[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 082324
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
705 PM EST SAT DEC 08 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 2315 UTC.

...ITCZ/MONSOON TROUGH...
THE ITCZ EXTENDS FROM THE COAST OF LIBERIA AT 6N10W TO 4N30W TO
7N42W TO THE COAST OF SURINAME AT 5N52W. WIDELY SCATTERED
MODERATE CONVECTION IS FROM 1N-6N BETWEEN 25W-34W...AND FROM
1N-8N BETWEEN 34W-44W.

...DISCUSSION...

THE GULF OF MEXICO...
SURFACE RIDGING EXTENDS FROM N FLORIDA TO E TEXAS. RESIDUAL
SCATTERED SHOWERS ARE NOTED ON RADAR IMAGERY OVER S FLORIDA AND
THE STRAITS OF FLORIDA FROM 24N-28N BETWEEN 80W-84W. THE
REMAINDER OF THE GULF OF MEXICO HAS MOSTLY FAIR WEATHER. IN THE
UPPER LEVELS...AN UPPER RIDGE IS OVER THE GULF WITH AXIS ALONG
90W. SIGNIFICANT UPPER LEVEL MOISTURE WITH BROKEN HIGH CLOUDS
COVERS MOST OF THE GULF. EXPECT SCATTERED SHOWERS TO LINGER OVER
S FLORIDA AND THE STRAITS OF FLORIDA FOR THE NEXT 24 HOURS. ALSO
EXPECT SCATTERED SHOWERS TO BE ALONG THE COAST OF TEXAS IN 24
HOURS DUE TO RETURN SURFACE FLOW.

THE CARIBBEAN SEA...
15-25 KT TRADEWINDS ARE OVER THE E CARIBBEAN SEA E OF 80W WITH
STRONGEST WINDS OVER THE CENTRAL CARIBBEAN. A SURFACE TROUGH IS
OVER THE W CARIBBEAN FROM THE CAYMAN ISLANDS AT 19N80W TO THE
COAST OF NICARAGUA AT 13N83W. BROKEN LOW CLOUDS WITH SCATTERED
SHOWERS ARE WITHIN 60 NM OF THE TROUGH AXIS. ELSEWHERE...
SCATTERED SHOWERS ARE OVER THE SW CARIBBEAN...PANAMA...AND COSTA
RICA. ELSEWHERE...WIDELY SCATTERED MODERATE CONVECTION IS OVER
JAMAICA...HISPANIOLA...AND THE LEEWARD ISLANDS. IN THE UPPER
LEVELS...AN UPPER LEVEL RIDGE IS OVER THE W CARIBBEAN W OF 80W
WITH STRONG SUBSIDENCE. ZONAL FLOW IS OVER THE REMAINDER OF THE
CARIBBEAN SEA. SIGNIFICANT UPPER LEVEL MOISTURE WITH BROKEN HIGH
CLOUDS COVERS THE E CARIBBEAN E OF 67W. EXPECT CONTINUED SHOWERS
AND CONVECTION FOR THE NEXT 24 HOURS OVER THE MAJORITY OF THE
CARIBBEAN MOSTLY E OF 85W.

THE ATLANTIC OCEAN...
SCATTERED SHOWERS ARE OVER THE BAHAMAS. FURTHER N ...A SURFACE
TROUGH IS OVER THE W ATLANTIC FROM 32N77W TO 28N80W MOVING E.
SCATTERED SHOWERS ARE WITHIN 60 NM OF THE TROUGH AXIS. A 1026 MB
HIGH IS OVER THE CENTRAL ATLANTIC NEAR 34N58W. THE TAIL END OF A
COLD FRONT IS OVER THE CENTRAL ATLANTIC FROM 31N35W TO 26N48W.
SCATTERED SHOWERS ARE WITHIN 60 NM OF THE FRONT. ANOTHER COLD
FRONT IS OVER THE E ATLANTIC ALONG 31N26W 24N32W. A STATIONARY
FRONT CONTINUES TO 19N40W TO 14N46W. SCATTERED SHOWERS ARE
WITHIN 90 NM OF THE FRONTS. IN THE UPPER LEVELS...AN UPPER LEVEL
LOW IS CENTERED NEAR 41N32W SUPPORTING THE CENTRAL AND EASTERN
ATLANTIC FRONTS. EXPECT THE FRONTS TO MOVE E OVER THE NEXT 24
HOURS WITH CONTINUED SHOWERS.

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

$$
FORMOSA






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