000
AXPZ20 KNHC 110918
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC WED APR 11 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...
THE ITCZ IS S OF THE EQUATOR.

DISCUSSION...
AN UPPER LEVEL TROUGH FROM 32N121W TO 20N134W. A 90 KT NW 
JETSTREAM W OF THE TROUGH FROM 32N127W TO 28N122W THEN BECOMING 
SW 100-105 KT FROM 28N122W TO NORTHERN BAJA CALIFORNIA. UPPER 
LEVEL RIDGING IS NW OF THE TROUGH. FURTHER E...AN UPPER LEVEL 
RIDGE IS N OF 20N E OF THE TROUGH WITH AXIS OVER MEXICO. ANOTHER 
UPPER LEVEL TROUGH EXTENDS FROM 15N100W TO 5N100W. ABUNDANT 
TROPICAL MOISTURE IS S OF 7N E OF 115W. IN THE DEEP TROPICS AN 
UPPER LEVEL ANTICYCLONIC CIRCULATION IS CENTERED NEAR 8N117W. 

SURFACE TROUGH EXTENDS FROM 32N124W TO 21N129W. LARGE NW SWELLS 
UP TO 11 FT ARE W OF THE TROUGH. THE THE WILL MOVE OUT OF THE 
AREA AND DISSIPATE LATER TODAY. IN THE TROPICS A SURFACE TROUGH 
EXTENDS FROM 10N85W TO 2N103W. SCATTERED MODERATE TO STRONG 
CONVECTION FROM 00N-5N BETWEEN 90W-100W. ANOTHER TROUGH EXTENDS 
FROM 4N107W TO 1N115W. SCATTERED MODERATE TO STRONG FROM 2N-7N 
BETWEEN 108W-120W.

NLY WINDS 20-25 KT THROUGH THE GULF OF TEHUANTEPEC WILL DECREASE 
TO BELOW 20 KT BY THIS AFTERNOON.

HIGH PRES BUILDING W OF THE TROUGH HAS TIGHTENED THE PRES 
GRADIENT ENOUGH FOR TRADES TO 20 KT FROM 4N-15N W OF 122W WILL 
INCREASE IN COVERAGE WITHIN THE NEXT 24-48 HOURS.

$$
DGS