000
AXPZ20 KNHC 060922
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC FRI APR 06 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 FROM 08N83W TO 02N108W. ITCZ FROM 02N108W TO 
04N117W TO 03.5N140W. NO SIGNIFICANT CONVECTION WAS NOTED.

DISCUSSION...

HIGH PRES 1028 MB HIGH IS CENTERED NORTH OF THE AREA NEAR 
35N132W WITH RIDGE EXTENDING SE TO NEAR 14N104W. THE PRESSURE 
GRADIENT BETWEEN THE AREA OF HIGH PRESSURE AND A TROUGH OVER 
MEXICO IS MAINTAINING FRESH TO STRONG NORTHERLY WINDS N OF 24N 
BETWEEN 116W AND 127W. THE PRESSURE GRADIENT BETWEEN THE AREA OF 
HIGH PRESSURE AND LOWER PRESSURE IN THE VICINITY OF THE ITCZ IS 
MAINTAINING FRESH TRADEWINDS FROM THE ITCZ TO 26N W OF 127W. 
THIS AREA OF HIGH PRESSURE WILL SHIFT SOUTHWARD AND CONTINUE TO 
WEAKEN OVER THE NEXT 48 HOURS. THIS WILL ENABLE A COLD FRONT TO 
MOVE INTO THE FAR NW PART OF THE AREA SAT NIGHT. THE WEAKENING 
HIGH PRESSURE WILL HELP DIMINISH WINDS BELOW 20 KT OVER MUCH OF 
THE FORECAST AREA...WITH THE EXCEPTION OF A SMALL AREA OF 20 KT 
WINDS JUST E OF THE COLD FRONT. 

NW SWELL IS AFFECTING MUCH OF THE AREA W OF 110W WITH COMBINED 
SEAS TO 14 FT N OF 27N BETWEEN 117W AND 122W. THE SWELLS WILL 
SLOWLY SUBSIDE OVER THE NEXT 48 HOURS. THE COLD FRONT MENTIONED 
ABOVE WILL USHER IN A NEW SET OF NW SWELLS WITH COMBINED SEAS TO 
12 FT OVER THE FAR NW PART OF THE AREA BY LATE SAT NIGHT.

$$
AL