000
AXPZ20 KNHC 262102
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC MON MAR 26 2012

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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE ITCZ AXIS EXTENDS FROM 10N102W TO 06N120W TO 07N140W. 
SCATTERED MODERATE CONVECTION WAS NOTED WITHIN 90 NM OF AXIS 
BETWEEN 104W AND 128W.

...DISCUSSION...

WEAK SURFACE HIGH PRESSURE...1021 MB IS CENTERED NEAR 27N124W. 
THE PRESSURE GRADIENT BETWEEN THIS FEATURE AND LOWER PRESSURE IN 
THE VICINITY OF THE ITCZ IS RESULTING IN FRESH TRADEWINDS FROM 
08N TO 13N W OF 113W. THIS AREA OF HIGH PRESSURE WILL REMAIN 
OVER THE NEXT COUPLE OF DAYS MAINTAINING THE AREA OF FRESH TO 
STRONG TRADES. SUBSIDING NW SELL PREVAILS OVER MUCH OF THE AREA 
N OF 07N W OF 110W. THE SWELL WILL CONTINUE TO SPREAD 
SOUTHWARD...AND WILL COVER MUCH OF THE AREA S OF 20N W OF 110W 
BY TUE NIGHT. S OF 05N...THE NW SWELL WILL MERGE WITH SW SWELL 
MOVING UP FROM THE SOUTHERN HEMISPHERE. 

A COLD FRONT IS LOCATED JUST NW OF THE AREA. WINDS WILL INCREASE 
OVER THE FAR NW PART OF THE AREA THIS EVENING IN ADVANCE OF THE 
FRONT WHICH WILL MOVE INTO THE AREA DURING THE OVERNIGHT HOURS. 
THE SUPPORTING UPPER LEVEL TROUGH IS LIFTING OUT WHICH WILL 
DECREASE THE PUSH BEHIND THE FRONT...WHILE THE SURFACE RIDGE 
WILL REMAIN IN PLACE. AS A RESULT...THE FRONT WILL SHIFT ONTO 
THE NW PART OF THE AREA...BUT WILL STALL AND DISSIPATE BY WED 
NIGHT. THIS FRONT WILL ALSO USHER IN A NEW SET OF NW 
SWELLS...WITH COMBINED SEAS PEAKING AT 14 FT TUE NIGHT.  

$$
AL