000
AXNT20 KNHC 251044
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
805 AM EDT TUE MAY 25 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 1015 UTC...

...SPECIAL FEATURE...

DEEP LAYER CYCLONIC FLOW FROM A TROUGH COVERS THE ATLANTIC OCEAN 
TO THE WEST OF 60W. SOME OF THE CYCLONIC FLOW EVEN REACHES INTO 
THE NORTHWESTERN CORNER AND NORTH CENTRAL SECTIONS OF THE 
CARIBBEAN SEA..TO THE NORTHWEST OF THE LINE FROM THE WINDWARD 
PASSAGE TO NORTHERN HONDURAS. A 1006 MB LOW PRESSURE CENTER IS 
NEAR 30N72W. A 1007 MB LOW PRESSURE CENTER IS NEAR 29N70W.
THE 24 HOUR FORECAST IS FOR THE 29N70W LOW CENTER TO 
DISSIPATE...AND THE 1006 MB LOW PRESSURE CENTER WILL DRIFT 
NORTHWESTWARD. SHOWERS AND THUNDERSTORMS ARE FROM 20N TO 25N 
BETWEEN 55W AND 58W. BROKEN TO OVERCAST MULTILAYERED CLOUDS ARE 
MOVING NORTHEASTWARD...FROM 20N TO 26N BETWEEN 60W AND 70W.
BROKEN TO OVERCAST MULTILAYERED CLOUDS AND POSSIBLE PRECIPITATION
ARE WITHIN 90 NM ON EITHER SIDE OF 26N54W 30N60W BEYOND 32N64W.
THE WIND CONDITIONS IN THE AREA OF THIS BULLETIN ARE LESS
THAN GALE-FORCE AT 25/0600 UTC. GALE-FORCE WIND CONDITIONS ARE
BEING EXPERIENCED IN THE ATLANTIC WATERS TO THE NORTH OF THE 
BOUNDARY OF THIS BULLETIN.

...TROPICAL WAVES...

AN ATLANTIC OCEAN TROPICAL WAVE IS ALONG 22W/23W TO THE SOUTH OF 
10N MOVING WESTWARD 10 KT. SHOWERS FROM 5N TO 8N BETWEEN 20W AND 
24W ARE IN THE ITCZ.

AN ATLANTIC OCEAN TROPICAL WAVE IS ALONG 37W/38W TO THE SOUTH OF 
10N MOVING WESTWARD 10 KT. SHOWERS AND POSSIBLE THUNDERSTORMS
FROM 2N TO 5N BETWEEN 34W AND 41W ARE IN THE ITCZ.

AN ATLANTIC OCEAN TROPICAL WAVE IS ALONG ALONG 55W TO THE SOUTH 
OF 9N INTO SURINAME MOVING WESTWARD 10 KT. IT APPEARS THAT THE 
WAY HAS BEEN MOVING AWAY FROM AREAS WHERE ITCZ PRECIPITATION
HAS BEEN PERSISTING.

...THE ITCZ...

FROM THE SIERRA LEONE COAST NEAR 9N13W TO 4N39W INTO 
NORTHEASTERN BRAZIL NEAR 2N51W. ISOLATED TO WIDELY SCATTERED
MODERATE SHOWERS TO LOCALLY STRONG THUNDERSTORMS ARE FROM
2N TO 10N BETWEEN AFRICA AND 56W.

...DISCUSSION...

THE GULF OF MEXICO...
AN UPPER LEVEL TROUGH IS DIGGING SOUTHEASTWARD TO THE MIDDLE OF 
BAJA CALIFORNIA. UPPER LEVEL CYCLONIC FLOW MOVES NORTHEASTWARD
AND IT COVERS PARTS OF THE NORTHERN HALF OF MEXICO...BEYOND THE 
FAR WEST TEXAS AND THE TEXAS PANHANDLE. MIDDLE LEVEL TO UPPER 
LEVEL ANTICYCLONIC FLOW COVERS THE REST OF MEXICO...AND INTO THE 
GULF OF MEXICO TO THE WEST OF 90W. MIDDLE LEVEL TO UPPER LEVEL
NORTHWESTERLY WINDS COVER THE GULF OF MEXICO TO THE EAST OF 90W.
THIS IS A COMBINATION OF THE RIDGE IN MEXICO WITH THE FLOW 
AROUND A DEEP LAYER WESTERN ATLANTIC OCEAN TROUGH. A 1015 MB
HIGH PRESSURE CENTER IS NEAR 28N90W. A SURFACE TROUGH GOES FROM
28N88W INTO THE WESTERN FLORIDA PANHANDLE.

THE CARIBBEAN SEA...
THE BASE OF A MIDDLE LEVEL TO UPPER LEVEL TROUGH DIPS INTO THE 
AREA NEAR THE GULF OF HONDURAS AND NORTHERN HONDURAS...TOWARD
GUATEMALA AND EL SALVADOR. STRONG SHOWERS AND THUNDERSTORMS ARE 
ALONG THE EASTERN PACIFIC OCEAN COAST OF MEXICO BETWEEN 
GUATEMALA AND THE GULF OF TEHUANTEPEC...AND ALONG THE EL SALVADOR
COAST. A SURFACE TROUGH ALSO RUNS FROM ONE END OF MEXICO TO THE 
OTHER ONE...EVENTUALLY REACHING WESTERN GUATEMALA. SHOWERS AND 
THUNDERSTORMS ARE IN THE NORTH CENTRAL CARIBBEAN SEA WATERS FROM 
16N TO SOUTHERN HISPANIOLA BETWEEN 70W AND 74W...IN BROAD 
SURFACE LOW PRESSURE. STRONG SHOWERS AND THUNDERSTORMS THAT WERE
IN COLOMBIA AND NORTHWESTERN VENEZUELA SIX HOURS AGO NOW ARE 
CONFINED TO THE AREA OF LAKE MARACAIBO OF NORTHWESTERN 
VENEZUELA. 

THE ATLANTIC OCEAN...
ONE UPPER LEVEL TROUGH GOES THROUGH 32N34W TO 18N28W.
NO PRECIPITATION IS DISCERNIBLE WITH THIS TROUGH.
BROAD SURFACE ANTICYCLONIC FLOW COVERS THE AREA
TO THE NORTH OF 10N BETWEEN AFRICA AND 60W.

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

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MT