000
AXPZ20 KNHC 242112
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC FRI AUG 24 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 ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH EXTENDS FROM 10N85W TO 1010 MB LOW PRES AT 
11.5N97W TO 09N115W TO 12N130W TO 12N140W. SCATTERED MODERATE 
FROM 05N TO 08N E OF 86W. SCATTERED MODERATE ISOLATED STRONG 
WITHIN 120 NM S OF TROUGH AXIS BETWEEN 88W AND 91W...FROM 10N TO 
13N BETWEEN 95W AND 100W...FROM 08N TO 12N BETWEEN 100W AND 
107W...FROM 06N TO 11N BETWEEN 110W AND 122W AND WITHIN 60 NM 
EITHER SIDE OF TROUGH W OF 122W.

...DISCUSSION...
HIGH PRESSURE 1026 MB PREVAILS NW OF THE AREA NEAR 37N144W WITH 
WEAK RIDGE EXTENDING SE TO NEAR 24N115W. THE PRESSURE GRADIENT 
OVER THE AREA IS WEAK...AND WINDS N OF THE MONSOON TROUGH W OF 
110W ARE MAINLY LIGHT TO MODERATE AS DEPICTED BY THE LATEST 
SCATTEROMETER PASSES. 

THE MONSOON TROUGH STRETCHES ACROSS THE EAST PAC ALONG 11-12N 
WITH SCATTERED SHOWERS AND FEW TSTMS LOCATED ALONG AND WITHIN 90 
NM S OF THE TROUGH AXIS. AS IS TYPICAL IN THIS FAVORABLE 
BACKGROUND ENVIRONMENT...WEAK LOWS ARE EMBEDDED WITHIN THE 
MONSOON TROUGH. MODEL GUIDANCE SHOWS LITTLE CHANGE IN THE DEEP 
TROPICS THE NEXT COUPLE OF DAYS. THE MONSOON TROUGH WILL REMAIN 
CONVECTIVELY ACTIVE WITH MULTIPLE AREAS OF WEAK LOW PRES 
EMBEDDED WITHIN THE TROUGH...BUT WINDS WILL REMAIN LIGHT TO 
MODERATE ALL ALONG THE TROUGH AXIS.  

CROSS-EQUATORIAL SOUTHERLY SWELL WITH COMBINED SEAS TO 8 FT 
PREVAILS ACROSS THE FAR SW PART OF THE AREA. ANOTHER SURGE OF 
SOUTHERLY SWELL WILL MOVE INTO THE AREA BY SAT...WITH SEAS TO 9 
FT COVERING THE AREA S OF 08N BETWEEN 92W AND 118W BY SUN 
AFTERNOON. 

$$
AL