000
AXNT20 KNHC 260000
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
705 PM EST THU NOV 25 2010

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.

...THE ITCZ...
 
THE ITCZ AXIS IS CENTERED ALONG 7N13W 4N20W 3N30W 3N40W 4N52W.  
WIDELY SCATTERED MODERATE CONVECTION IS ALONG THE COAST OF W 
AFRICA FROM 4N-6N BETWEEN 7W-10W. SIMILAR CONVECTION IS FROM 
2N-6N BETWEEN 14W-20W. ISOLATED MODERATE CONVECTION IS FROM 
1N-7N BETWEEN 26W-30W...AND FROM 2N-8N BETWEEN 35W-39W. A 
SURFACE TROUGH IS N OF THE ITCZ FROM 6N46W TO 13N43W. SCATTERED 
MODERATE CONVECTION IS FROM 10N-12N BETWEEN 37W-46W. ANOTHER 
SURFACE TROUGH IS NEAR TRINIDAD FROM 7N62W TO 12N59W. SCATTERED 
MODERATE CONVECTION IS FROM 6N-9N BETWEEN 58W-62W.  

...DISCUSSION...

GULF OF MEXICO...
SURFACE RIDGING IS PRODUCING 10-15 KT SE FLOW OVER THE GULF OF 
MEXICO. SCATTERED SHOWERS ARE OVER THE E GULF OF MEXICO AND THE 
STRAITS OF FLORIDA E OF 89W. FAIR WEATHER PREVAILS OVER THE W 
GULF. PREFRONTAL SHOWERS ARE ALSO OVER INLAND SE TEXAS. IN THE 
UPPER LEVELS...RIDGING IS OVER THE GULF WITH AXIS ALONG 83W. 
STRONG SUBSIDENCE COVERS THE ENTIRE GULF. EXPECT A COLD FRONT TO 
BE OVER THE NW GULF TONIGHT...AND EXTEND FROM THE FLORIDA 
PANHANDLE TO VERACRUZ MEXICO IN 24 HOURS WITH SHOWERS. 

CARIBBEAN SEA...
A SURFACE TROUGH IS OVER THE SW CARIBBEAN OFF THE COAST OF 
NICARAGUA FROM 10N82W TO 16N81W. WIDELY SCATTERED MODERATE 
CONVECTION IS FROM 8N-15N BETWEEN 79W-85W. ANOTHER SURFACE 
TROUGH IS NEAR TRINIDAD PRODUCING CONVECTION. SEE THE ITCZ 
SECTION. 15-25 KT TRADE WINDS COVER THE ENTIRE CARIBBEAN SEA 
WITH THE STRONGEST WINDS S OF HISPANIOLA. SCATTERED SHOWERS ARE 
NOTED OVER THE SE CARIBBEAN N OF VENEZUELA. MOSTLY FAIR WEATHER 
IS OVER THE N CARIBBEAN N OF 15N. IN THE UPPER LEVELS...A RIDGE 
IS OVER THE W CARIBBEAN W OF 80W PRODUCING NW UPPER LEVEL WINDS. 
ZONAL FLOW IS OVER THE E CARIBBEAN. SIGNIFICANT UPPER LEVEL 
MOISTURE IS OVER S AMERICA...SW CARIBBEAN...AND CENTRAL AMERICA 
S OF 14N...PRODUCING BROKEN HIGH CLOUDS. EXPECT OVER THE NEXT 24 
HOURS FOR ADDITIONAL SHOWERS TO BE OVER THE SRN CARIBBEAN S OF 
15N...AND OVER THE NW CARIBBEAN W OF 80W.  
 
ATLANTIC OCEAN...
A 1022 MB HIGH IS CENTERED OVER THE W ATLANTIC NEAR 33N73W.  
SCATTERED SHOWERS ARE OVER THE W ATLANTIC AND THE BAHAMAS W OF 
77W. A COLD FRONT ENTERS THE CENTRAL ATLANTIC NEAR 32N46W AND 
EXTENDS SW TO THE W ATLANTIC ALONG 26N55W 26N70W. SCATTERED 
MODERATE CONVECTION IS OVER THE CENTRAL ATLANTIC FROM 29N-34N 
BETWEEN 40W-48W. SCATTERED SHOWERS ARE WITHIN 30 NM OF THE 
REMAINDER OF THE FRONT. A SURFACE TROUGH IS ALSO OVER THE 
CENTRAL ATLANTIC FROM 22N58W TO 26N48W. SCATTERED SHOWERS ARE 
WITHIN 30 NM OF THE TROUGH. A 1017 MB HIGH IS OVER THE E 
ATLANTIC NEAR 24N38W PRODUCING FAIR WEATHER. THE TAIL END OF A 
COLD FRONT IS OVER THE CANARY ISLANDS FROM 32N17W TO 25N20W.  
SCATTERED SHOWERS ARE WITHIN 30 NM OF THE FRONT. IN THE UPPER 
LEVELS...AN UPPER LEVEL RIDGE IS OVER THE W ATLANTIC N OF 20N W 
OF 60W. ZONAL FLOW IS N OF 20N E OF 60W. AN UPPER LEVEL HIGH IS 
CENTERED E OFF THE COAST OF W AFRICA NEAR 10N20W. EXPECT OVER 
THE NEXT 24 HOURS...FOR THE CENTRAL ATLANTIC COLD FRONT TO MOVE 
E TO 32N35W WITH SHOWERS.  

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
FORMOSA