000
AXNT20 KNHC 070605
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
105 AM EST TUE DEC 07 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 0515 UTC.

...THE ITCZ...
 
FROM THE COAST OF SIERRA LEONE NEAR 8N13W TO 5N23W 7N40W...
INTO EXTREME NORTHEASTERN BRAZIL NEAR 4N51W. SCATTERED MODERATE 
RAINSHOWERS TO ISOLATED STRONG THUNDERSTORMS ARE FROM 3N TO 4N 
BETWEEN 3W AND 5W...FROM 4N TO 5N BETWEEN 8W AND 11W...WITHIN
45 NM ON EITHER SIDE OF 4N14W 3N20W 3N26W. ISOLATED MODERATE
RAINSHOWERS TO LOCALLY STRONG RAINSHOWERS ARE WITHIN 30 NM ON 
EITHER SIDE OF 6N27W 8N34W 10N37W 10N39W 8N43W 6N46W 6N50W.
A SURFACE TROUGH IS ALONG 10N54W 7N56W INTO SURINAME NEAR 4N56W.
ISOLATED MODERATE RAINSHOWERS ARE IN THE ATLANTIC OCEAN TO THE
SOUTH OF 11N BETWEEN 50W AND 60W.

...DISCUSSION...

THE GULF OF MEXICOAND THE ATLANTIC OCEAN TO THE WEST OF 70W...
A MIDDLE LEVEL TO UPPER LEVEL TROUGH PASSES THROUGH 33N75W
IN THE ATLANTIC OCEAN TO 26N86W TO 23N88W IN THE GULF OF MEXICO.
CYCLONIC FLOW COVERS THE GULF OF MEXICO AND THE ATLANTIC OCEAN
TO THE WEST OF 70W. THIS TROUGH SUPPORTS THE COLD FRONT THAT 
PASSES THROUGH 32N56W TO 25N70W...INTO THE BAHAMAS NEAR SAMANA 
CAY/CROOKED ISLAND/LONG CAY TO CUBA ALONG 78W...INTO THE YUCATAN 
PENINSULA ALONG 20N...INTO THE SOUTHWESTERN CORNER OF THE GULF 
OF MEXICO...TO THE NORTHERN ISTHMUS OF TEHUANTEPEC. A STATIONARY
FRONT BANKS AGAINST THE MOUNTAINS OF MEXICO FROM JUST TO THE 
WEST OF THE ISTHMUS OF TEHUANTEPEC TO 26N100W. COLD-AIR 
STRATIFORM CLOUDS ARE TO THE SOUTH OF 28N TO THE EAST OF 80W 
MOVING SOUTHWARD. BROKEN TO OVERCAST LOW LEVEL AND MIDDLE LEVEL 
CLOUDS AND POSSIBLE PRECIPITATION ARE IN THE WATERS AND COASTAL 
PLAINS TO THE SOUTHWEST OF THE LINE FROM 28N97W IN SOUTH TEXAS 
TO 21N90W IN THE YUCATAN PENINSULA. CLOUDS AND POSSIBLE 
RAINSHOWERS ARE WITHIN 30 NM TO 45 NM ON EITHER SIDE OF THE COLD 
FRONT IN THE ATLANTIC OCEAN. COLD-AIR STRATIFORM CLOUDS ARE OVER 
THE WATERS TO THE NORTHWEST OF THE FRONT.

THE CARIBBEAN SEA...
MIDDLE LEVEL TO UPPER LEVEL SOUTHWESTERLY WIND FLOW COVERS THE
AREA THAT IS TO THE EAST OF THE LINE THAT GOES FROM CENTRAL 
COSTA RICA TO HAITI. THE REST OF THE AREA IS COVERED BY LARGE
SCALE WESTERLY FLOW AND DRY AIR IN SUBSIDENCE. RAINSHOWERS ARE
OCCURRING FROM THE VENEZUELA COAST TO 16N BETWEEN 64W AND 71W
IN AN AREA OF THE REMNANT 700 MB INVERTED TROUGH OF 24 HOURS AGO 
AND BROAD SURFACE LOW PRESSURE. A 1009 MB LOW PRESSURE CENTER IS 
IN PANAMA NEAR 9N78W. STRONG RAINSHOWERS AND THUNDERSTORMS ARE 
FROM 9N TO 11N BETWEEN 76W AND 78W.BROKEN MULTILAYERED CLOUDS 
AND RAINSHOWERS ARE ELSEWHERE TO THE SOUTH OF 15N BETWEEN 72W 
AND 80W...IN AN AREA OF A LOW LEVEL TO MIDDLE LEVEL TROUGH.

THE ATLANTIC OCEAN...
BROAD UPPER LEVEL SOUTHWESTERLY WIND FLOW IS TO THE SOUTHEAST OF 
20N62W 24N40W BEYOND 31N17W. THIS SOUTHWESTERLY FLOW MERGES WITH 
THE BROAD MIDDLE LEVEL TO UPPER LEVEL CYCLONIC FLOW THAT HAS 
PERSISTED DURING THE LAST FEW DAYS...TO THE NORTH OF 25N TO THE 
EAST OF 50W. BROAD SURFACE CYCLONIC FLOW COVERS THE AREA TO THE 
NORTH OF 25N TO THE EAST OF 40W.  

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

$$
MT