[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 272338
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
705 PM EST WED DEC 27 2006

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...
CENTRAL AMERICA...THE GULF OF MEXICO...THE CARIBBEAN SEA...
NORTHEASTERN SECTIONS OF SOUTH AMERICA...AND THE 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.

...THE ITCZ...
THE ITCZ IS CENTERED ALONG

...DISCUSSION...
THE GULF OF MEXICO...
A 1025 MB HIGH IS CENTERED OVER N ALABAMA NEAR 34N86W.  10 KT
ELY SURFACE WINDS DOMINATES THE GULF OF MEXICO.  BROKEN TO
OVERCAST LOW CLOUDS ARE OVER THE GULF E OF 93W.  IN THE UPPER
LEVELS... THE BASE OF AN UPPER LEVEL TROUGH IS OVER THE GULF
PRODUCING MAINLY WLY FLOW AND STRONG SUBSIDENCE.  EXPECT...
10-15 KT SELY SURFACE WINDS AND FAIR WEATHER DUE TO HIGH
PRESSURE RETURN FLOW BY THURSDAY EVENING.

THE CARIBBEAN SEA...
COLD FRONT EXTENDS FROM E CUBA TO THE SW CARIBBEAN SEA ALONG
21N76W 12N81W.  SCATTERED SHOWERS ARE WITHIN 60 NM OF THE FRONT.
BROKEN TO OVERCAST LOW CLOUDS ARE BEHIND THE FRONT OVER THE NW
CARIBBEAN...NICARAGUA...AND HONDURAS.  FURTHER S... ISOLATED
MODERATE CONVECTION IS OVER N COLOMBIA AND PANAMA FROM 7N-10N
BETWEEN 72W-84W. IN THE UPPER LEVELS... MOSTLY WLY ZONAL FLOW IS
NOTED OVER THE CARIBBEAN SEA.  DRY SUBSIDENCE DOMINATES EXCEPT
IN VICINITY OF THE COLD FRONT.  EXPECT...SHOWERS OVER CENTRAL
AMERICA AND THE W CARIBBEAN SEA OVER THE NEXT 24 HOURS.

THE ATLANTIC OCEAN...
A COLD FRONT IS OVER THE W ATLANTIC FROM 32N64W TO E CUBA NEAR
21N76W.  SCATTERED SHOWERS ARE WITHIN 60 NM OF THE FRONT. BROKEN
TO OVERCAST LOW CLOUDS ARE BEHIND THE FRONT TO THE FLORIDA
COAST.  A 1024 MB HIGH IS OVER THE CENTRAL ATLANTIC NEAR
29N41W.  THE TAIL END OF A COLD FRONT IS OVER THE E ATLANTIC
ALONG 32N20W 28N27W 26N34W.  SCATTERED SHOWERS ARE WITHIN 90 NM
OF THE FRONT.  IN THE UPPER LEVELS... SWLY FLOW IS OVER THE W
ATLANTIC N OF 20N BETWEEN 70W-80W.  A LARGE ANTICYCLONIC
CIRCULATION IS CENTERED OVER THE CENTRAL ATLANTIC NEAR 25N50W.
ANTICYCLONIC FLOW IS N OF 18N BETWEEN 30W-70W.  A TROUGH IS OVER
THE E ATLANTIC N OF 10N E OF 30W.  A TROPICAL JETSTREAM IS
OVER THE E ATLANTIC AND W AFRICA ALONG 6N40W TO BEYOND 20N15W
PRODUCING BROKEN HIGH CLOUDS ESPECIALLY OVER THE CAPE VERDE
ISLANDS.

$$
FORMOSA


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