[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 111125
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
705 AM EST THU DEC 10 2009

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 1015 UTC.

...THE ITCZ...

FROM NORTHERN LIBERIA TO 5N20W 3N30W 2N40W 1N46W...INTO EXTREME
NORTHEASTERN BRAZIL ALONG THE EQUATOR AT 50W. ISOLATED MODERATE
SHOWERS AND POSSIBLE THUNDERSTORMS ARE TO THE SOUTH OF 8N
TO THE EAST OF 58W.

...DISCUSSION...

THE GULF OF MEXICO...
THE CURRENT COLD FRONT PASSES THROUGH THE STRAITS OF FLORIDA TO
KEY WEST FLORIDA TO 25N90W. A STATIONARY FRONT CONTINUES FROM
25N90W TO 24N93W...CURVING TO A 1014 MB LOW PRESSURE CENTER THAT
IS NEAR 22N95W. BROKEN TO OVERCAST MULTILAYERED CLOUDS AND
POSSIBLE PRECIPITATION COVER MUCH OF THE AREA EXCEPT THAT PART
THAT IS TO THE SOUTH OF 23N BETWEEN 83W AND 90W.

THE CARIBBEAN SEA...
CLOUDS AND POSSIBLE PRECIPITATION COVER THE WATERS FROM 20N TO 23N
BETWEEN 68W AND 72W...TO THE NORTH OF HISPANIOLA...AND JUST OFF THE
SOUTHEASTERN BAHAMAS. SHOWERS ARE POSSIBLE IN THE TRADEWIND CLOUDS
THAT ARE ELSEWHERE TO THE EAST OF 70W...FROM 15N TO 20N BETWEEN 70W
AND 80W...AND TO THE WEST OF 84W.

THE ATLANTIC OCEAN...
A DEEP LAYER WESTERN ATLANTIC OCEAN TROUGH SUPPORTS THE CURRENT COLD
FRONT THAT PASSES THROUGH 32N67W TO THE STRAITS OF FLORIDA NEAR
KEY WEST. ONE CELL OF PRECIPITATION IS NEAR 24.5N80W JUST OFF THE
FLORIDA COAST. ISOLATED MODERATE SHOWERS ARE IN THE WESTERN ATLANTIC
OCEAN WITHIN 30 NM TO 60 NM ON EITHER SIDE OF 29N70W BEYOND 32N64W.
AN EASTERN ATLANTIC OCEAN DEEP LAYER TROUGH PASSES THROUGH 32N25W TO
30N26W TO 26N28W. THIS TROUGH SUPPORTS A COLD FRONT THAT PASSES
THROUGH 32N19W TO 27N25W TO 24N33W. A SURFACE TROUGH CONTINUES FROM
24N33W TO 22N43W AND 21N53W. SCATTERED MODERATE SHOWERS TO ISOLATED
STRONG THUNDERSTORMS ARE WITHIN 30 NM TO 60 NM ON EITHER SIDE OF
27N22W BEYOND 31N17W. BROAD UPPER LEVEL ANTICYCLONIC FLOW COVERS THE
AREA BETWEEN THE TWO DEEP LAYER TROUGHS. UPPER LEVEL ANTICYCLONIC
FLOW IS TO THE SOUTH OF 16N BETWEEN 10W AND NORTHEASTERN SOUTH
AMERICA. A SEPARATE AREA OF UPPER LEVEL SOUTHWESTERLY WINDS ARE TO
SOUTH OF 9N30W BEYOND 16N16W. A 1026 MB HIGH PRESSURE CENTER IS NEAR
29N46W. SURFACE ANTICYCLONIC FLOW COVERS THE AREA BETWEEN THE 32N19W
24N33W COLD FRONT/TROUGH AND THE 32N67W-KEY WEST FLORIDA COLD FRONT
FROM THE WESTERN ATLANTIC OCEAN TO THE STRAITS OF FLORIDA.

$$
MT





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