000
AXPZ20 KNHC 051529
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH 6N83W 2N95W 5N110W. ITCZ 5N110W 3N140W. SCATTERED 
MODERATE TO STRONG CONVECTION WITHIN 180 NM S OF AXIS FROM 
83W-92W.

DISCUSSION...
BROAD UPPER LEVEL TROUGH IS ACROSS THE DISCUSSION AREA W OF 
130W. STRONG UPPER TROUGH N OF THE AREA HAS FLATTENED THE UPPER 
LEVEL RIDGE E OF THE TROUGH TO 115W. EXCEPT FOR AN AREA OF HIGH 
LEVEL MOISTURE FROM 15N-22N BETWEEN 127W-135W MODERATE TO STRONG 
SUBSIDENCE WITH DRY/STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS 
W OF 110W. A SHARP UPPER LEVEL TROUGH FROM SOUTHERN BAJA 
CALIFORNIA TO 5N105W. ABUNDANT MOISTURE IS E OF THE TROUGH AXIS. 
AN UPPER LEVEL RIDGE EXTENDS ACROSS MEXICO TO TO CENTRAL AMERICA.

DISSIPATING COLD FRONT EXTENDS FROM NORTHERN BAJA CALIFORNIA TO 
26N120W. NLY WINDS 20 WITH SEAS TO 13 IN NW SWELL ARE W OF THE 
FRONT. THE FRONT WILL WEAKEN AND MOVE INLAND AND DISSIPATE LATER 
TODAY. HIGH PRES RIDGE IS PRODUCING A SMALL ARE OF 20 KT TRADES 
FROM 8N-12N W OF 130W. OTHERWISE LARGE NW SWELLS ACROSS THE AREA 
W OF AROUND 110W...WITH SEAS UP TO 9 FT.

$$
DGS