[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 221045
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
705 AM EST WED DEC 22 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 1015 UTC.

...THE ITCZ...

FROM THE LIBERIA COAST NEAR 6N10W TO 5N20W 4N30W 4N39W...INTO
NORTHEASTERN BRAZIL NEAR 2N50W. NUMEROUS STRONG RAINSHOWERS AND
THUNDERSTORMS ARE FROM 2N TO 10N BETWEEN 43W AND 53W...INCLUDING
THE COASTAL PLAINS AND COASTAL WATERS FROM NORTHEASTERN BRAZIL
NEAR THE EQUATOR TO FRENCH GUIANA. ISOLATED MODERATE RAINSHOWERS
ARE WITHIN 15 NM ON EITHER SIDE OF A LINE THAT GOES FROM 4.7N24W
TO 4N34W TO 5N41.6W. WARMING CLOUD TOP TEMPERATURES AND
WEAKENING PRECIPITATION ARE FROM 1S TO 2N BETWEEN 14W AND 23W.
OTHER ISOLATED AND DISORGANIZED RAINSHOWERS ARE TO THE SOUTH
OF 5N TO THE EAST OF 12W.

...DISCUSSION...

FROM THE ATLANTIC OCEAN ALONG 67W INTO THE GULF OF MEXICO...

BROAD UPPER LEVEL ANTICYCLONIC FLOW SPANS THE AREA BETWEEN 80W
ALONG FLORIDA AND 110W IN THE EASTERN PACIFIC OCEAN. A SURFACE
RIDGE EXTENDS FROM THE SOUTHEASTERN DOMINICAN REPUBLIC TO
22N76W...TO A 1021 MB HIGH PRESSURE CENTER THAT IS NEAR 26N84W
OFF THE FLORIDA WEST COAST...TOWARD THE MIDDLE TEXAS GULF COAST.

IN THE ATLANTIC OCEAN BETWEEN 40W AND 65W...AND INTO THE
CENTRAL CARIBBEAN SEA...

BROAD CYCLONIC FLOW ON WATER VAPOR IMAGERY COVERS THE ATLANTIC
OCEAN BETWEEN 40W AND 80W. A COLD FRONT PASSES THROUGH 32N43W TO
23N50W TO 20N55W...INTO THE GUADELOUPE PASSAGE JUST TO THE SOUTH
OF ANTIGUA. A SURFACE TROUGH CONTINUES FROM ANTIGUA TO 14N70W.
GALE FORCE WINDS ARE IN THE ATLANTIC OCEAN TO THE NORTH OF 28N
BETWEEN THE FRONT AND 64W...WITH SEA HEIGHTS RANGING FROM
18 FEET TO 30 FEET. ISOLATED MODERATE RAINSHOWERS ARE WITHIN
240 NM TO 360 NM TO THE EAST OF THE FRONT TO THE NORTH OF 24N...
AND WITHIN 60 NM TO THE EAST OF THE FRONT MOSTLY FROM 20N TO 24N.
COLD-AIR STRATIFORM CLOUDS COVER THE ATLANTIC OCEAN TO THE NORTH
OF 20N TO THE WEST OF THE FRONT. SCATTERED STRONG RAINSHOWERS
AND THUNDERSTORMS ARE IN THE CARIBBEAN SEA FROM 14N TO 15N
BETWEEN 66W AND 69W. BROKEN TO OVERCAST LOW LEVEL TO MIDDLE
LEVEL CLOUDS ARE IN THE CARIBBEAN SEA IN GENERAL FROM 13N TO 20N
BETWEEN 60W AND 77W.  GALE FORCE WINDS ARE TO THE NORTH OF 28N
BETWEEN THE FRONT AND 64W...WITH SEA HEIGHTS RANGING FROM
18 FEET TO 30 FEET.

THE REST OF THE CARIBBEAN SEA...

A 1009 MB LOW PRESSURE CENTER IS NEAR 13N60W...ABOUT 20 NM
TO THE EAST OF GRENADA...BEING RE-LOCATED BASED ON SURFACE
OBSERVATIONS. A SURFACE TROUGH EXTENDS FROM 15N55W TO 14N58W...
CURVING TO THE LOW CENTER...ACROSS NORTHWESTERN TRINIDAD
TO NORTHEASTERN VENEZUELA NEAR 9N63W. RAINSHOWERS AND
THUNDERSTORMS ARE FROM 11N TO 14N BETWEEN 61W AND 64W. UPPER
LEVEL WINDS ARE NOT CONDUCIVE FOR SIGNIFICANT DEVELOPMENT INTO
A TROPICAL CYCLONE...AND CONDITIONS ARE EXPECTED TO REMAIN
UNFAVORABLE FOR DEVELOPMENT DURING THE NEXT SEVERAL DAYS. THIS
SYSTEM WILL ENHANCE RAINFALL AND WINDS ACROSS IN THE SOUTHEASTERN
CORNER OF THE AREA DURING THE NEXT 24 HOURS. A SURFACE TROUGH
EXTENDS FROM THE PENINSULA DE LA GUAJIRA OF NORTHEASTERN COLOMBIA
TO 15N76W. WIDELY SCATTERED MODERATE RAINSHOWERS AND ISOLATED
STRONG THUNDERSTORMS COVER THE AREA FROM 12N TO 16N BETWEEN
71W AND 76W.

THE REST OF THE ATLANTIC OCEAN...

BROAD UPPER LEVEL CYCLONIC FLOW IS TO THE NORTH OF 20N TO THE
EAST OF 20W ACROSS AFRICA. A COLD FRONT PASSES THROUGH 32N9W
IN COASTAL MOROCCO...TO THE SOUTHERN CANARY ISLANDS...CURVING
NORTHWESTWARD TO 31N30W. A STATIONARY FRONT CONTINUES
NORTHWESTWARD BEYOND 32N32W. SURFACE ANTICYCLONIC WIND FLOW
COVERS THE AREA FROM THE CAPE VERDE ISLANDS NEAR 15N TO THE
FRONTAL BOUNDARY BETWEEN THE CANARY ISLANDS AND 42W. THE
ANTICYCLONIC FLOW MOVES AROUND A 1018 MB HIGH PRESSURE CENTER
THAT IS NEAR 25N33W.

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

$$

MT




This weather bulletin was brought to you by:
www.nashvilleweather.net