000
AXNT20 KNHC 270006
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
705 PM EST TUE DEC 26 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...
ITCZ AXIS IS CENTERED ALONG 5N8W 4N30W EQ50W.  SCATTERED SHOWERS 
ARE OFF THE COAST OF W AFRICA FROM 3N-7N BETWEEN 12W-17W.  
SIMILAR SHOWERS ARE ALONG THE COAST OF SOUTH AMERICA FROM EQ-2N 
BETWEEN 48W-50W.  

...DISCUSSION...
THE GULF OF MEXICO...
A COLD FRONT EXTENDS FROM S FLORIDA TO THE YUCATAN PENINSULA 
ALONG 26N80W 23N86W MOVING E.  IT IS A SECONDARY SURGE OF COLDER 
AIR WITH A WIND SHIFT AND SCATTERED SHOWERS THAT TRAILS THE 
OTHER COLD FRONT PRESENTLY OVER THE BAHAMAS AND CENTRAL CUBA.  
OVERCAST COLD AIR STRATOCUMULUS CLOUDS COVERS THE E GULF OF 
MEXICO E OF 92W.  20-30 KT NW WINDS DOMINATES MOST OF THE GULF 
OF MEXICO BEHIND THE FRONT.  IN THE UPPER LEVELS... THE BASE OF 
AN UPPER LEVEL TROUGH IS OVER N MEXICO AND TEXAS PRODUCING 
MAINLY SWLY FLOW AND STRONG SUBSIDENCE OVER THE ENTIRE GULF OF 
MEXICO EXCEPT IN THE VICINITY OF THE FRONT.  A 110 KT JETSTREAM 
EXTENDS FROM THE YUCATAN PENINSULA TO N FLORIDA.  EXPECT... THE 
COLD FRONT TO EXIT FLORIDA AND BE OVER THE BAHAMAS AND CENTRAL 
CUBA WITH CONVECTION BY WEDNESDAY EVENING.    

THE CARIBBEAN SEA...
COLD FRONT EXTENDS FROM CENTRAL CUBA TO SRN NICARAGUA ALONG 
22N78W 12N84W. SCATTERED SHOWERS ARE WITHIN 60 NM OF THE FRONT.  
SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS OVER PANAMA 
FROM 6N-9N BETWEEN 75W-82W.  ISOLATED SHOWERS ARE OVER THE E 
CARIBBEAN E OF 72W.  SAN JUAN RADAR SHOWS ISOLATED SHOWERS S OF 
PUERTO RICO.  IN THE UPPER LEVELS... A RIDGE IS OVER THE W 
CARIBBEAN BETWEEN 70W-80W.  A SMALL CYCLONIC CIRCULATION IS OVER 
THE E CARIBBEAN CENTERED NEAR 14N68W.  EXTREMELY DRY SUBSIDENCE 
COVERS THE CARIBBEAN SEA 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 TO CENTRAL CUBA ALONG 32N71W 
22N78W.  A SECONDARY COLD FRONT IS ALONG THE COAST OF FLORIDA 
ALONG 32N75W 26N80W. OVERCAST COLD AIR STRATOCUMULUS CLOUDS AND 
SCATTERED SHOWERS ARE W OF BOTH FRONTS.  A 1022 MB HIGH IS OVER 
THE CENTRAL ATLANTIC NEAR 27N55W.  THE TAIL END OF A COLD FRONT 
IS OVER THE E ATLANTIC ALONG 32N30W 30N33W 28N45W.  SCATTERED 
SHOWERS ARE WITHIN 90 NM OF THE FRONT.  IN THE UPPER LEVELS... A 
LARGE ANTICYCLONIC CIRCULATION IS CENTERED OVER THE W ATLANTIC 
NEAR 25N60W.  ANTICYCLONIC FLOW IS N OF 18N BETWEEN 40W-80W.  A 
TROUGH IS OVER THE E ATLANTIC N OF 15N E OF 40W.  A SUBTROPICAL 
JETSTREAM IS OVER THE E ATLANTIC AND W AFRICA ALONG 10N33W TO 
BEYOND 21N10W PRODUCING BROKEN HIGH CLOUDS.  

$$
FORMOSA