000
AXNT20 KNHC 070557
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
205 AM EDT WED APR 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...

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 7N12W 3N22W 2N35W AND INTO NE BRAZIL 
NEAR 1N50W. ISOLATED MODERATE CONVECTION IS FROM THE EQUATOR TO 
3N BETWEEN 39W-50W. 

...DISCUSSION...

GULF OF MEXICO...
A SURFACE RIDGE EXTENDS OVER THE FLORIDA PENINSULA AND GULF FROM 
A 1023 MB HIGH CENTERED IN THE W ATLC NEAR 30N70W. THE RIDGE IS 
PROVIDING MOST OF THE GULF WITH SE SURFACE WINDS UP TO 20 KT AND 
OVERALL CLEAR SKIES THROUGH THE OVERNIGHT HOURS. AN UPPER LEVEL 
RIDGE AXIS EXTENDS FROM THE YUCATAN PENINSULA NE OVER THE 
FLORIDA PENINSULA AND ALONG THE SE CONUS SEABOARD TO BEYOND 
32N80W AND CONTINUES TO ENHANCE THE SURFACE RIDGE WITH STRONG 
SUBSIDENCE AND DRY STABLE AIR IN THE MIDDLE TO UPPER LEVELS OF 
THE ATMOSPHERE ACROSS THE ENTIRE GULF. AS THE SURFACE RIDGE 
SLIDES EASTWARD OVER THE NEXT 24 HOURS...A STRONG COLD FRONT IS 
FORECAST TO MOVE OFF THE TEXAS GULF COAST LATE WEDNESDAY AND 
PROVIDE THE NW GULF WITH ANOTHER ROUND OF STRONG NORTHERLY WINDS 
WEST OF THE FRONT.  

CARIBBEAN SEA...
A SURFACE RIDGE ANCHORED OVER THE W ATLC IS PROVIDING THE 
CARIBBEAN SEA WITH MODERATE TO STRONG NE TO E TRADE WINDS. UPPER 
LEVEL RIDGING COVERS THE NW CARIBBEAN WHILE WEAK UPPER LEVEL 
TROUGHING EXTENDS FROM THE TURKS AND CAICOS ISLANDS ACROSS 
EASTERN CUBA TO EASTERN HONDURAS. THIS UPPER LEVEL TROUGH AXIS 
IS PROVIDING FOR INCREASED MOISTURE CONVERGENCE ACROSS THE 
SOUTHERN CARIBBEAN WITH POSSIBLE ISOLATED SHOWERS S OF 14N 
BETWEEN 60W-75W...ALSO INCLUDING THE LESSER ANTILLES S OF 18N 
BETWEEN 60W-65W. ELSEWHERE...MODERATE TO STRONG SUBSIDENCE AND 
DRY STABLE AIR ALOFT COVERS THE REMAINDER OF THE BASIN.

ATLANTIC OCEAN...
A SURFACE RIDGE COVERS THE W ATLC W OF 45W ACROSS THE FLORIDA 
PENINSULA AND INTO THE GULF OF MEXICO ANCHORED BY A 1023 MB HIGH 
CENTERED NEAR 30N70W PROVIDING GENERALLY FAIR WEATHER ACROSS THE 
W ATLC. A DEEP LAYERED TROUGH REMAINS OVER THE CENTRAL ATLC WITH 
AN UPPER LEVEL LOW CENTERED NEAR 34N38W THAT SUPPORTS A 1005 MB 
SURFACE LOW NEAR 34N40W. A SURFACE TROUGH EXTENDS FROM EAST OF 
THE LOW ALONG 32N34W 23N40W TO 14N58W WITH WIDELY SCATTERED 
SHOWERS WITHIN 150 NM E OF THE BOUNDARY N OF 20N AND WITHIN 150 
NM W OF THE BOUNDARY S OF 20N. A SECONDARY UPPER LEVEL SHORTWAVE 
TROUGH FOLLOWS WEST OF THE UPPER LOW WITH AXIS ALONG 33N50W TO 
28N58W THAT SUPPORTS ANOTHER SURFACE TROUGH ANALYZED FROM THE 
SURFACE LOW TO 28N46W. ELSEWHERE EAST OF THE CENTRAL ATLC 
SURFACE TROUGH...A SURFACE RIDGE AXIS EXTENDS FROM A 1023 MB 
HIGH CENTERED NW OF THE MADEIRA ISLANDS NEAR 33N19W TO 17N34W 
AND CONTINUES TO PROVIDE THE EASTERN ATLC WITH NE WINDS AND 
OVERALL FAIR WEATHER. 

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

$$
HUFFMAN