000
AXNT20 KNHC 110551
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL  
205 AM EDT SAT JUN 11 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.

...TROPICAL WAVES...

AN ATLANTIC OCEAN TROPICAL WAVE IS ALONG 34W/35W TO THE SOUTH
OF 10N MOVING WEST 10 TO 15 KT. ISOLATED MODERATE RAINSHOWERS
ARE IN THE ITCZ.

AN ATLANTIC OCEAN TROPICAL WAVE IS ALONG 13N43W 9N45W 5N47W 
MOVING WEST 10 TO 15 KT. SCATTERED STRONG RAINSHOWERS AND
THUNDERSTORMS ARE FROM 8N TO 12N BETWEEN 42W AND 43W.

...THE ITCZ/THE MONSOON TROUGH...

THE MONSOON TROUGH PASSES THROUGH THE PRIME MERIDIAN ALONG 16N 
TO 14N10W 12N16W 7N20W. THE ITCZ CONTINUES ALONG 7N20W 4N27W
6N35W 9N44W...INTO THE NORTHERN BORDER OF FRENCH GUIANA AND 
SURINAME. STRONG RAINSHOWERS AND THUNDERSTORMS ARE FROM 3N
TO 4N BETWEEN 14W AND 17W...AND FROM 5N TO 6N BETWEEN 23W AND
26W. DISORGANIZED ISOLATED MODERATE RAINSHOWERS ARE ELSEWHERE
TO THE SOUTH OF 10N BETWEEN AFRICA AND SOUTH AMERICA.

...DISCUSSION...

THE GULF OF MEXICO...
BROAD UPPER LEVEL CYCLONIC FLOW COVERS THE ENTIRE GULF OF 
MEXICO...THANKS TO A CYCLONIC CIRCULATION CENTER THAT IS NEAR 
27N85W. THIS CENTER HAS BEEN NEARLY STATIONARY DURING THE LAST 
24 HOURS. THE PERIPHERY OF THE CYCLONIC FLOW PASSES THROUGH THE 
PACIFIC OCEAN SIDE OF MEXICO. RAINSHOWERS AND ISOLATE 
THUNDERSTORMS HAVE DEVELOPED/DISSIPATED/AND DEVELOPED AGAIN
LATER IN THE PERIPHERAL CYCLONIC FLOW THAT IS MOVING AROUND
THE 27N85W CYCLONIC CENTER...FROM THE STRAITS OF FLORIDA AND
CURVING NORTHWESTWARD THROUGH MEXICO TO 21N103W.

FROM THE ATLANTIC OCEAN THAT IS TO THE WEST OF 65W INTO THE 
NORTHWESTERN CARIBBEAN SEA...

A SURFACE TROUGH GOES FROM 29N73W TO A 1010 MB LOW PRESSURE 
CENTER THAT IS NEAR 26N78W...JUST TO THE NORTH OF ANDROS 
ISLAND...ACROSS WESTERN CUBA TO 18N85W. STRONG RAINSHOWERS AND 
THUNDERSTORMS ARE IN INDIVIDUAL CLUSTERS COVERING CUBA AND 
SURROUNDING WATERS AND THE BAHAMAS FROM 20N TO 29N BETWEEN
68W AND 77W...AND IN HONDURAS. 

THE REST OF THE ATLANTIC OCEAN...
THE WELL-DEFINED CYCLONIC FLOW IN THE GULF OF MEXICO IS ENHANCING
THE UPPER LEVEL RIDGE THAT PASSES THROUGH 35N71W TO 28N69W TO
20N69W. UPPER LEVEL ANTICYCLONIC FLOW THAT IS MOVING AROUND THE
RIDGE COVERS THE ATLANTIC OCEAN TO THE WEST OF 60W. AN UPPER 
LEVEL TROUGH PASSES THROUGH 33N43W TO 28N48W TO 16N52W. 
A SURFACE TROUGH PASSES THROUGH 31N40W TO 25N48W TO A 1016 MB
LOW PRESSURE CENTER THAT IS NEAR 23N57W. ISOLATED MODERATE 
RAINSHOWERS ARE WITHIN 60 NM ON EITHER SIDE OF 32N40W 25N45W
20N49W...AND FROM 20N TO 25N BETWEEN 50W AND 57W. SURFACE 
ANTICYCLONIC WIND FLOW IS WITHIN 240 NM ON EITHER SIDE OF
A RIDGE THAT EXTENDS FROM 34N73W TO A 1020 MB HIGH CENTER THAT
IS NEAR 30N67W TO 28N52W. SURFACE ANTICYCLONIC WIND FLOW COVERS
THE ATLANTIC OCEAN TO THE EAST OF THE 31N40W 23N57W SURFACE 
TROUGH. THIS ANTICYCLONIC FLOW MOVES AROUND A RIDGE THAT PASSES 
THROUGH A 1027 MB HIGH PRESSURE CENTER THAT IS NEAR 34N25W TO 
28N29W AND 19N40W.

F0R ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
MT