000
AXNT20 KNHC 230611 CCA
TWDAT 

TROPICAL WEATHER DISCUSSION...COR
NWS NATIONAL HURRICANE CENTER MIAMI FL  
105 AM EST WED NOV 23 2011 

CORRECTION TO THE MONSOON TROUGH/ITCZ SECTION

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 GUINEA BISSAU AND SENEGAL NEAR 
12N17W TO 10N19W. THE ITCZ CONTINUES FROM 10N19W TO 6N23W AND 
5N42W. ISOLATED MODERATE TO LOCALLY STRONG RAINSHOWERS ARE TO 
THE SOUTH OF 13N TO THE EAST OF 43W. ONE SURFACE TROUGH IS ALONG 
43W/44W FROM 4N TO 12N. ISOLATED MODERATE RAINSHOWERS ARE TO THE 
SOUTH OF 13N BETWEEN 38W AND 45W. A SECOND SURFACE TROUGH IS 
ALONG 54W/55W FROM 12N TO COASTAL SURINAME. RAINSHOWERS ARE IN 
AN ARC FROM 8N TO 12N BETWEEN 48W AND 57W.

...DISCUSSION...

THE GULF OF MEXICO...

AN UPPER LEVEL TROUGH THAT IS MOVING THROUGH THE EASTERN HALF OF 
THE CONTINENTAL U.S.A. SUPPORTS A COLD FRONT THAT PASSES THROUGH 
SOUTH CENTRAL COASTAL LOUISIANA TO 26N96W AND 23N98W IN EAST 
CENTRAL COASTAL MEXICO. SCATTERED MODERATE RAINSHOWERS ARE 
WITHIN 30 NM ON EITHER SIDE OF 28N92W TO 30N88W IN SOUTHWESTERN 
COASTAL ALABAMA. A SURFACE RIDGE EXTENDS FROM AN ATLANTIC OCEAN
1022 MB HIGH PRESSURE CENTER THAT IS NEAR 30N71W...ACROSS THE 
NORTHERN BAHAMAS AND SOUTH FLORIDA TO 24N94W IN THE WEST CENTRAL 
GULF OF MEXICO.

THE CARIBBEAN SEA...
A MIDDLE LEVEL TO UPPER LEVEL SHEAR AXIS PASSES THROUGH 20N60W 
TO PUERTO RICO AND THE MONA PASSAGE TO 17N72W. A MIDDLE LEVEL TO 
UPPER LEVEL CYCLONIC CIRCULATION CENTER IS NEAR 14N77W. CYCLONIC
FLOW COVERS THE AREA SOUTH OF 17N BETWEEN 72W AND CENTRAL 
AMERICA. A SURFACE TROUGH IS ALONG 74W/75W FROM NORTHERN 
COLOMBIA TO 16N. RAINSHOWERS ARE POSSIBLE TO THE EAST AND 
SOUTHEAST OF THE LINE THAT PASSES THROUGH THE MONA PASSAGE TO 
16N77W TO SOUTHEASTERN COASTAL NICARAGUA. LARGE-SCALE 
NORTHEASTERLY SURFACE WIND FLOW IS TO THE EAST AND SOUTHEAST
OF THE MONA PASSAGE-TO-NICARAGUA LINE...PUSHING LOW CLOUDS AND
POSSIBLE PRECIPITATION SOUTHWESTWARD. THE MONSOON TROUGH IS 
ALONG 9N/10N BETWEEN 75W AND ACROSS NORTHERN COSTA RICA.

THE ATLANTIC OCEAN...

A MIDDLE LEVEL TO UPPER LEVEL TROUGH EXTENDS FROM A 33N42W
CYCLONIC CIRCULATION CENTER TO 26N45W AND 22N53W TO 20N60W.
A 1005 MB LOW PRESSURE CENTER THAT IS NEAR 32N44W IS SURROUNDED 
BY GALE-FORCE WINDS TO THE NORTH OF 30N BETWEEN 39W AND 52W. 
A COLD FRONT EVENTUALLY PASSES THROUGH 32N41W TO 27N44W AND 
22N49W. A SURFACE TROUGH CONTINUES FROM 22N49W TO 19N52W AND
16N54W. BROKEN TO OVERCAST MULTILAYERED CLOUDS AND ISOLATED 
MODERATE PRECIPITATION ARE WITHIN 120 NM ON EITHER SIDE OF THE 
LINE THAT PASSES THROUGH 32N37W TO 28N38W TO 20N47W. ISOLATED 
MODERATE RAINSHOWERS ALSO ARE WITHIN 15 TO 30 NM ON EITHER SIDE
OF 20N46W 17N54W TO 15N60W.  MIDDLE LEVEL TO UPPER LEVEL 
NORTHERLY WIND FLOW COVERS THE ENTIRE AREA THAT IS TO THE WEST 
OF THE MIDDLE LEVEL TO UPPER LEVEL TROUGH AND COLD FRONT/SURFACE 
TROUGH. SURFACE ANTICYCLONIC WIND FLOW MOVES AROUND A 1022 MB 
HIGH PRESSURE CENTER THAT IS NEAR 30N71W. A SURFACE RIDGE 
EXTENDS FROM THE 30N71W CENTER...ACROSS THE NORTHERN BAHAMAS AND 
SOUTH FLORIDA TO 24N94W IN THE WEST CENTRAL GULF OF MEXICO.
A 1022 MB HIGH PRESSURE CENTER IS NEAR 31N76W. BROAD SURFACE 
ANTICYCLONIC WIND FLOW COVERS THE ATLANTIC OCEAN TO THE WEST OF 
THE TROUGH AND FRONTAL BOUNDARY. BROAD SURFACE ANTICYCLONIC WIND 
FLOW ALSO COVERS THE ATLANTIC OCEAN TO THE NORTH OF 15N BETWEEN 
AFRICA AND THE FRONTAL BOUNDARY. AN UPPER LEVEL TROUGH PASSES 
THROUGH 32N8W...ACROSS CENTRAL MAURITANIA TO 9N22W. NO 
SIGNIFICANT DEEP CONVECTIVE PRECIPITATION IS APPARENT BASED 
SOLELY ON SATELLITE DATA.

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

$$
MT