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000
AXNT20 KNHC 262339
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT SUN APR 26 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 FROM THE AFRICAN COAST NEAR 7N12W TO 5N18W. THE INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM 5N18W TO 2N30W TO 1N40W TO THE COAST OF SOUTH AMERICA NEAR 0N50W. WIDELY SCATTERED MODERATE CONVECTION IS FROM 3N-6N BETWEEN 18W-23W...FROM 0N-3N BETWEEN 27W-32W...AND FROM 2N-3S BETWEEN 46W-50W.


...DISCUSSION...

GULF OF MEXICO...

A 999 MB LOW IS CENTERED OVER CENTRAL TEXAS NEAR 33N101W. A COLD FRONT IS FURTHER NW MOVING TOWARDS THE GULF OF MEXICO. 10 KT SE SURFACE FLOW IS OVER THE W GULF W OF 90W WHILE 10 KT SW WINDS ARE OVER THE E GULF. RADAR IMAGERY SHOWS SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS OVER THE N GULF N OF 27N MOVING E. SMOKE AND HAZE IS SEEN HOWEVER OVER THE YUCATAN PENINSULA AND THE SOUTHERN GULF S OF 24N BETWEEN 86W-94W. MOSTLY FAIR WEATHER IS OVER THE REMAINDER OF THE GULF. IN THE UPPER LEVELS...AN UPPER LEVEL RIDGE IS OVER THE GULF WITH AXIS ALONG 90W. EXPECT OVER THE NEXT 24 HOURS FOR THE COLD FRONT TO BE OVER THE NW GULF FROM HOUSTON TEXAS TO BROWNSVILLE TEXAS WITH CONVECTION.

CARIBBEAN SEA...

A 1004 MB LOW IS CENTERED OVER N COLOMBIA NEAR 6N72W. 10-25 KT TRADEWINDS ARE OVER THE CARIBBEAN SEA WITH STRONGEST WINDS ALONG THE COAST OF N COLOMBIA AND WEAKEST WINDS S OF CUBA. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ARE INLAND OVER NW VENEZUELA...AND N COLOMBIA. SCATTERED SHOWERS ARE OVER
..PANAMA...COSTA RICA...AND HISPANIOLA. THE REMAINDER OF THE CARIBBEAN HAS MOSTLY FAIR WEATHER. IN THE UPPER LEVELS...AN UPPER LEVEL HIGH IS CENTERED N OF COLOMBIA AT 13N74W. STRONG SUBSIDENCE COVERS THE ENTIRE CARIBBEAN SEA. EXPECT LITTLE CHANGE OVER THE NEXT 24 HOURS.


...HISPANIOLA...

CURRENTLY SCATTERED SHOWERS ARE OVER HISPANIOLA DUE TO AFTERNOON AND EVENING HEATING. STRONG SUBSIDENCE AND DRY AIR REMAINS ALOFT SUPPRESSING CONVECTION. EXPECT SIMILAR WEATHER OVER THE NEXT 24 HOURS.

ATLANTIC OCEAN...

A SURFACE TROUGH IS OVER THE W ATLANTIC FROM 31N66W TO 28N69W. SCATTERED MODERATE CONVECTION IS NE OF THE TROUGH FROM 30N-33N BETWEEN 60W-65W. A 1023 MB HIGH IS OVER THE E ATLANTIC NEAR 33N26W. A RIDGE AXIS EXTENDS SW FROM THE HIGH TO 20N50W. A 1016 MB LOW IS EMBEDDED OVER THE E ATLANTIC NEAR 28N25W. OF NOTE IN THE UPPER LEVELS...AN UPPER LEVEL RIDGE IS OVER THE W ATLANTIC BETWEEN 60W-80W. ZONAL FLOW IS OVER THE CENTRAL ATLANTIC BETWEEN 45W-60W. AN UPPER LEVEL TROUGH IS OVER THE E ATLANTIC BETWEEN 30W-45W. AN UPPER LEVEL RIDGE IS OVER THE E ATLANTIC N OF 20N E OF 30W. EXPECT IN 24 HOURS FOR A COLD FRONT TO MOVE INTO THE W ATLANTIC AND EXTEND FROM 31N73W TO CENTRAL FLORIDA WITH CONVECTION.

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

$$ FORMOSA

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