000
AXNT20 KNHC 271041
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
805 AM EDT THU MAY 27 2010

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...METEOROLOGICAL ANALYSIS...WEATHER 
OBSERVATIONS...AND RADAR.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 1015 UTC...

...TROPICAL WAVES...

AN ATLANTIC OCEAN TROPICAL WAVE IS ALONG 21W/22W TO THE SOUTH
OF 9N MOVING WESTWARD 10 KT. THIS WAVE IS NOT EASY TO DISCERN
IN THE SATELLITE IMAGERY. ANY NEARBY PRECIPITATION IS PART OF 
THE ITCZ PRECIPITATION.

AN ATLANTIC OCEAN TROPICAL WAVE IS ALONG 36W...BASED ON THE LAST 
VISIBLE IMAGES OF THE DAY YESTERDAY. ANY NEARBY PRECIPITATION IS 
PART OF THE ITCZ PRECIPITATION.

AN ATLANTIC OCEAN TROPICAL WAVE IS ALONG 48W/49W TO THE SOUTH OF 
10N MOVING WESTWARD 10 KT. THIS WAVE IS NOT EASY TO DISCERN IN 
THE SATELLITE IMAGERY. ANY NEARBY PRECIPITATION IS PART OF THE 
ITCZ PRECIPITATION. 

A CARIBBEAN SEA TROPICAL WAVE IS ALONG ALONG 69W TO THE SOUTH
OF 13N INTO VENEZUELA AND COLOMBIA...MOVING WESTWARD 10 KT. 
STRONG SHOWERS AND THUNDERSTORMS ARE IN COLOMBIA AND VENEZUELA 
FROM 5N TO 10N BETWEEN 69W AND 71W.
 
...THE ITCZ...

FROM THE SIERRA LEONE COAST NEAR 7N12W TO 4N26W TO 4N40W...
TO THE BRAZIL/FRENCH GUIANA BORDER NEAR 5N52W...TO 5N60W NEAR 
THE BORDERS OF VENEZUELA...GUYANA...AND BRAZIL. WIDELY SCATTERED
MODERATE SHOWERS TO LOCALLY STRONG THUNDERSTORMS ARE WITHIN
120 NM ON EITHER SIDE OF 4N18W 4N30W 3N33W 6N43W 6N50W 8N54W
10N60W.

...DISCUSSION...

THE GULF OF MEXICO...
MIDDLE LEVEL TO UPPER LEVEL NORTHWESTERLY WIND FLOW MOVES ACROSS 
THE GULF OF MEXICO. THE SURFACE PRESSURE PATTERN IS WEAK. 
SURFACE ANTICYCLONIC FLOW IN THE NORTHWESTERN CORNER OF THE AREA 
MOVES AROUND A 1015 MB HIGH PRESSURE CENTER THAT IS NEAR 27N95W.

THE CARIBBEAN SEA...
UPPER LEVEL ANTICYCLONIC FLOW MOVES FROM THE PART OF THE EASTERN 
PACIFIC OCEAN THAT IS TO THE SOUTH OF MEXICO AND CENTRAL AMERICA 
BETWEEN 80W AND 105W...INTO THE GULF OF MEXICO TO THE SOUTH OF 
23N...THROUGH THE YUCATAN CHANNEL...TOWARD THE BASE OF THE 
32N74W 13N73W MIDDLE LEVEL TO UPPER LEVEL TROUGH. ISOLATED 
MODERATE SHOWERS ARE BETWEEN 70W AND 82W. A SURFACE TROUGH
GOES FROM CENTRAL CUBA TO 18N82W TO HONDURAS NEAR 15N85W.
A CARIBBEAN SEA TROPICAL WAVE IS ALONG ALONG 69W/68W TO
THE SOUTH OF 13N INTO VENEZUELA AND THE VENEZUELA/COLOMBIA 
BORDER...MOVING WESTWARD 10 KT. STRONG SHOWERS AND THUNDERSTORMS
ARE IN COLOMBIA AND VENEZUELA FROM 5N TO 10N BETWEEN 69W AND 71W.

THE ATLANTIC OCEAN...
DEEP LAYER CYCLONIC FLOW COVERS THE AREAS FROM THE WESTERN 
ATLANTIC OCEAN...OVER THE BAHAMAS...INTO THE SOUTHERN CARIBBEAN 
SEA. A MIDDLE LEVEL TO UPPER LEVEL TROUGH EXTENDS FROM
A CYCLONIC CIRCULATION CENTER THAT IS NEAR 32N74W...ACROSS THE 
SOUTHERN BAHAMAS AND HISPANIOLA...INTO THE CARIBBEAN SEA TO 
13N73W. ISOLATED MODERATE SHOWERS ARE TO THE NORTH OF 27N 
BETWEEN 70W AND 80W. A SURFACE TROUGH GOES FROM A 1004 MB LOW 
PRESSURE CENTER THAT IS NEAR 30N75W...TO THE NORTHERN BAHAMAS 
NEAR 27N78W...TO SOUTH FLORIDA NEAR 26N82W...AND JUST TO THE 
EAST OF THE BAHAMAS FROM 23N TO 24N BETWEEN 72W AND 73W.
AN UPPER LEVEL TROUGH GOES FROM A CYCLONIC CIRCULATION CENTER 
THAT IS MOVING ACROSS THE MADEIRA ARCHIPELAGO TO 24N25W.
NO PRECIPITATION IS DISCERNIBLE WITH THIS TROUGH. BROAD SURFACE
ANTICYCLONIC FLOW COVERS THE AREA TO THE NORTH OF 10N BETWEEN 
AFRICA AND 60W. THIS FLOW MOVES AROUND A 1022 MB HIGH PRESSURE 
CENTER THAT IS NEAR 30N25W.

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

$$
MT