000
AXPZ20 KNHC 122139
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC THU APR 12 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2115 UTC.

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

ITCZ EXTENDS FROM 03N110W TO 05N115W TO 01N135W. NO SIGNIFICANT 
CONVECTION.

...DISCUSSION...

A BROAD MIDDLE/UPPER LEVEL TROUGH COVERS THE DISCUSSION AREA N 
OF ABOUT 20N E OF 140W WITH THE STRONGEST WESTERLY WINDS...TO 80 
KNOTS...LOCATED N OF 28N E OF 130W INTO BAJA CALIFORNIA. AT THE 
SURFACE A COLD FRONT IS LOCATED THROUGH 32N125W TO 30N132W WITH 
A PRE-FRONTAL TROUGH LOCATED FROM 32N124W TO 27N130W. IN THE 
AREA N OF 20N W OF 120W WINDS ARE LESS THAN 20 KT WITH SEAS TO 9 
FT IN NW SWELL. ALSO A 1025 MB HIGH IS ANCHORED IN THE VICINITY 
OF 25N127W. THIS FEATURE IS FORECAST TO DISSIPATE IN 24 HOURS. 
WATER VAPOR IMAGERY REVEALS STRONG SUBSIDENCE FROM 18N TO 25N 
FROM THE COAST OF MEXICO TO WELL BEYOND 140W. 

MODERATE WESTERLY WINDS ALOFT ARE LOCATED FROM ABOUT 12N TO 20N 
BETWEEN 110W AND 140W. IN THE AREA FROM 05N TO 20N W OF 115W 
WINDS ARE NE WINDS 20 KT WITH SEAS 8 TO 11 FT IN MIXED NW AND NE 
SWELL. ELSEWHERE S OF 20N W OF 110W WINDS ARE LESS THAN 20 KT WITH 
SEAS TO 9 FT IN MIXED SW AND NW SWELL. WINDS ALOFT ARE GENERALLY 
LIGHT E OF 100W INTO CENTRAL AND SOUTH AMERICA. AT THE SURFACE A 
TROUGH IS LOCATED FROM 03N89W TO 03N100W. SCATTERED MODERATE 
ISOLATED STRONG CONVECTION IS LOCATED WITHIN 120 NM N AND 90 NM 
S OF THE TROUGH.

$$
CAB