000
AXPZ20 KNHC 080234
TWDEP 

TROPICAL WEATHER DISCUSSION                                      
NWS NATIONAL HURRICANE CENTER MIAMI FL                           
0405 UTC WED MAY 08 2013

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 
0230 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...   
THE MONSOON TROUGH AXIS EXTENDS FROM 04N77W TO 09N102W TO 09N120W 
TO 08N124W WHERE LOW LEVEL WINDS SUGGEST A TRANSITION TO ITCZ 
EXTENDING TO BEYOND 07N140W. SCATTERED MODERATE CONVECTION WAS 
NOTED WITHIN 180 NM S OF AXIS BETWEEN 90W AND 100W. SCATTERED 
MODERATE CONVECTION WAS NOTED WITHIN 180 NM N OF AXIS BETWEEN 
106W AND 113W. 

...DISCUSSION...  

WEAK HIGH PRESSURE IS CENTERED NEAR 25N122W WITH WEAK SURFACE 
RIDGE EXTENDING WSW TO BEYOND 24N140W. THE PRESSURE GRADIENT 
REMAINS WEAK OVER THE MAJORITY OF THE FORECAST AREA. THIS IS 
CREATING RELATIVELY TRANQUIL MARINE CONDITIONS ACROSS THE 
FORECAST AREA...WITH GENTLE WINDS PREVAILING ACROSS MOST OF THE 
AREA AS DEPICTED BY THE LATEST SCATTEROMETER PASS. THE SURFACE 
RIDGE IS CLOSEST TO THE LOWER PRESSURE ASSOCIATED WITH THE ITCZ 
W OF 130W. AS A RESULT...THE PRESSURE GRADIENT IS SLIGHTLY 
TIGHTER IN THIS AREA...AND MODERATE TO FRESH WINDS ARE 
PREVAILING. WITH WINDS 20 KT OR LESS AND NO SIGNIFICANT SWELLS 
OVER THE AREA...SEAS REMAIN BELOW 8 FT. 
 
THE SURFACE RIDGE WILL STRENGTHEN SLIGHTLY OVER THE NEXT COUPLE 
OF DAYS. THIS WILL EXPAND THE AREA OF FRESH TRADEWINDS N OF THE 
ITCZ OVER THE WESTERN PART OF THE AREA. A COLD FRONT WILL 
APPROACH THE NW WATERS BY THU...WITH SOUTHERLY FLOW AHEAD OF THE 
FRONT INCREASING TO A FRESH BREEZE OVER THIS AREA. 
  
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AL