[Tropical] Tropical Weather Discussion

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AXNT20 KNHC 070554
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
105 AM EST THU JAN 07 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 THE 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 0515 UTC.

...THE ITCZ...

FROM COASTAL LIBERIA NEAR 6N11W TO 6N23W TO 2N40W TO THE EXTREME
NORTHEASTERN COAST OF BRAZIL NEAR 1N50W. ISOLATED MODERATE
SHOWERS ARE WITHIN 30 NM ON EITHER SIDE OF 6N12W 6N17W 5N27W
2N38W 1N46W. OTHER SHOWERS AND POSSIBLE THUNDERSTORMS COVER THE
AREA FROM 1N TO 5N BETWEEN THE PRIME MERIDIAN AND 7W.

...DISCUSSION...

THE GULF OF MEXICO...
UPPER LEVEL MOISTURE IS MOVING WITH THE SOUTHWESTERLY WIND FLOW
FROM MEXICO NEAR 23N98W NORTHEASTWARD. THE UPPER LEVEL MOISTURE
COVERS THE AREA TO THE SOUTH OF THE LINE FROM 23N98W IN MEXICO
TO THE NORTH CENTRAL GULF WATERS BEYOND 29N IN NORTHERN FLORIDA.
UPPER LEVEL NORTHWESTERLY WIND FLOW IS PUSHING COMPARATIVELY
DRIER AIR FROM TEXAS INTO THE REST OF THE GULF OF MEXICO...TOWARD
THE AREA OF THE UPPER LEVEL MOISTURE. A SURFACE RIDGE EXTENDS
FROM THE AREA BETWEEN SOUTHEASTERN LOUISIANA AND THE FLORIDA
PANHANDLE TO THE YUCATAN CHANNEL. GALE-FORCE WINDS ARE FORECAST
TO DEVELOP IN THE MIDDLE TEXAS COASTAL WATERS DURING THE NEXT
24 HOURS...ASSOCIATED WITH A LOW PRESSURE CENTER IN THE SOUTH
PLAINS AND CAPROCK OF TEXAS.

THE CARIBBEAN SEA...
SURFACE HIGH PRESSURE COVERS THE AREA TO THE NORTHWEST OF A LINE
THAT EXTENDS FROM HISPANIOLA TO HONDURAS. A STATIONARY FRONT
STRETCHES FROM NORTHWESTERN HAITI TO THE JAMAICA CHANNEL.
A SHEAR AXIS/REMNANT CLOUD LINE FROM AN OLD FRONTAL BOUNDARY
EXTENDS FROM THE JAMAICA CHANNEL TO 16N78W 12N80W...TO THE
COSTA RICA/PANAMA BORDER. BROKEN TO OVERCAST MULTILAYERED CLOUDS
ARE WITHIN 30 NM TO 60 NM ON EITHER SIDE OF 17N79W 14N80W 11N84W
AT THE BORDER OF SOUTHEASTERN NICARAGUA AND NORTHEASTERN COSTA
RICA.

THE ATLANTIC OCEAN...
UPPER LEVEL CYCLONIC FLOW IS BETWEEN THE U.S.A. EAST COAST AND
THE LINE FROM THE CUBA COAST NEAR 22N78W TO 27N62W BEYOND 32N52W.
THE TROUGH FOR THIS CYCLONIC FLOW SUPPORTS A COLD FRONT THAT
PASSES THROUGH 32N51W TO 25N60W TO 22N67W. A STATIONARY FRONT
CONTINUES FROM 22N67W TO NORTHWESTERN HAITI AND THE JAMAICA
CHANNEL. A SHEAR AXIS/REMNANT CLOUD LINE CONTINUES FROM THE
JAMAICA CHANNEL INTO THE SOUTHWESTERN CARIBBEAN SEA. SHOWERS
ARE POSSIBLE WITHIN 150 NM ON EITHER SIDE OF THE LINE THAT
PASSES THROUGH 32N48W 26N60W 20N70W. AN UPPER LEVEL TROUGH
PASSES THROUGH 19N16W ALONG THE MAURITANIA COAST TO THE CAPE
VERDE ISLANDS TO 10N33W TO 5N41W. LARGE-SCALE SURFACE
ANTICYCLONIC FLOW COVERS THE ATLANTIC OCEAN BETWEEN AFRICA AND
THE 32N51W 22N67W FRONT...AROUND A 1023 MB HIGH PRESSURE CENTER
THAT IS NEAR 26N34W.

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

$$

MT



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