[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 092330
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT MON MAR 09 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2315 UTC.

...ITCZ...

THE ITCZ AXIS IS CENTERED ALONG 6N10W CROSSING THE EQUATOR NEAR
19W THEN ALONG 3S30W 3S38W TO THE COAST OF BRAZIL NEAR 3S43W.
SCATTERED MODERATE CONVECTION IS FROM 2N-4N FROM THE PRIME
MERIDIAN TO 2W. SCATTERED MODERATE CONVECTION IS FROM THE
EQUATOR TO 2N BETWEEN 8W-10W...AND FROM THE EQUATOR TO 1S
BETWEEN 16W-17W. WIDELY SCATTERED MODERATE CONVECTION IS FROM
4S-6S BETWEEN 19W-32W.

...DISCUSSION...

GULF OF MEXICO...
A 1025 MB HIGH IS LOCATED IN THE NE GULF OF MEXICO NEAR 28N84W.
5-10 KT ANTICYCLONIC WINDS AND FAIR WEATHER PREVAIL OVER THE
ENTIRE GULF. TEMPERATURES RANGE FROM THE UPPER 60'S TO THE UPPER
70'S. IN THE UPPER LEVELS...AN UPPER LEVEL RIDGE DOMINATES THE
ENTIRE GULF OF MEXICO WITH RIDGE AXIS ALONG 90W. STRONG
SUBSIDENCE COVERS THE ENTIRE GULF EXCEPT FOR N FLORIDA WHERE
UPPER LEVEL MOISTURE IS NOTED. EXPECT LITTLE CHANGE OVER THE
NEXT 24 HOURS.

CARIBBEAN SEA...
STRONG SURFACE GRADIENT IS OVER THE CARIBBEAN SEA. GALE FORCE
WINDS ARE ALONG THE COAST OF N COLUMBIA. THE REMAINDER OF THE
CARIBBEAN HAS STRONG NE FLOW. PATCHES OF BROKEN LOW CLOUDS WITH
SCATTERED SHOWERS DOTS THE AREA ESPECIALLY OVER THE SW CARIBBEAN
AND CENTRAL AMERICA FROM PANAMA TO HONDURAS. SCATTERED SHOWERS
ARE ALSO NOTED OVER THE HIGHER ELEVATIONS OF PUERTO
RICO...HISPANIOLA...AND JAMAICA. IN THE UPPER LEVELS...A RIDGE
IS OVER THE WESTERN CARIBBEAN W OF 80W. ZONAL FLOW COVERS THE
REMAINDER OF THE AREA. STRONG SUBSIDENCE COVERS THE ENTIRE AREA.
EXPECT LITTLE CHANGE OVER THE NEXT 24 HOURS.

ATLANTIC OCEAN...
A 1025 MB HIGH IS LOCATED N OF THE BAHAMAS NEAR 28N76W. BROKEN
TO OVERCAST LOW CLOUD IS LOCATED N OF 20N BETWEEN 60W-72W. A
1000 MB GALE LOW IS CENTERED OVER THE CENTRAL ATLC NEAR 28N45W.
AN OCCLUDED FRONT EXTENDS E FROM THE LOW ALONG 30N46W 31N42W
28N38W. A COLD FRONT CONTINUES TO THE TROPICS ALONG 23N40W
8N54W. SCATTERED SHOWERS ARE WITHIN 60NM OF THE FRONTS. A POST
FRONTAL TROUGH EXTENDS S OF THE LOW ALONG 26N43W 19N50W. A 1026
MB HIGH IS OFF THE COAST OF PORTUGAL NEAR 42N15W. A RIDGE AXIS
EXTENDS S TO BEYOND THE CAPE VERDE ISLANDS TO 13N30W. IN THE
UPPER LEVELS...NELY FLOW IS OVER THE WESTERN ATLC N OF 20N W OF
60W. AN UPPER LEVEL TROUGH IS OVER THE CENTRAL ATLC N OF 20N
BETWEEN 40W-60W. AN UPPER LEVEL RIDGE IS OVER THE ERN ATLC N OF
20N BETWEEN 20W-40W. AN UPPER LEVEL HIGH IS CENTERED OFF THE
COAST OF WEST AFRICA NEAR 8N13W. A RIDGE AXIS EXTENDS W TO
VENEZUELA ALONG 8N. EXPECT THE GALE LOW TO MOVE NE AND OUT OF
THE AREA WITHIN 24 HOURS.

$$
FORMOSA/WALTON






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