000
AXPZ20 KNHC 120951
TWDEP 

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

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
ITCZ FROM 4N103W TO 4N114W. SCATTERED MODERATE ISOLATED 
STRONG S OF 04N BETWEEN 95W-100W.

DISCUSSION...
A BROAD UPPER LEVEL TROUGH IS OVER THE FAR NW PORTION OF THE 
DISCUSSION AREA N OF 20N W OF 110W WITH MOSTLY ZONAL FLOW. A 
90-100 KT JETSTREAM FROM 32N133W TO 31N120W TO NORTHERN BAJA 
CALIFORNIA. ANOTHER 90-100 KT JETSTREAM AROUND THE BASE OF THE 
TROUGH FROM 20N125W TO 21N110W. AN UPPER LEVEL RIDGE IS E OF THE 
TROUGH OVER MEXICO.

IN THE DEEP TROPICS AND UPPER LEVEL ANTICYCLONIC CIRCULATION IS 
CENTERED NEAR 8N114W.  AN UPPER LEVEL TROUGH E OF THE 
ANTICYCLONE EXTENDS FROM 15N95W TO 5N102W. ABUNDANT TROPICAL 
MOISTURE IS E OF THE TROUGH AXIS WITH SCATTERED CONVECTION.

A 1023 MB HIGH PRES NEAR 25N124W WITH RIDGE ALONG 25N HAS 
TIGHTENED THE PRESSURE GRADIENT ENOUGH FOR TRADES TO 20 KT FROM 
4N-17N W OF 120W. THEY WILL INCREASE IN COVERAGE WITHIN THE NEXT 
24-48 HOURS.

THE COMBINATION OF THE PACIFIC RIDGE AND LOWER PRES OVER MEXICO 
HAS INCREASED NW WINDS TO 20 KT ALONG THE COAST OF BAJA 
CALIFORNIA.

$$
DGS