[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 091054
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT SAT 09 APR 2005

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHEASTERN
SECTIONS OF SOUTH AMERICA...AND ATLANTIC OCEAN TO THE
AFRICAN COAST FROM THE EQUATOR TO 32N. THE FOLLOWING
INFORMATION IS BASED ON SATELLITE IMAGERY...WEATHER
OBSERVATIONS...RADAR...AND METEOROLOGICAL ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND
SATELLITE IMAGERY THROUGH 1015 UTC.

...ITCZ...

ITCZ 10N10W 6N20W 3N30W 2N40W 1N50W. SHOWERS AND
THUNDERSTORMS...WIDELY SCATTERED MODERATE TO ISOLATED STRONG
FROM 2N TO 3N BETWEEN 12W AND 18W AND FROM 2N TO 5N BETWEEN
22W AND 30W...AND SOUTH OF 4N WEST OF 32W.

...DISCUSSION...

FROM THE EASTERN PACIFIC OCEAN TO THE GULF OF MEXICO...
MIDDLE TO UPPER LEVEL TROUGH FROM 27N124W BEYOND 32N118W...
AS CYCLONIC FLOW COVERS CALIFORNIA AND NEVADA...LEADING TO
WESTERLY FLOW ACROSS INTERIOR MEXICO. MIDDLE TO UPPER LEVEL
WESTERLY FLOW COMES OFF MEXICO...ENTERS THE GULF...AND BECOMES
NORTHWESTERLY IN RESPONSE TO A TROUGH...FROM A CYCLONIC
CIRCULATION CENTER NEAR 32N78W...TO THE WATERS BETWEEN THE
BAHAMAS AND SOUTH FLORIDA NEAR 24N79W. THIS TROUGH SUPPORTS
THE SURFACE COLD FRONT WHICH PASSES THROUGH 32N75W TO THE
NORTHERN BAHAMAS NEAR 25N77W TO THE ISLE OF YOUTH OF CUBA.
THE FRONT BEGINS TO DISSIPATE FROM THERE TO 20N84W AND 17N86W.
A SOUTHWESTERN GULF OF MEXICO 1014 MB SURFACE HIGH PRESSURE
CENTER IS NEAR 22N92W. A GALE CENTER 1006 MB LOW PRESSURE
CENTER IS NEAR 34N76W JUST EAST OF THE CAROLINAS OF THE U.S.A.
UPPER LEVEL MOISTURE IS COVERING THE GULF WEST OF 90W...AS
MIDDLE TO UPPER LEVEL DRY AIR ON SOUTHERN SIDE OF THE CYCLONIC
FLOW AROUND THE CENTER AND IN THE TROUGH MOVE EASTWARD WITH
THE WHOLE SYSTEM.

THE CARIBBEAN SEA...
A MIDDLE TO UPPER LEVEL TROUGH RUNS FROM A CYCLONIC CENTER
NEAR 32N78W TO THE WATERS BETWEEN THE BAHAMAS AND SOUTH FLORIDA
NEAR 24N79W. THIS TROUGH SUPPORTS A SURFACE FRONTAL BOUNDARY...
WHICH EVENTUALLY IS A DISSIPATING COLD FRONT...FROM 32N75W TO
THE NORTHERN BAHAMAS NEAR 25N77W TO THE ISLE OF YOUTH OF CUBA.
THE FRONT BEGINS TO DISSIPATE FROM THERE TO 20N84W AND 17N86W.
A LARGE SCALE UPPER LEVEL RIDGE RUNS FROM THE ATLANTIC OCEAN
FROM 20N48W TO 20N60W TOWARD THE CENTRAL NICARAGUA COAST. HIGH
LEVEL MOISTURE IS PASSING OVER THE MIDDLE TO UPPER LEVEL DRY AIR
IN THE AREA. ONE CLUSTER OF SHOWERS AND THUNDERSTORMS IS ALONG
THE PANAMA COAST FROM LAND TO 10N BETWEEN 81W AND 82W.

THE ATLANTIC OCEAN...
A TROUGH EXTENDS FROM A CYCLONIC CIRCULATION CENTER NEAR
32N78W...TO THE WATERS BETWEEN THE BAHAMAS AND SOUTH FLORIDA
NEAR 24N79W. THIS TROUGH SUPPORTS THE SURFACE COLD FRONT WHICH
PASSES THROUGH 32N75W TO THE NORTHERN BAHAMAS NEAR 25N77W TO THE
ISLE OF YOUTH OF CUBA. THE FRONT BEGINS TO DISSIPATE FROM THERE
TO 20N84W AND 17N86W. A GALE CENTER 1006 MB LOW PRESSURE CENTER
IS NEAR 34N76W JUST EAST OF THE CAROLINAS OF THE U.S.A. BROKEN
TO OVERCAST MULTILAYERED CLOUDS AND SCATTERED MODERATE TO
ISOLATED STRONG SHOWERS AND THUNDERSTORMS FROM 23N BEYOND 32N
BETWEEN 66W AND 73W. THE NEXT BIG FEATURE IS THE DEEP LAYER
TROUGH FROM A CYCLONIC CIRCULATION CENTER NEAR 30N38W...ON WATER
VAPOR IMAGERY...TO 26N45W AND 16N50W. MIDDLE TO UPPER LEVEL DRY
AIR IS EVERYWHERE...EXCEPT WITHIN 350 NM FROM THE CENTER SOUTH
THROUGH WEST. SURFACE COLD FRONT FROM 1012 MB LOW PRESSURE
CENTER NEAR 30N39W...CURVING TO 32N37W 30N35W 25N37W TO 21N42W.
SCATTERED MODERATE TO ISOLATED STRONG SHOWERS AND THUNDERSTORMS
ARE NORTH OF 30N BETWEEN 33W AND 39W. ISOLATED TO WIDELY
SCATTERED MODERATE SHOWERS AND THUNDERSTORMS ELSEWHERE NORTH
OF 24N BETWEEN 32W AND 40W. SURFACE RIDGE FROM 1025 MB HIGH
PRESSURE CENTER NEAR 36N54W TO 25N61W TO 18N68W. ANOTHER RIDGE
GOES FROM 23N30W TO 29N22W BEYOND 32N19W.

$$
MT


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