000
AXNT20 KNHC 231729
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
105 PM EST TUE NOV 23 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 1715 UTC.

...THE ITCZ...
 
THE ITCZ AXIS IS CENTERED ALONG 8N13W 6N25W 7N35W 4N52W. 
ISOLATED MODERATE CONVECTION IS ALONG THE COAST OF W AFRICA FROM 
4N-9N BETWEEN 12W-18W. WIDELY SCATTERED MODERATE CONVECTION IS 
FROM 1N-10N BETWEEN 20W-38W. A SURFACE TROUGH IS N OF THE ITCZ 
FROM 14N55W TO 6N59W WITH SCATTERED MODERATE CONVECTION W OF THE 
TROUGH AXIS FROM 8N-12N BETWEEN 56W-61W. 

...DISCUSSION...

THE GULF OF MEXICO...
SURFACE RIDGING IS PRODUCING 5-10 KT SE FLOW OVER THE GULF OF 
MEXICO. SCATTERED SHOWERS ARE OVER THE SE GULF OF MEXICO AN D 
THE STRAITS OF FLORIDA S OF 26N E OF 87W. FAIR WEATHER PREVAILS 
OVER THE REMAINDER OF THE GULF. IN THE UPPER LEVELS...RIDGING IS 
ALSO OVER THE GULF WITH AXIS FROM N FLORIDA TO THE YUCATAN 
PENINSULA. STRONG SUBSIDENCE COVERS THE ENTIRE GULF. EXPECT 
WITHIN THE NEXT 24 HOURS FOR SCATTERED SHOWERS OVER THE YUCATAN 
PENINSULA AND BAY OF CAMPECHE S OF 22N.
 
THE CARIBBEAN SEA...
A SURFACE TROUGH IS OVER THE SW CARIBBEAN FROM NE NICARAGUA AT 
15N83W TO PANAMA AT 8N80W. SCATTERED MODERATE CONVECTION IS FROM 
8N-12N BETWEEN 76W-84W. 15-25 KT TRADE WINDS COVER THE ENTIRE 
CARIBBEAN SEA WITH THE STRONGEST WINDS S OF HISPANIOLA. 
SCATTERED SHOWERS ARE NOTED OVER THE LEEWARD ISLANDS...PUERTO 
RICO...AND HISPANIOLA N OF 15N BETWEEN 60W-70W. SCATTERED 
SHOWERS ARE ALSO OVER THE WINDWARD ISLANDS S OF 15N E OF 65W DUE 
TO AN APPROACHING SURFACE TROUGH. 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 13N...PRODUCING BROKEN HIGH CLOUDS. EXPECT OVER THE NEXT 24 
HOURS FOR ADDITIONAL SHOWERS TO BE OVER THE SRN CARIBBEAN S OF 
16N.

THE ATLANTIC OCEAN...
A 1024 MB HIGH IS CENTERED OVER THE W ATLANTIC NEAR 34N63W. 
SCATTERED SHOWERS ARE OVER THE W ATLANTIC AND THE BAHAMAS W OF 
67W. THE TAIL END OF A COLD FRONT IS OVER THE CENTRAL ATLANTIC 
FROM 32N36W TO 26N45W. SCATTERED SHOWERS ARE WITHIN 30 NM OF 
THE FRONT. A STATIONARY FRONT IS OVER THE ERN ATLANTIC FROM 
32N23W TO 27N35W TO A 1008 MB LOW AT 23N37W. A STATIONARY FRONT 
CONTINUES SW FROM THE LOW TO 18N43W. SCATTERED SHOWERS ARE 
WITHIN 90 NM OF THE FRONT. IN THE UPPER LEVELS...AN UPPER LEVEL 
RIDGE IS OVER THE W ATLANTIC N OF 20N W OF 70W. AN UPPER LEVEL 
TROUGH IS N OF 20N BETWEEN 30W-70W WITH AXIS ALONG 50W. THIS 
TROUGH IS SUPPORTING THE SURFACE LOW AND FRONTS. EXPECT OVER THE 
NEXT 24 HOURS...FOR THE SURFACE LOW TO MOVE NE TO NEAR 32N28W 
WITH SHOWERS. 

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

$$
FORMOSA