000
AXPZ20 KNHC 081540
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SUN APR 08 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 05N77W TO 06N93W...THEN ITCZ TO 01N130W.  NUMEROUS STRONG 
CONVECTION WITHIN 150 NM OF AXIS FROM 115W TO 122W.  SCATTERED 
MODERATE CONVECTION ELSEWHERE WITHIN 90 NM OF AXIS FROM 1105W TO 
127W.

DISCUSSION...
WEAKENING 1020 MB HIGH PRES CENTER AT 26N126W BEING FORCED S BY 
INCOMING COLD FRONT.  RIDGE EXTEND TO 15N110W SQUEEZES PRES 
GRADIENT WITH LOW LEVEL TROUGH EMBEDDED IN ITCZ ALONG 119W 
INCREASING NE WIND FLOW TO A FRESH BREEZE W OF TROUGH.
 
COLD FRONT FROM 32N129W TO 24N140W MOVE SE REACHING FROM 32N125W 
TO 18N135W LATE MON...THEN 32N123W TO 20N133W EARLY TUE.  LARGE 
NW SWELL...UP TO 14 FT...FOLLOWING FRONT SUBSIDE TO 10 FT EARLY 
TUE. 

CROSS EQUATORIAL SW SWELL TO 9 FT PREVAILS S OF 08N W OF 100W 
DECREASING IN HEIGHT AND COVERAGE THROUGH LATE MON.  SEAS TO 8 
FT COVER AREA S OF 10N FROM 114W TO 135W.

WEAK TROUGH OVER YUCATAN PENINSULA FUNNELS STRONG NE WIND FLOW 
ACROSS CHIVELA PASS RESULTINGIN STRONG N WINDS OVER GULF OF 
TEHAUNTEPEC STARTING LATE TONIGHT THROUGH TUE. 

$$
WALLY BARNES