[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 231729
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
205 PM EDT MON MAR 23 2009

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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1715 UTC.

...ITCZ...
ITCZ AXIS IS CENTERED ALONG 6N11W CROSSING THE EQUATOR NEAR 29W
CONTINUES TO 1S30W AND INTO NE BRAZIL NEAR 3S40W. NO SIGNIFICANT
CONVECTION.

...DISCUSSION...
GULF OF MEXICO...
MIDDLE TO UPPER LEVEL SHORTWAVE TROUGH IS ACROSS THE ERN GULF E
OF 87W AND IS ENHANCING SCATTERED SHOWERS BROUGHT IN BY BRISK
ELY SURFACE FLOW ACROSS SE GULF E OF 85W INCLUDING THE FLORIDA
KEYS AND STRAITS OF FLORIDA. MID/UPPER LEVEL RIDGE IS OVER THE
WESTERN GULF OF MEXICO WITH AXIS FROM THE LOUISIANA COAST SW
ACROSS CENTRAL MEXICO. EXCEPT FOR THE SHOWERS OVER THE SE GULF
AND HIGH CLOUD OVER THE NW GULF MODERATE TO STRONG SUBSIDENCE
WITH DRY STABLE AIR ACROSS THE MID AND UPPER LEVELS OF THE
ATMOSPHERE COVERS THE REMAINDER OF THE GULF.

CARIBBEAN SEA...
MID/UPPER LEVEL TROUGH OVER THE NW CARIBBEAN EXTENDS FROM WEST
ATLC TROUGH ACROSS WESTERN CUBA TO BELIZE. MODERATE TO STRONG
SUBSIDENCE COVERS THE AREA N OF 15N W OF 77W. OTHERWISE A BROAD
UPPER LEVEL RIDGE COVERS THE REMAINDER OF THE CARIBBEAN. THE
TAIL END OF A 80 TO 100 KT STREAM JET EXTENDS FROM ERN HONDURAS
NE ACROSS JAMAICA AND HISPANIOLA INTO THE CENTRAL ATLC.
BROKEN TO OVERCAST MID/HIGH CLOUDS ARE WITHIN 360 NM SE OF THE
JET. MODERATE TO FRESH TRADE WINDS ARE BLOWING ACROSS MUCH OF
THE CARIBBEAN WITH SCATTERED SHOWERS MAINLY E OF 80W AND ALONG
THE COAST OF COSTA RICA AND PANAMA.

ATLANTIC OCEAN...
MID/UPPER LEVEL TROUGH OVER THE NW ATLC...MODERATE TO STRONG
SUBSIDENCE WITHIN THE TROUGH N OF 24N OF 66W. A 100-120 KT
JETSTREAM EXTENDS FROM HISPANIOLA TO 24N60W SE TO 18N39N WHERE
WINDS DECREASE TO 90-95W...THEN CONTINUE TO 7N25W. HIGH LEVEL
MOISTURE IS S OF THE JET AXIS, A WEAKENING COLD FRONT EXTENDS
FROM 32N54W TO 21N61W. SCATTERED SHOWERS ARE WITHIN 180 NM E OF
THE COLD FRONT N OF 23N. UPPER LEVEL RIDGE WITH AXIS FROM 32N40W
TO 20N48W, A MID/UPPER LEVEL TROUGH IS E OF THE RIDGE.

$$
DGS


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