000
AXPZ20 KNHC 050309
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC THU APR 05 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 AXIS FROM 08N82W TO 03N90W TO 06N105W. ITCZ AXIS 
FROM 09N110W TO 04N130W TO 03N140W. SCATTERED MODERATE TO 
ISOLATED STRONG CONVECTION IS FROM 02N TO 10N BETWEEN 80W AND 
85W. SCATTERED MODERATE CONVECTION IS FROM 01N TO 05N BETWEEN 
87W AND 93W...AND FROM 08N TO 11N BETWEEN 109W AND 112W. 

DISCUSSION...
BROAD UPPER LEVEL RIDGE IS ACROSS THE DISCUSSION AREA W OF 125W. 
MODERATE TO STRONG SUBSIDENCE WITH DRY/STABLE AIR AT THE MIDDLE 
AND UPPER LEVELS IS S OF 27N W OF 120W. UPPER LEVEL CYCLONIC 
CIRCULATION IS CENTERED NEAR 17N116W WITH TROUGH FROM THE 
CIRCULATION TO 5N115W. UPPER LEVEL RIDGE EXTENDS FROM THE 
NORTHERN GULF OF CALIFORNIA TO 12N102W. UPPER LEVEL DIFFLUENT 
FLOW IS ENHANCING CONVECTION S OF 10N E OF 110W.

COLD FRONT EXTENDS FROM 30N117W TO 27N123W TO 27N140W. 20-25 KT 
NE WINDS WITH SEAS TO 12 IN NW SWELL ARE W OF THE FRONT. THE 
FRONT WILL WEAKEN AND MOVE INLAND THU. HIGH PRES RIDGE IS 
PRODUCING A SMALL ARE OF 20 KT TRADES FROM 13N-16N W OF 132W. 
OTHERWISE LARGE NW SWELLS FROM A PREVIOUS SWELL TRAIN ARE ACROSS 
THE AREA W OF AROUND 100W...WITH SEAS UP TO 9 FT.

$$
FORMOSA