[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 061130
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
705 AM EST MON DEC 06 2010

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...METEOROLOGICAL ANALYSIS...WEATHER OBSERVATIONS...AND
RADAR.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 1045 UTC.

...THE ITCZ...

FROM THE COAST OF SIERRA LEONE NEAR 9N13W TO 4N31W...TO THE
BRAZIL/FRENCH GUIANA BORDER NEAR 4N52W. ISOLATED MODERATE
RAINSHOWERS AND LOCALLY STRONG THUNDERSTORMS ARE WITHIN
120 NM TO 180 NM ON EITHER SIDE OF 3N3W 6N12W 4N23W 4N33W
5N44W 7N48W 8N62W.

...DISCUSSION...

THE GULF OF MEXICO...
THE COLD FRONT CROSSES THE BERRY ISLANDS OF THE NORTHERN BAHAMAS
TO THE NORTHERN FLORIDA KEYS...INTO THE CENTRAL GULF OF
MEXICO...TO THE WEST CENTRAL GULF WATERS NEAR 24N96W...CURVING
SOUTHWARD TO THE MEXICO GULF COAST NEAR 19N. A STATIONARY FRONT
BANKS AGAINST THE MOUNTAINS OF MEXICO FROM THE MEXICO COAST NEAR
19N TOWARD THE TEXAS BIG BEND. THE LOW TO MIDDLE LEVEL CLOUDS
AND POSSIBLE RAINSHOWERS THAT ARE ASSOCIATED WITH THE FRONT
COVER THE GULF WATERS FROM CUBA AND THE FLORIDA STRAITS NEAR 22N
TO 25N TO THE EAST OF 90W...AND FROM 22N TO 25N BETWEEN 90W AND
THE MEXICO COAST. BROKEN TO OVERCAST MULTILAYERED CLOUDS AND
POSSIBLE PRECIPITATION ALSO ARE ELSEWHERE FROM 20N TO 27N
BETWEEN 94W AND THE TEXAS/MEXICO COASTS.

THE CARIBBEAN SEA...
AN UPPER LEVEL RIDGE SPANS THE AREA FROM THE SOUTHEASTERN CORNER
TOWARD THE NORTHWESTERN CORNER. RAINSHOWERS AND THUNDERSTORMS
ARE OCCURRING FROM THE VENEZUELA COAST TO 16N BETWEEN 65W AND
70W IN AN AREA OF THE REMNANT 700 MB INVERTED TROUGH OF 24 HOURS
AGO. CLOUDS AND RAINSHOWERS ARE TO THE SOUTH OF 15N BETWEEN 71W
AND 80W...INCLUDING INTO WESTERN COLOMBIA TO 4N...IN AN AREA OF
A LOW LEVEL TO MIDDLE LEVEL TROUGH. LOW CLOUDS AND POSSIBLE
RAINSHOWERS ARE WITHIN 30 NM TO 60 NM ON EITHER SIDE OF THE LINE
FROM 22N64W IN THE ATLANTIC OCEAN...TO 19N68W AT THE EASTERN
COAST OF THE DOMINICAN REPUBLIC...ACROSS THE ISLAND TO
SOUTHWESTERN HAITI NEAR 18N73W...TO 17N75W AND 15N79W...AND THEN
FROM 10N TO 15N BETWEEN 81W AND 85W INCLUDING PARTS OF NICARAGUA
AND COSTA RICA. THESE CLOUDS AND POSSIBLE PRECIPITATION ARE PART
OF THE REMNANT CLOUD LINE FROM THE LAST 24 HOURS. THE REMNANT
CLOUD LINE IS RELATED TO A FORMER COLD FRONT.

THE ATLANTIC OCEAN...
THE CURRENT ATLANTIC COLD FRONT PASSES THROUGH 32N62W TO
28N70W...ACROSS THE BERRY ISLANDS OF THE NORTHERN BAHAMAS...
AND BEYOND THE NORTHERN FLORIDA KEYS INTO THE GULF OF MEXICO.
RAINSHOWERS ARE WITHIN 30 NM TO 60 NM ON EITHER SIDE OF THE COLD
FRONT. COLD-AIR STRATIFORM CLOUDS ARE OVER THE WATERS TO THE
NORTHWEST OF THE FRONT. RAINSHOWERS ARE TO THE NORTH OF 28N
BETWEEN 36W AND 40W. BROAD UPPER LEVEL SOUTHWESTERLY WIND FLOW
IS TO THE SOUTHEAST OF 20N62W 24N40W BEYOND 31N17W. THIS
SOUTHWESTERLY FLOW MERGES WITH THE BROAD MIDDLE LEVEL TO UPPER
LEVEL CYCLONIC FLOW THAT HAS PERSISTED DURING THE LAST FEW
DAYS...TO THE NORTH OF 25N TO THE EAST OF 45W. BROAD SURFACE
CYCLONIC FLOW COVERS THE AREA TO THE NORTH OF 25N TO THE EAST
OF 40W. NO FRONTAL BOUNDARY IS TO THE SOUTH OF 30N. THE
SOUTHERNMOST POINT OF THE LONE FRONT REACHES 33N12W. SURFACE
ANTICYCLONIC FLOW MOVES AROUND A 1017 MB HIGH PRESSURE CENTER
THAT IS NEAR 24N53W. ANTICYCLONIC FLOW COVERS THE ATLANTIC OCEAN
TO THE NORTH OF 17N BETWEEN 40W AND 70W.

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

$$
MT





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