000
AXPZ20 KNHC 250337
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC WED MAY 25 2011

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS 
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND 
METEOROLOGICAL ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0245 UTC.
 
...ITCZ...
AXIS EXTENDS FROM 05.5N77W TO 10N90W TO LOW PRES 1010 MB NEAR 
11N99W TO 11.5N107W TO LOW PRES 1012 MB NEAR 07N116W TO 05N121W 
TO 07N128W TO 06N133W TO 06N140W WITH SCATTERED MODERATE TO 
STRONG CONVECTION NOTED WITHIN 60 NM N AND 90 NM S OF AXIS 
BETWEEN 103W AND 106W. SCATTERED MODERATE CONVECTION WAS ALSO 
NOTED WITHIN 90 NM N OF AXIS BETWEEN 111W AND 122W. 

...DISCUSSION...
A COLD FRONT IS LOCATED NW OF THE AREA WITH STRONG HIGH PRESSURE 
1031 MB BUILDING IN ITS WAKE. THE PRESSURE GRADIENT BETWEEN THIS 
HIGH AND LOW PRESSURE OVER THE SW UNITED STATES IS PRODUCING A 
SMALL AREA OF FRESH 20 KT NW WINDS N OF 24N WITHIN 120 NM W OF 
THE BAJA CALIFORNIA COAST. THERE IS ALSO A SMALL AREA OF FRESH 
20 KT TRADE WINDS FROM 10N TO 21N W OF 132W. THE COLD FRONT WILL 
CLIP THE FAR NW PART OF THE AREA WED MORNING BEFORE DISSIPATING 
BY WED NIGHT. NW SWELL GENERATED BEHIND THE FRONT WILL MOVE INTO 
THE FAR NW PART OF THE AREA THU MORNING. 

A RIDGE OF HIGH PRESSURE WILL BUILD E OVER THE AREA OVER THE 
NEXT 24 HOURS...INCREASING THE COVERAGE OF FRESH 20 KT NW WINDS 
OFF THE W COAST OF BAJA CALIFORNIA AND MAINTAINING THE COVERAGE 
OF FRESH 20 KT TRADEWINDS. 

LOW PRES 1010 MB IS CENTERED NEAR 11N99W. SCATTERED MODERATE TO 
STRONG CONVECTION IS NOTED WITHIN 120 NM W SEMICIRCLE. THIS LOW 
IS EXPECTED TO DISSIPATE BY THU NIGHT.

LONG PERIOD S SWELL CURRENTLY AFFECTS THE AREA S OF 08N BETWEEN 
95W AND 122W. THESE SWELLS WILL CONTINUE TO SPREAD FURTHER N AND 
WILL COVER THE AREA S OF 14N BETWEEN 95W AND 133W AND S OF 08N W 
OF 133W BY THURSDAY NIGHT. 

$$
AL