000
AXPZ20 KNHC 101527
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC TUE APR 10 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...ITCZ AXIS 

MONSOON TROUGH FROM 03N90W TO 01N104W TO 05N111W. ITCZ AXIS FROM 
05N111W TO 03N130W TO 03N140W. SCATTERED MODERATE FROM 00N TO 
03N BETWEEN 98W AND 110W. 

DISCUSSION...
AN UPPER LEVEL TROUGH IS OVER THE FAR NW PORTION OF AREA N OF 
20N W OF 120W WITH AXIS ALONG 130W. THIS FEATURE IS SUPPORTING A 
SURFACE COLD FRONT. A 90 KT JETSTREAM IS NOTED AROUND THE BASE 
OF THE TROUGH. UPPER LEVEL MOISTURE IS S AND E OF THE TROUGH 
ADVECTING NEWD. FURTHER E...AN UPPER LEVEL RIDGE IS N OF 10N 
BETWEEN 105W AND 120W E. ANOTHER UPPER LEVEL TROUGH EXTENDS N OF 
THE EQUATOR BETWEEN 85W AND 105W. ABUNDANT UPPER LEVEL TROPICAL 
MOISTURE AND BROKEN HIGH CLOUDS ARE E OF 100W.  

A COLD FRONT EXTENDS FROM 32N124W TO 21N129W. SCATTERED SHOWERS 
ARE WITHIN 90 NM W OF THE FRONT. NW WINDS TO 20 KT ARE N OF 
26N W OF 135W. LARGE NW SWELLS UP TO 12 FT ARE W OF THE FRONT. 
THE FRONT WILL MOVE OUT OF THE AREA AND DISSIPATE IN 24 HOURS.  
IN THE TROPICS A SURFACE TROUGH EXTENDS FROM 07N88W TO 02N88W. 
SCATTERED MODERATE TO STRONG CONVECTION IS FROM 02N TO 04N 
BETWEEN 84W AND 88W.

THE GULF OF TEHUANTEPEC AND SURROUNDING DOWNSTREAM WATERS HAVE 
WINDS TO 30 KT AND SEAS TO 11 FT. WINDS WILL DECREASE TO 20 KT 
IN 12 HOURS BUT SEAS WILL REMAIN TO 10 FT WITH SWELL. WINDS WILL 
BE LESS THAN 20 KT AND SEAS LESS THAN 8 FT IN 24 HOURS.  

CROSS EQUATORIAL SW SWELL ARE PRESENTLY S OF 20N E OF 120W. 
ELSEWHERE...A DOMINATE NW SWELL TRAIN IS PRESENTLY N OF 20N W OF 
120W MOVING SE. IN 48 HOURS THE NW SWELL TRAIN WILL REACH THE 
EQUATOR AND 120W.  

$$
FORMOSA