000
AXNT20 KNHC 270604
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL  
205 AM EDT FRI MAY 27 2011

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...

FROM THE BORDER OF GUINEA AND SIERRA LEONE NEAR 9N13W TO 6N20W 
5N27W 1N38W...INTO EXTREME NORTHEASTERN BRAZIL...SOUTHERN FRENCH 
GUIANA...AND SOUTHEASTERN SURINAME NEAR 3N55W. NUMEROUS STRONG 
RAINSHOWERS AND THUNDERSTORMS ARE FROM 5N TO 7N BETWEEN 12W AND 
15W...FROM 1S TO 1N BETWEEN 38W AND 45W...AND IN THE COASTAL 
WATERS FROM BRAZIL TO SURINAME FROM 1N TO 6N BETWEEN 48W AND 
53W. SCATTERED MODERATE RAINSHOWERS TO ISOLATED STRONG 
THUNDERSTORMS ARE FROM 3N TO 6N BETWEEN 17W AND 22W...AND
FROM 1N TO 4N BETWEEN 31W AND 33W.
 
...DISCUSSION...

THE GULF OF MEXICO...

AN UPPER LEVEL TROUGH IS PUSHING ITSELF THROUGH THE EASTERN HALF 
OF THE GULF OF MEXICO. RAINSHOWERS COVER PARTS OF THE FLORIDA 
PANHANDLE AND COASTAL WATERS FROM 29N BEYOND 32N BETWEEN
WESTERN GEORGIA AND 87W. A BROAD SURFACE RIDGE CUTS ACROSS THE 
NORTHERN HALF OF THE AREA.
 
THE CARIBBEAN SEA...

BROAD UPPER LEVEL FLOW COVERS THE AREA TO THE NORTHWEST OF THE 
LINE THAT RUNS FROM THE WINDWARD PASSAGE TO NORTHEASTERN 
NICARAGUA. UPPER LEVEL ANTICYCLONIC FLOW COVERS THE REST OF THE 
CARIBBEAN SEA...AWAY FROM THE TROUGH. BROAD SURFACE CYCLONIC 
FLOW COVERS THE SOUTHWESTERN CORNER OF THE AREA. RAINSHOWERS AND 
THUNDERSTORMS REMAIN IN NORTHWESTERN VENEZUELA AND PARTS OF 
NORTHERN COLOMBIA.

THE ATLANTIC OCEAN...

AN UPPER LEVEL CYCLONIC CIRCULATION CENTER IS NEAR 32N48W.
BROAD CYCLONIC FLOW COVERS THE AREA THAT IS TO THE NORTH OF 25N 
BETWEEN 40W AND 55W. BROAD UPPER LEVEL ANTICYCLONIC FLOW SPANS
THE ATLANTIC OCEAN AND THE CARIBBEAN SEA FROM 10N TO 32N BETWEEN 
40W AND 80W. A 1016 MB LOW PRESSURE CENTER IS NEAR 28N50W. 
A SURFACE TROUGH TRAILS FROM THE LOW CENTER TO 24N64W.
A SHEAR AXIS CONTINUES FROM 20N55W TO 19N64W INTO THE 
NORTHWESTERN PART OF THE DOMINICAN REPUBLIC. ISOLATED MODERATE 
RAINSHOWERS ARE FROM 15N TO 20N BETWEEN 57W AND 65W.
AN UPPER LEVEL CYCLONIC CIRCULATION CENTER IS ON TOP OF THE
MADEIRA ARCHIPELAGO. BROAD UPPER LEVEL CYCLONIC FLOW IS TO THE 
NORTH OF 23N TO THE EAST OF 37W. A SURFACE TROUGH EXTENDS FROM
A 1012 MB LOW CENTER THAT ALSO IS ON TOP OF THE MADEIRA 
ISLANDS...TO THE WESTERN CANARY ISLANDS AND 27N21W. IT IS NOT 
EASY TO DISCERN ANY DEEP CONVECTIVE PRECIPITATION BASED SOLELY 
ON SATELLITE IMAGERY. A SURFACE RIDGE IS ALONG 35W...BETWEEN
THE MADEIRA ARCHIPELAGO CYCLONIC CENTER AND THE FLOW THAT MOVES
AROUND THE 1016 MB LOW CENTER THAT IS NEAR 28N50W.

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

$$
MT