC OCEAN. CONVECTIVE
PRECIPITATION...WIDELY SCATTERED MODERATE TO ISOLATED STRONG IN
COLOMBIA TO THE NORTH OF 5N TO THE WEST OF 73W.

RAINSHOWERS ARE POSSIBLE ELSEWHERE TO THE NORTHEAST OF 16N72W
14N67W 11N62W IN BROAD SURFACE SOUTHEASTERLY WIND FLOW.

THE REST OF THE ATLANTIC OCEAN...

A SURFACE RIDGE EXTENDS FROM A 1031 MB HIGH PRESSURE CENTER THAT
IS NEAR 37N42W...THROUGH 32N48W TO 27N57W 24N69W...TO 23N75W IN
THE BAHAMAS.

ONE SURFACE TROUGH IS ALONG 64W/65W...FROM 15N IN THE CARIBBEAN
SEA TO 21N IN THE ATLANTIC OCEAN. RAINSHOWERS ARE POSSIBLE FROM
16N TO 25N BETWEEN 60W AND 66W. RAINSHOWERS ARE POSSIBLE ALSO
FROM 20N TO 23N IN THE ATLANTIC OCEAN BETWEEN 67W AND 71W. THIS
CLOUDINESS REMAINS FROM A TROUGH FROM SIX HOURS AGO.

A MIDDLE LEVEL TO UPPER LEVEL TROUGH PASSES THROUGH 32N30W TO
26N32W 21N34W 14N50W. THE TROUGH SUPPORTS A COLD FRONT THAT
PASSES THROUGH 32N32W TO 30N35W AND 29N41W. RAINSHOWERS ARE
POSSIBLE TO THE NORTHWEST AND NORTH OF THE LINE THAT PASSES
THROUGH 32N23W TO 27N31W TO 26N40W AND 25N51W.

A SURFACE RIDGE PASSES THROUGH 32N20W TO 29N30W AND 27N40W.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
MT

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