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Atlantic Tropical Weather Discussion (Text)



000
AXNT20 KNHC 302322
TWDAT 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
805 PM EDT MON MAR 30 2015

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...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL 
ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2315 UTC.

...ITCZ/MONSOON TROUGH... 

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL 
ATLANTIC NEAR 05N09W TO 00N16W TO 02S27W WHERE THE ITCZ BEGINS 
AND CONTINUES TO THE COAST OF SOUTH AMERICA NEAR 05S37W. 
ISOLATED MODERATE CONVECTION IS FROM 3N-3S BETWEEN 11W-19W.

...DISCUSSION...

GULF OF MEXICO...

A BROAD AREA OF HIGH PRESSURE CONTINUES BUILDING ACROSS THE SE 
CONUS AND EXTENDING ACROSS THE BASIN. A 1026 MB SURFACE HIGH IS 
CENTERED NEAR 28N86W. THESE FEATURES SUPPORT A SLIGHT TO GENTLE 
ANTICYCLONIC FLOW ACROSS THE AREA AS NOTICED IN SCATTEROMETER 
DATA...WITH WEAKER FLOW PREVAILING OVER THE NORTHERN HALF OF THE 
GULF MAINLY N OF 25N. FAIR WEATHER PREVAILS ACROSS THE WHOLE 
BASIN. EXPECT SIMILAR WEATHER CONDITIONS OVER THE NEXT 24 HOURS. 
A FRONTAL BOUNDARY IS EXPECTED TO APPROACH THE NORTHERN HALF OF 
THE BASIN ENHANCING CONVECTION WITHIN THE NEXT 48 HOURS.

CARIBBEAN SEA...

THE TAIL END OF A COLD FRONT EXTENDS FROM THE ATLANTIC ACROSS 
HAITI FROM 20N70W TO 19N74W SUPPORTING ISOLATED CONVECTION 
ACROSS HISPANIOLA AND THE WINDWARD PASSAGE. A SHEAR LINE EXTENDS 
FROM THE END OF THE FRONT TO 16N87W. MODERATE TO FRESH NE WINDS 
ARE DEPICTED IN SCATTEROMETER DATA N OF THE SHEAR LINE WHILE A 
SLIGHT E BREEZE PREVAILS S OF IT. SLIGHT TO GENTLE TRADES 
PREVAIL ACROSS THE REMAINDER OF THE BASIN. TO THE S...A 1011 MB 
LOW IS CENTERED N OF COLOMBIA NEAR 10N76W. SCATTERED MODERATE 
CONVECTION PREVAILS S OF 11N BETWEEN 75W-78W. AN UPPER-LEVEL 
ANTICYCLONE PREVAILS ACROSS THE E CARIBBEAN SUPPORTING 
SUBSIDENCE AND HENCE FAIR WEATHER. OVER THE NEXT 24-48 
HOURS...EXPECT FOR THE SHEAR LINE TO PERSIST WITH CONTINUED 
SHOWERS. SIMILAR WEATHER CONDITIONS WILL PREVAIL ELSEWHERE. 

HISPANIOLA...

SCATTERED MODERATE CONVECTION CONTINUES ACROSS THE ISLAND AS THE 
TAIL END OF A COLD FRONT EXTENDS ACROSS NORTHERN HAITI. EXPECT 
THIS CONVECTION TO PERSIST OVER THE NEXT 24 HOURS. 

ATLANTIC OCEAN... 

A BROAD AREA OF HIGH PRESSURE EXTENDS ACROSS SE CONUS...THE GULF 
OF MEXICO AND THE W ATLANTIC SUPPORTING FAIR WEATHER. A 1026 MB 
SURFACE HIGH IS CENTERED NEAR 29N76W. TO THE E...A COLD FRONT 
EXTENDS FROM 1002 MB LOW CENTERED NEAR 38N54W TO 31N54W TO 
20N71W. ISOLATED MODERATE CONVECTION PREVAILS ALONG THIS 
BOUNDARY. A SURFACE TROUGH AND EXTENDS FROM 27N41W TO 19N40W 
WITH A WEAK SURFACE LOW CENTERED NEAR 22N39W. THESE FEATURES ARE 
THE REFLECTION OF AN UPPER-LEVEL LOW THAT IS BEGINNING TO WEAKEN 
THIS EVENING. A SURFACE RIDGE PREVAILS ACROSS THE E ATLANTIC 
SUPPORTING FAIR WEATHER OVER THE REMAINDER OF THE BASIN. OVER 
THE NEXT 24-48 HOURS...EXPECT FOR A COLD FRONT TO APPROACH THE W 
ATLANTIC FROM EASTERN US WITH CONVECTION. THE FRONTAL BOUNDARY 
OVER THE W/CENTRAL ATLANTIC WILL CONTINUE MOVING E WHILE 
WEAKENING. 

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

$$

ERA

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Page last modified: Monday, 30-Mar-2015 23:22:41 UTC