000
AXPZ20 KNHC 100920
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
ITCZ AXIS 3N111W 5N120W 3N133W. NO SIGNIFICANT CONVECTION.

DISCUSSION...
UPPER LEVEL TROUGH OVER FAR NW PORTION OF AREA WITH AXIS FROM 
32N133W TO 20N140W. A NLY 90-105 KT JETSTREAM IS W OF THE TROUGH 
AXIS FROM 32N139W TO 26N133W THEN BECOMES SLY 100-110 KT TO 
32N124W.  UPPER LEVEL MOISTURE E OF THE TROUGH IS BEING ADVECTED 
NWD. AN UPPER LEVEL RIDGE IS N OF 20N E OF THE TROUGH. AN UPPER 
LEVEL TROUGH EXTENDS FROM 15N103W TO THE EQUATOR AT 95W. AN 
UPPER LEVEL RIDGE EXTENDS FROM AN ANTICYCLONIC CIRCULATION OVER 
COLOMBIA NW ACROSS CENTRAL AMERICA. ABUNDANT TROPICAL MOISTURE 
IS BETWEEN THE TROUGH AND RIDGE AXIS. MODERATE TO STRONG 
SUBSIDENCE WITH DRY STABLE AIR AT MID AND UPPER LEVELS ELSEWHERE 
N OF 10N E OF 115W.

COLD FRONT EXTENDS FROM 32N123W TO 20N133W. SCATTERED SHOWERS 
ARE ALONG THE FRONT. NW WINDS TO 20 KT ARE N OF 28N W OF 135W.
LARGE NW SWELLS UP TO 12 FT ARE W OF THE FRONT. THE FRONT WILL 
MOVE TO 32N119W TO 20N125W TONIGHT THEN DISSIPATE LATE WED.  

SURFACE TROUGH FROM 1N103W TO 1N109W. SCATTERED MODERATE TO 
STRONG WITHIN 90 NM N OF TROUGH.

HIGH PRES ACROSS THE GULF OF MEXICO HAS TIGHTENED THE PRES 
GRADIENT OVER SOUTHERN MEXICO WITH STRONG NLY WINDS THROUGH THE 
GULF OF TEHUANTEPEC...WITH WINDS TO 30 KT AND SEAS TO 11 FT. 
WINDS WILL DECREASE TONIGHT AS THE GRADIENT RELAXES.

CROSS EQUATORIAL SW SWELL TO 8 FT S OF 10N W OF 114W WILL 
GRADUALLY DECREASE IN HEIGHT AND COVERAGE THROUGH TONIGHT.

$$
DGS