000
AXPZ20 KNHC 280915
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

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

MONSOON TROUGH EXTENDS FROM 09N84W TO 05N88W. ITCZ AXIS EXTENDS 
FROM 04N90W TO 02N103W TO 06N115W TO 03N124W TO 02N140W. 
SCATTERED MODERATE TO STRONG CONVECTION FROM 02N TO 05N E OF 
81W. SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 150 NM 
N OF AXIS BETWEEN 114W AND 125W. 

...DISCUSSION...
STRONG 1032 MB HIGH PRES IS CENTERED NEAR 33N137W WITH RIDGE 
EXTENDING SE TO NEAR 16N112W. THE PRESSURE GRADIENT BETWEEN THIS 
FEATURE AND TROUGHING OVER MEXICO IS MAINTAINING FRESH NW WINDS 
WITHIN 240 NM OF THE W COAST OF BAJA CALIFORNIA. THE PRESSURE 
GRADIENT BETWEEN THE AREA OF HIGH PRES AND LOWER PRESSURE IN THE 
VICINITY OF THE ITCZ IS MAINTAINING FRESH TRADE WINDS FROM 04N TO
23N W OF 120W. THE AREA OF HIGH PRESSURE WILL SLOWLY SHIFT W-NW 
OVER THE NEXT TWO DAYS...WHICH WILL ALLOW THE REGION OF HIGHEST 
TRADES AND WIND-DRIVEN SEAS TO GRADUALLY SHIFT W OF 130W BY MON. 

GALE FORCE WINDS N OF THE AREA ALONG THE CALIFORNIA COAST WILL 
SPREAD NW SWELL S OF 30N TONIGHT...WITH COMBINED SEAS REACHING 
12-13 FT BY EARLY SUN. THIS SWELL WILL SPREAD SOUTHWARD TO 
AROUND 25N THROUGH SUN NIGHT WITH COMBINED SEAS OF 8-11 FT N OF 
BETWEEN 119W AND 133W. 

$$
MUNDELL