000
AXPZ20 KNHC 280310
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SAT APR 28 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0300 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10N85W TO 04N96W. ITCZ FROM 04N110W TO 
06N118W TO 02N140W. SCATTERED MODERATE TO STRONG CONVECTION WAS 
NOTED WITHIN 120 NM S OF AXIS BETWEEN 85W AND 89W. SCATTERED 
MODERATE ISOLATED STRONG CONVECTION WAS NOTED WITHIN 90 NM OF 
AXIS BETWEEN 115W AND 129W. 

...DISCUSSION...
HIGH PRESSURE 1032 MB IS CENTERED NEAR 33N136W WITH RIDGE 
EXTENDING SE TO NEAR 18N112W. THE PRESSURE GRADIENT BETWEEN THIS 
FEATURE AND TROUGHING OVER MEXICO IS MAINTAINING FRESH NW WINDS 
WITHIN 240 NM OF W COAST OF BAJA CALIFORNIA. THE PRESSURE 
GRADIENT BETWEEN THE AREA OF HIGH PRESSURE AND LOWER PRESSURE IN 
THE VICINITY OF THE ITCZ IS MAINTAINING FRESH TRADEWINDS FROM 
04N TO 20N W OF 120W. THE AREA OF HIGH PRESSURE WILL MAINTAIN 
THROUGH THE NEXT TWO DAYS MAINTAINING THE AREA OF FRESH WINDS. 

DEVELOPING GALE N OF THE AREA WILL USHER IN A SET OF NW SWELL 
WITH COMBINED SEAS REACHING NEAR 13 FT BY SAT NIGHT. THIS SWELL 
WILL SPREAD SOUTHWARD THROUGH SUN NIGHT WITH COMBINED SEAS IN 
THE 10 TO 12 FT RANGE COVERING THE AREA N OF 22N BETWEEN 117W 
AND 127W. 

$$
AL