[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 170458
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
205 AM EDT WED MAR 17 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 0000 UTC SURFACE ANALYSIS AND GOES-12 SATELLITE IMAGERY
THROUGH 0315 UTC AND METEOSAT-7 IMAGERY THROUGH 0500 UTC...

...THE ITCZ...

FROM THE COAST OF LIBERIA NEAR 6N10W TO 2N20W TO 1N30W
3N44W...CURVING INTO NORTHEASTERN COASTAL BRAZIL NEAR 1N53W.
ISOLATED MODERATE SHOWERS COVER THE AREA FROM 1N TO 5N
BETWEEN 4W AND 8W...AND FROM 2N TO 7N BETWEEN 12W AND
THE COAST OF SOUTH AMERICA.

...DISCUSSION...

FROM THE EASTERN PACIFIC OCEAN...ACROSS MEXICO INTO THE GULF
OF MEXICO...AND ISOLATED MODERATE SHOWERS FROM HONDURAS
INTO THE YUCATAN PENINSULA...
AN UPPER LEVEL RIDGE IS ALONG THE WESTERN MEXICO COAST FROM
20N INTO SOUTHERN CALIFORNIA. BROAD MIDDLE LEVEL TO UPPER LEVEL
CYCLONIC FLOW...TO THE NORTH OF 20N BETWEEN 85W AND 107W...
ACCOMPANIES A CYCLONIC CIRCULATION CENTER THAT IS MOVING THROUGH
THE GULF COASTAL AREA OF THE UPPER TEXAS GULF COAST/SOUTHWESTERN
LOUISIANA GULF COAST. A TROUGH EXTENDS FROM THE CYCLONIC CENTER
TO SOUTH CENTRAL MEXICO NEAR 20N102W. UPPER LEVEL MOISTURE IS
MOVING ACROSS THE GULF OF MEXICO FROM THE SOUTHWESTERN CORNER
OF THE AREA BEYOND FLORIDA AND THE BAHAMAS...INTO THE ATLANTIC
OCEAN. SHOWERS ARE POSSIBLE TO THE NORTH OF 29N...OVER LAND...
BETWEEN SOUTHEASTERN ALABAMA AND SOUTHWESTERN LOUISIANA.
ISOLATED MODERATE SHOWERS ALSO COVER THE AREAS FROM SOUTH
CENTRAL HONDURAS TO THE SOUTHERN YUCATAN PENINSULA/NORTHERN
GUATEMALA.

THE CARIBBEAN SEA...
HIGH LEVEL MOISTURE THAT IS MOVING ACROSS THE GULF OF MEXICO
SPILLS INTO THE NORTHWESTERN CORNER OF THE AREA...TO THE
NORTHWEST OF THE LINE THAT RUNS THROUGH 22N79W IN CUBA BEYOND
18N88W. A STATIONARY FRONT GOES FROM 20N67W INTO THE
SOUTHWESTERN DOMINICAN REPUBLIC. ...ACROSS HISPANIOLA...
TO 17N75W. SHOWERS ARE POSSIBLE EVERYWHERE IN HISPANIOLA.
THE SURFACE PRESSURE GRADIENT ACROSS THE AREA IS WEAK. ONE
REGIME OF BROAD UPPER LEVEL ANTICYCLONIC WIND FLOW THAT
ORIGINATES FROM THE EASTERN PACIFIC OCEAN INTO THE GULF OF
MEXICO AND THE ATLANTIC OCEAN COVERS THE AREA. A SECOND AREA
OF UPPER LEVEL ANTICYCLONIC FLOW MOVES FROM THE EASTERN PACIFIC
OCEAN AND SOUTH AMERICA TO THE SOUTH OF 10N ACROSS THE SOUTHERN
CARIBBEAN SEA.

THE ATLANTIC OCEAN...
BROAD UPPER LEVEL ANTICYCLONIC FLOW COVERS THE AREA TO THE SOUTH
OF 30N TO THE WEST OF 30W. MIDDLE LEVEL TO UPPER LEVEL CYCLONIC
FLOW COVERS THE AREA TO THE NORTH OF 30N TO THE WEST OF 30W.
ONE AREA OF COMPLEX CYCLONIC FLOW...WITH MORE THAN ONE CYCLONIC
CENTER...IS BETWEEN 45W AND 66W. A COLD FRONT PASSES THROUGH
32N52W TO 26N60W AND 24N72W. BROKEN TO OVERCAST MULTILAYERED
CLOUDS AND POSSIBLE SHOWERS ARE TO THE NORTHWEST OF THE LINE
THAT PASSES THROUGH 33N41W 28N50W 25N60W 22N74W. A SECOND AREA
OF CYCLONIC FLOW IS BETWEEN 20W AND 40W. THIS TROUGH SUPPORTS
A COLD FRONT THAT PASSES THROUGH 32N36W TO 30N40W. A STATIONARY
FRONT CONTINUES FROM 30N40W TO 26N50W 23N60W...TO 20N68W INTO
THE SOUTHWESTERN DOMINICAN REPUBLIC. BROKEN TO OVERCAST
MULTILAYERED CLOUDS AND POSSIBLE SHOWERS ARE TO THE NORTH OF 24N
BETWEEN 26W AND 53W. BROKEN TO OVERCAST HIGH CLOUDS ARE TO THE
NORTH OF 23N BETWEEN AFRICA AND 27W. AN UPPER LEVEL TROUGH
PASSES THROUGH ALGERIA TO NORTHERN MAURITANIA...PARTS OF THE
WESTERN SAHARA...TOWARD THE CAPE VERDE ISLANDS. A SURFACE TROUGH
HUGS THE COAST OF WESTERN AFRICA...THROUGH 32N10W 26N14W TO
15N15W. SURFACE ANTICYCLONIC FLOW COVERS THE AREA FROM 10N TO
THE 32N36W 20N68W FRONTAL BOUNDARY...EASTWARD TO AFRICA...AROUND
A 1018 MB HIGH PRESSURE CENTER THAT IS NEAR 20N31W.

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

$$
MT





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