000
AXNT20 KNHC 060550
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
105 AM EST SAT MAR 06 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 
0545 UTC.

...ITCZ...

THE ITCZ AXIS IS LOCATED FROM THE CENTRAL COAST OF LIBERIA NEAR 
6N10W WESTWARD ALONG 3.5N20W 1N30W 2N40W TO THE NORTHEAST BRAZIL 
COAST NEAR 2N50W. SCATTERED MODERATE CONVECTION IS ALONG THE 
ITCZ FROM THE CENTRAL COAST OF LIBERIA TO 25W. 

...DISCUSSION...

GULF OF MEXICO...
A STRONG AND ELONGATED SURFACE HIGH PRESSURE CROSSES THE CENTRAL 
CONUS FROM NORTH TO SOUTH...FROM THE GREAT LAKES TO THE NORTHERN 
GULF OF MEXICO. THIS FEATURE CONTINUES TO HAVE A STRONG 
INFLUENCE OVER MUCH OF THE GULF...SUPPORTED BY AN UPPER LEVEL 
RIDGE BRINGING SUBSIDENT DRY AIR ALOFT. MARINE OBSERVATIONS SHOW 
ANTICYCLONIC FLOW ACROSS THE REGION. VISIBLE SATELLITE IMAGERY 
INDICATES AN AREA OF RELATIVELY LOW CLOUDS WITH POSSIBLE 
FOG/DRIZZLE OVER THE WESTERN GULF...WEST OF 93W. COMPUTER MODELS 
FORECAST FAIR WEATHER CONDITIONS ACROSS THE BASIN CONTINUING 
THROUGH THE WEEKEND...AS THE NEXT DEVELOPING AREA OF LOW 
PRESSURE AND ASSOCIATED COLD FRONT ARE EXPECTED TO IMPACT THE 
NORTHWEST GULF WATERS EARLY NEXT WEEK.

CARIBBEAN SEA...
A STATIONARY FRONT ENTERS THE DISCUSSION AREA THROUGH THE ISLAND 
OF PUERTO RICO...EXTENDING SOUTHWESTWARD ACROSS THE CENTRAL 
CARIBBEAN...BECOMING A TROUGH THAT CONTINUES TO THE NORTH 
CENTRAL COAST OF COLOMBIA ALONG 18N66W 15N72W 11N75W. THIS 
FRONTAL BOUNDARY...ALONG WITH THE SUPPORTING UPPER LEVEL TROUGH 
THAT IS SWINGING ACROSS HISPANIOLA AND PUERTO RICO...IS 
ENHANCING THE SURFACE CONVERGENCE OVER THESE TWO ISLANDS NORTH 
OF 16N. THEREFORE...OVERCAST SKIES WITH SCATTER SHOWERS COVER 
THE ENTIRE HISPANIOLA AND PUERTO RICO...AS SEEN ON SATELLITE 
INFRA-RED AND RADAR IMAGERY. ALSO...SCATTER SHOWERS ARE OVER THE 
SOUTH CENTRAL BASIN FROM 9N TO 16N BETWEEN 75W AND 80W. THIS 
AREA OF SHOWERS ARE MORE RELATED TO SURFACE CONVERGING 
WINDS...EXPECTED TO WEAKEN OVER THE NEXT 24 HOURS. ELSEWHERE 
ACROSS THE CARIBBEAN SEA...GENERALLY FAIR WEATHER CONTINUES 
UNDER THE INFLUENCE OF AN UPPER LEVEL RIDGE.

ATLANTIC OCEAN...
A STATIONARY FRONT ENTERS THE DISCUSSION AREA THROUGH THE 
CENTRAL ATLANTIC NEAR 32N42W AND EXTENDS SOUTHWEST ALONG 27N50W 
21N60W ENTERING THE CARIBBEAN SEA THROUGH THE ISLAND OF PUERTO 
RICO. SATELLITE INFRA-RED DATA SHOWS MODERATE CONVECTION WITHIN 
350 NM WEST OF THE STATIONARY FRONT NORTH OF 26N. WEAK 
CONVECTION IS WITHIN 200 NM WEST OF THE STATIONARY FRONT SOUTH 
OF 26N. THIS FRONT IS SUPPORTED BY A SLOW MOVING UPPER LEVEL 
LONGWAVE WITH AXIS FROM 40N40W TO 20N70W. ELSEWHERE ACROSS THE 
DISCUSSION AREA...A SURFACE 1020 MB HIGH PRESSURE NEAR 26N33W 
CONTINUES TO BRING FAIR WEATHER TO THE CENTRAL AND EASTERN 
ATLANTIC. DRY AND CALM CONDITIONS ARE SEEN ACROSS THE CENTRAL 
AND EAST ATLANTIC...EAST OF 43W. THE FAR WESTERN ATLANTIC IS 
ALSO EXPERIENCING FAIR WEATHER CONDITIONS WEST OF 65W. LOOK FOR 
THE CENTRAL ATLANTIC STATIONARY FRONT TO CONTINUE TO SLOWLY 
DRIFT EASTWARD WITH CONVECTION OVER THE NEXT 24 HOURS.

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

$$

GARCIA