[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 281148
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
705 AM EST SUN NOV 28 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 1115 UTC.

...THE ITCZ...

FROM SOUTHERN SIERRA LEONE TO 6N20W 4N30W 2N40W...PASSING
THROUGH THE EQUATOR ALONG 49W...INTO NORTHEASTERN BRAZIL NEAR
1S52W. STRONG RAINSHOWERS AND THUNDERSTORMS ARE IN CLUSTERS
FROM 9N TO 11N BETWEEN 35W AND 40W...AND FROM 10N TO 12N
BETWEEN 45W AND 48W. ISOLATED MODERATE RAINSHOWERS AND POSSIBLE
THUNDERSTORMS ARE ELSEWHERE IN THE ATLANTIC OCEAN TO THE SOUTH
OF 12N TO THE EAST OF 60W.

...DISCUSSION...

THE GULF OF MEXICO...

AN UPPER LEVEL ATLANTIC OCEAN TROUGH THAT PARALLELS THE U.S.A.
EAST COAST PASSES THROUGH NORTHERN FLORIDA INTO THE SOUTHWESTERN
CORNER OF THE AREA. THIS TROUGH SUPPORTS THE COLD FRONT THAT
PASSES THROUGH BERMUDA IN THE ATLANTIC OCEAN TO THE FLORIDA EAST
COAST NEAR 27N80W...INTO THE SOUTH CENTRAL GULF OF MEXICO...TO
THE ISTHMUS OF TEHUANTEPEC OF MEXICO. SURFACE HIGH PRESSURE IS
BUILDING ALONG A RIDGE THAT PASSES THROUGH THE TEXAS/LOUISIANA
BORDER TO 25N96W...TO THE ISTHMUS OF TEHUANTEPEC ABOUT 120 NM
TO THE WEST OF THE COLD FRONT. BROKEN TO OVERCAST MULTILAYERED
CLOUDS AND POSSIBLE PRECIPITATION ARE WITHIN 90 NM ON EITHER
SIDE OF THE LINE THAT PASSES THROUGH 27N80W TO 25N90W 22N92W...
INTO THE ISTHMUS OF TEHUANTEPEC. BROKEN MULTILAYERED CLOUDS AND
HAZE ARE IN MEXICO AND ADJACENT COASTAL WATERS FROM 17N TO 24N
BETWEEN 95W AND 99W. AN UPPER LEVEL TROUGH IS DIGGING TOWARD
SOUTHERN CALIFORNIA AND THE NORTHERN BAJA CALIFORNIA PENINSULA.
UPPER LEVEL WESTERLY AND SOUTHWESTERLY WIND FLOW CROSSES MEXICO
FROM THE EASTERN PACIFIC OCEAN.

THE CARIBBEAN SEA...

AN UPPER LEVEL RIDGE EXTENDS FROM NORTHEASTERN VENEZUELA...
ACROSS THE PENINSULA DE LA GUAJIRA OF NORTHEASTERN COLOMBIA...
TO THE YUCATAN PENINSULA. A SURFACE TROUGH IS ALONG 15N68W...
TO JUST TO THE WEST OF CURACAO...INTO NORTHWESTERN VENEZUELA
NEAR 9N70W. NUMEROUS STRONG RAINSHOWERS AND THUNDERSTORMS ARE
FROM 13N TO 15N BETWEEN 67W AND 74W. STRONG RAINSHOWERS AND
THUNDERSTORMS ARE ALONG PANAMA COAST FROM 9N TO 10N BETWEEN 78W
AND 79W. OTHER RAINSHOWERS ARE TO THE SOUTH OF 10N BETWEEN
COLOMBIA AND THE STRONG PANAMA PRECIPITATION. THIS PRECIPITATION
IS OCCURRING WITHIN 90 NM TO THE NORTH OF THE ITCZ. ISOLATED
MODERATE RAINSHOWERS ARE FROM 10N TO 15N BETWEEN 78W AND 80W...
IN THE AREA OF A BROAD SURFACE TO LOW LEVEL TROUGH.

THE ATLANTIC OCEAN...

AN UPPER LEVEL TROUGH IS IN THE ATLANTIC OCEAN...PARALLEL TO THE
U.S.A. EAST COAST. A COLD FRONT PASSES THROUGH BERMUDA TO THE
FLORIDA EAST COAST NEAR 26N80W...AND INTO THE SOUTH CENTRAL GULF
OF MEXICO. RAINSHOWERS ARE POSSIBLE WITHIN 120 NM ON EITHER SIDE
OF THE LINE THAT PASSES THROUGH 33N60W TO 29N70W TO 26N80W.
UPPER LEVEL SOUTHWESTERLY WIND FLOW IS ALONG THE SOUTHEASTERN
SIDE OF THE TROUGH. AN UPPER LEVEL RIDGE STARTS NEAR 17N60W AND
PASSES BEYOND 32N54W. SURFACE ANTICYCLONIC FLOW MOVES AROUND
A RIDGE THAT IS ALONG 33N52W...TO A 1019 MB HIGH PRESSURE CENTER
THAT IS NEAR 26N60W...ACROSS THE NORTHERN BAHAMAS TO THE FLORIDA
STRAITS. ANOTHER SURFACE RIDGE EXTENDS FROM THE 1020 MB HIGH
PRESSURE CENTER TO 15N55W. DEEP LAYER CYCLONIC FLOW COVERS THE
AREA TO THE NORTH OF 16N TO THE EAST OF 46W. A TRIPLE POINT IS
NEAR 32N23W. A COLD FRONT EXTENDS FROM THE TRIPLE POINT TO
23N30W 19N37W...DISSIPATING AND CONTINUING TO 17N44W. A WARM
FRONT CONTINUES FROM THE TRIPLE POINT TO 32N15W...AND THEN
ALONG 32N BEYOND 32N10W. RAINSHOWERS AND THUNDERSTORMS ARE TO
THE NORTH OF 20N BETWEEN THE WESTERN CANARY ISLANDS AND 36W.

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

$$
MT




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