[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 290554
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 AM EDT FRI APR 29 2011

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTION
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 SATELLITE IMAGERY
THROUGH 0515 UTC.

...THE ITCZ...

FROM SOUTHERN LIBERIA TO 6N14W 2N27W 3N42W...REACHING EXTREME
NORTHEASTERN BRAZIL NEAR THE EQUATOR ALONG 53W/54W. NUMEROUS
STRONG RAINSHOWERS AND THUNDERSTORMS ARE FROM 1N TO THE COAST
OF AFRICA NEAR 5N BETWEEN THE PRIME MERIDIAN AND 6W...WITHIN
30 NM ON EITHER SIDE OF 6N9W 3N13W...FROM THE EQUATOR TO 3N
BETWEEN 21W AND 27W...AND FROM 2N TO 4N BETWEEN 35W AND 38W.
DISORGANIZED ISOLATED TO WIDELY SCATTERED MODERATE RAINSHOWERS
AND LOCALLY STRONG THUNDERSTORMS ARE ELSEWHERE TO THE SOUTH OF
6N BETWEEN 20W AND NORTHWESTERN BRAZIL.

...DISCUSSION...

THE GULF OF MEXICO...

A COLD FRONT PASSES THROUGH THE NORTH CENTRAL FLORIDA INTO THE
SOUTH CENTRAL GULF WATERS...INTO THE SOUTHWESTERN CORNER OF THE
AREA. SURFACE HIGH PRESSURE IS BUILDING ACROSS THAT PART OF THE
GULF OF MEXICO THAT IS TO THE NORTHWEST OF THE COLD FRONT.
RAINSHOWERS AND THUNDERSTORMS ARE WITHIN 60 NM ON EITHER SIDE
OF 28N83W 29N81W...AND 29N78W BEYOND 32N78W. RAINSHOWERS AND
THUNDERSTORMS HAVE BEEN DISSIPATING IN THE YUCATAN PENINSULA...
IN BROAD SURFACE LOW PRESSURE. SOME PRECIPITATION REMAINS
IN THE NORTHERN HALF OF GUATEMALA.

THE CARIBBEAN SEA...

UPPER LEVEL CYCLONIC FLOW MOVES THROUGH THE WINDWARD PASSAGE.
ISOLATED MODERATE RAINSHOWERS APPEAR TO BE DIMINISHING WITH TIME
IN THE WINDWARD PASSAGE. BROKEN MULTILAYERED CLOUDS AND ISOLATED
MODERATE RAINSHOWERS COVER THE AREA FROM 10N TO 17N BETWEEN 54W
IN THE ATLANTIC OCEAN AND 67W. THIS AREA OF CLOUDS AND
PRECIPITATION WAS BEING ASSOCIATED WITH A SURFACE TROUGH DURING
THE LAST FEW DAYS.

THE ATLANTIC OCEAN...

AN UPPER LEVEL CYCLONIC CIRCULATION CENTER IS NEAR 25N54W.
CYCLONIC FLOW COVERS THE AREA TO THE NORTH OF 20N BETWEEN 44W
AND 71W. RAINSHOWERS ARE POSSIBLE IN THE AREA OF CYCLONIC FLOW.
ONE UPPER LEVEL TROUGH PASSES THROUGH 32N24W TO 27N22W. A SECOND
UPPER LEVEL TROUGH PASSES THROUGH 31N13W TO 27N16W TO 23N18W.
A SURFACE TROUGH REMAINS ALONG 32N15W TO 25N17W. PRECIPITATION
IS POSSIBLE TO THE NORTH OF 27N TO THE EAST OF 20W. BROAD
SURFACE ANTICYCLONIC WIND FLOW COVERS THE ATLANTIC OCEAN TO THE
NORTH OF 17N BETWEEN 40W AND 80W. A 1029 MB HIGH PRESSURE CENTER
IS NEAR 24N57W.

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

$$
MT




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