[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 250010
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
705 PM EST THU 24 FEB 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2315 UTC.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 5N10W EQ20W 3S40W THEN INLAND OVER
SOUTH AMERICA.  SCATTERED SHOWERS ARE WITHIN 90 NM OF THE AXIS
BETWEEN 10W-20W.

...DISCUSSION...

GULF OF MEXICO...
1008 MB LOW IS ALONG THE COAST OF LOUISIANA NEAR 29N91W AT 1500
UTC WITH COLD FRONT EXTENDING SW TO S TEXAS NEAR 26N97W AND
CONTINUING AS A STATIONARY FRONT ALONG THE BASE OF THE SIERRA
ORIENTAL MOUNTAINS AT 26N101W 29N102W 31N107W.  A WARM FRONT
EXTENDS E FROM THE SURFACE LOW TO 29N87W AND CONTINUES AS A COLD
FRONT TO N FLORIDA AT 31N82W.  SCATTERED MODERATE CONVECTION IS
OVER THE NW GULF OF MEXICO WITHIN 90 NM OF THE FRONT. ELSEWHERE
OVER THE GULF...MAINLY FAIR WEATHER PREVAILS WITH HIGH LEVEL
CLOUDINESS STREAKING ACROSS THE AREA.  IN THE UPPER LEVELS...
LONGWAVE TROUGH EXTENDS FROM THE YUCATAN PENINSULA TO NW TEXAS.
AN EMBEDDED CYCLONIC CIRCULATION IS OVER SE LOUISIANA NEAR
30N90W ENHANCING THE FRONTAL ACTIVITY.  THE CYCLONIC CIRCULATION
AND ASSOCIATED SURFACE LOW ARE EXPECTED TO CONTINUE TO MOVE E TO
THE NE GULF OF MEXICO TONIGHT.

CARIBBEAN...
MODERATE TRADES CONTINUE OVER THE AREA COURTESY OF HIGH PRESSURE
OVER THE CENTRAL ATLANTIC.  POCKETS OF MOISTURE AND SCATTERED
SHOWERS ARE MOVING WITH THE TRADES ESPECIALLY OVER THE LEEWARD
ISLANDS FROM 14N-20N BETWEEN 56W-68W TO INCLUDE PUERTO RICO AND
THE VIRGIN ISLANDS.  ANOTHER AREA OF MOISTURE AND SHOWERS IS
CURRENTLY MOVING ACROSS THE SW CARIBBEAN FROM 9N-17N BETWEEN
80W-84W TO INCLUDE PANAMA...COSTA RICA...AND NICARAGUA.  IN THE
UPPER LEVELS...BROAD/FLAT MID/UPPER LEVEL RIDGE WITH SW FLOW
REMAINS OVER THE AREA WITH A DRY/TRANQUIL PATTERN ALOFT LIMITING
THE VERTICAL DEVELOPMENT OF CLOUDS/PRECIPITATION.

ATLANTIC...
1025 MB HIGH IS OVER THE W ATLANTIC NEAR 31N63W.  A COLD FRONT
IS OVER THE CENTRAL ATLANTIC ALONG 32N36W 30N40W 27N50W
CONTINUING AS A DISSIPATING STATIONARY FRONT TO 25N60W.  WHILE
LACKING SIGNIFICANT UPPER LEVEL SUPPORT...THE FRONT IS PRODUCING
A BAND OF OVERCAST LOW/MID CLOUDS WITH SCATTERED MODERATE
CONVECTION FROM 30N-34N BETWEEN 30W-33W.  ANOTHER 1020 MB HIGH
IS OVER THE E ATLANTIC NEAR 23N40W.  IN THE UPPER LEVELS... A
LONGWAVE RIDGE IS OVER THE W ATLANTIC N OF 20N AND W OF 60W.
RIDGE AXIS IS ALONG 70W.  THE CENTRAL ATLANTIC N OF 10N BETWEEN
60W-25W HAS ZONAL UPPER LEVEL WESTERLY FLOW.  THE E ATLANTIC HAS
A DEEP LAYERED LOW/TROUGH EXTENDING FROM THE CANARY ISLANDS N
OF 25N E OF 25W WITH A SURFACE TROUGH EXTENDING THROUGH 32N11W
SE INLAND TO AFRICA TO NEAR 29N10W 26N14W.  THE SYSTEM IS
PRODUCING AN AREA OF CLOUDINESS AND SCATTERED SHOWERS/ISOLATED
THUNDERSTORMS N OF 26N E OF 20W TO THE COAST OF AFRICA INCLUDING
THE CANARY ISLANDS. FARTHER S...STRONG ZONAL FLOW EXTENDS ACROSS
THE ENTIRE TROPICAL ATLANTIC WITH WEAK UPPER RIDGING ALONG THE
EQUATOR.

$$
FORMOSA


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