000
AXNT20 KNHC 010520
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
105 AM EST TUE JAN 01 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 0515 UTC.

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

THE MONSOON TROUGH CURRENTLY REMAINS SOUTH OF NW AFRICA 
EXTENDING FROM THE PRIME MERIDIAN AND 4N TO 3N12W. THE ITCZ 
BEGINS AT 3N12W AND CONTINUES TO 5N20W TO 3N30W TO THE COAST OF 
BRAZIL AT EQ50W. WIDELY SCATTERED MODERATE CONVECTION IS FROM 
EQ-9N BETWEEN 18W-38W.

...DISCUSSION...

GULF OF MEXICO...
A 1027 MB HIGH IS CENTERED OVER THE W ATLANTIC NEAR 30N72W. 
10-20 KT SE WINDS ARE OVER THE GULF OF MEXICO. BROKEN TO 
OVERCAST LOW CLOUDS WITH SCATTERED SHOWERS ARE OVER THE W GULF W 
OF 95W. A COLD FRONT IS ABOUT 90 NW INLAND OVER S TEXAS WITH 
ISOLATED THUNDERSTORMS AND NUMEROUS SHOWERS. THE REMAINDER OF 
THE GULF HAS FAIR WEATHER. IN THE UPPER LEVELS... AN UPPER LEVEL 
RIDGE IS OVER THE GULF WITH AXIS ALONG 80W. UPPER LEVEL MOISTURE 
AND BROKEN HIGH CLOUDS ARE OVER THE NW GULF. STRONG SUBSIDENCE 
IS OVER THE REMAINDER OF THE GULF. EXPECT IN 24 HOURS FOR THE  
COLD FRONT TO EXTEND FROM THE MOUTH OF THE MISSISSIPPI RIVER TO 
TAMPICO MEXICO WITH CONVECTION. 

CARIBBEAN SEA...
15-30 KT TRADEWINDS ARE OVER THE CARIBBEAN WITH STRONGEST WINDS 
ALONG THE COAST OF N COLOMBIA.. SCATTERED SHOWERS ARE INLAND 
OVER MOST OF CENTRAL AMERICA FROM PANAMA TO BELIZE. MORE SHOWERS 
ARE OVER THE WINDWARD ISLANDS...LEEWARD ISLANDS...PUERTO 
RICO...HISPANIOLA...AND CUBA. IN THE UPPER LEVELS...AN UPPER 
LEVEL HIGH IS CENTERED OVER JAMAICA NEAR 18N77W. STRONG 
SUBSIDENCE IS OVER THE CARIBBEAN. EXPECT OVER THE NEXT 24 HOURS 
FOR MORE SHOWERS TO BE OVER THE SW CARIBBEAN. 

ATLANTIC OCEAN...
A 1027 MB HIGH IS CENTERED OVER THE W ATLANTIC NEAR 30N72W. A 
COLD FRONT IS OVER THE CENTRAL ATLANTIC FROM 32N44W TO 26N50W TO 
21N60W TO N OF PUERTO RICO AT 20N66W. WIDELY SCATTERED MODERATE 
CONVECTION IS N OF 28N BETWEEN 41W-45W. SCATTERED SHOWERS ARE 
WITHIN 60 NM NW OF THE REMAINDER OF THE FRONT. BROKEN TO 
OVERCAST COLD AIR STRATOCUMULUS CLOUDS ARE W OF THE FRONT TO 
70W. A PREFRONTAL SURFACE TROUGH IS OVER THE CENTRAL ATLANTIC 
FROM 30N43W TO 24N49W. A 1029 MB HIGH IS OVER THE E ATLANTIC 
NEAR 33N22W. IN THE UPPER LEVELS...AN UPPER LEVEL TROUGH IS OVER 
THE CENTRAL ATLANTIC N OF 10N BETWEEN 25W-60W WITH AN EMBEDDED 
UPPER LEVEL LOW AT 27N31W. EXPECT IN 24 HOURS FOR THE COLD FRONT 
TO EXTEND FROM 32N35W TO 22N47W WITH SHOWERS. 

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

$$
FORMOSA