000
AXPZ20 KNHC 182122
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC WED APR 18 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 
2100 UTC.

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

ITCZ AXIS IS FROM 05N98W TO 09N114W TO 04N130W TO 04N140W. 
SCATTERED MODERATE CONVECTION IS FROM 04N TO 07N BETWEEN 107W 
AND 112W...AND FROM 02N TO 06N BETWEEN 116W AND 132W.

...DISCUSSION...

HIGH PRES RIDGE ANCHORED BY NEARLY STATIONARY 1027 MB HIGH NEAR 
30N140W WILL PERSIST THROUGH FRI. FRESH NORTHERLY WINDS ALONG 
THE COAST OF SRN CALIFORNIA ARE EXPECTED TO CONTINUE THROUGH FRI 
WITH NW SWELL TO 9 FT EXTENDING SOUTHWARD TO AROUND 27N BETWEEN 
118W AND 124W. AN AREA OF MODERATE TO FRESH E-NE TRADE WINDS IS 
LOCATED S OF THE RIDGE FROM 05N TO 21N W OF 130W. THESE WINDS 
WILL GRADUALLY CONTRACT THROUGH THE NEXT 48 HOURS...COVERING ONLY
A SMALL AREA FROM 06N TO 10N W OF 135W BY FRI EVENING.

NORTHERLY 20-30 KT WINDS ARE FUNNELING SOUTHWARD FROM THE CHIVELA
PASS INTO THE GULF OF TEHUANTEPEC. WINDS WILL GRADUALLY DIMINISH 
TO BELOW 20 KT BY THU EVENING. 

$$
FORMOSA