[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 300530
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
105 AM EST SUN DEC 30 2012

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.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 8N13W TO
7N16W. THE INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM
7N16W TO 4N20W TO 3N40W TO THE EQUATOR NEAR 47W. WIDELY
SCATTERED MODERATE CONVECTION IS FROM 2N-6N BETWEEN 13W-20W...
AND FROM EQ-10N BETWEEN 20W-43W.

...DISCUSSION...

GULF OF MEXICO...
A COLD FRONT EXTENDS FROM S FLORIDA NEAR 27N80W TO THE N COAST
OF THE YUCATAN PENINSULA AT 21N90W TO THE SOUTHERN BAY OF
CAMPECHE AT 19N93W. 20-25 KT NW WINDS ARE OVER MOST OF THE GULF
N OF THE FRONT. BROKEN TO OVERCAST LOW CLOUDS ARE OVER THE SW
GULF S OF 25N W OF 92W. IN THE UPPER LEVELS...AN UPPER LEVEL
HIGH CENTERED OVER THE CARIBBEAN SEA IS PRODUCING SW UPPER LEVEL
FLOW OVER THE GULF. UPPER LEVEL MOISTURE AND BROKEN HIGH CLOUDS
ARE OVER THE NW GULF N OF 25N W OF 88W. STRONG SUBSIDENCE IS
OVER THE S GULF S OF 25N. EXPECT THE COLD FRONT TO BE OUT OF THE
GULF WITHIN 6 HOURS. ALSO EXPECT SCATTERED SHOWERS OVER THE
SOUTHERN BAY OF CAMPECHE WITHIN THE NEXT 24 HOURS.

CARIBBEAN SEA...
15-25 KT TRADEWINDS ARE OVER THE CARIBBEAN WITH STRONGEST WINDS
OVER THE CENTRAL CARIBBEAN S OF JAMAICA. SCATTERED SHOWERS ARE
INLAND OVER CENTRAL AMERICA N OF COSTA RICA. MORE SHOWERS ARE
OVER THE E CARIBBEAN E OF 68W. IN THE UPPER LEVELS...AN UPPER
LEVEL HIGH IS CENTERED OVER THE CAYMAN ISLANDS NEAR 19N81W.
STRONG SUBSIDENCE IS OVER MOST OF THE CARIBBEAN EXCEPT OVER THE
SW CARIBBEAN S OF 12N. EXPECT IN 24 HOURS FOR A DISSIPATING COLD
FRONT TO BE OVER CENTRAL CUBA.

ATLANTIC OCEAN...
A COLD FRONT IS OVER THE W ATLANTIC FROM 32N73W TO S FLORIDA
NEAR 27N80W. SCATTERED SHOWERS ARE WITHIN 30 NM OF THE FRONT N
OF 28N. A 1022 MB HIGH IS OVER THE CENTRAL ATLANTIC NEAR
29N50W PRODUCING FAIR WEATHER. A 1018 MB LOW IS ALSO CENTERED
OVER THE CENTRAL ATLANTIC NEAR 23N43W. A SURFACE TROUGH EXTENDS
N FROM THE LOW TO 32N40W. IN THE UPPER LEVELS...AN UPPER LEVEL
LOW IS OVER THE CENTRAL ATLANTIC NEAR 23N35W ENHANCING SHOWERS
OVER THE CENTRAL ATLANTIC FROM 20N-30N BETWEEN 32W-40W. EXPECT
IN 24 HOURS FOR A COLD FRONT TO EXTEND FROM 32N58W TO CENTRAL
CUBA WITH SHOWERS.

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

$$
FORMOSA




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