000
AXPZ20 KNHC 110916
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC THU AUG 11 2011

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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0845 UTC.

...ITCZ/MONSOON TROUGH...

MONSOON TROUGH EXTENDS FROM COSTA RICA NEAR 10N83W TO 08N94W TO 
14N106W TO 14N117W TO 13N128W. ITCZ AXIS EXTENDS FROM 13N128W TO 
BEYOND 09N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION IS 
FROM 05N TO 10N E OF 99W TO COLOMBIA. SCATTERED MODERATE 
CONVECTION IS FROM 12N TO 16N BETWEEN 113W AND 120W...AND FROM 
07N TO 10N BETWEEN 136W AND 140W. 

...DISCUSSION...

AN UPPER LEVEL HIGH IS OVER MEXICO AT 30N107W WITH AN UPPER 
RIDGE EXTENDING W TO 30N128W. A SMALL UPPER LEVEL LOW IS 
CENTERED OVER 21N125W. FURTHER W ...AN UPPER LEVEL TROUGH IS 
PRODUCING SW FLOW N OF 20N W OF 130W WITH STRONG SUBSIDENCE.  

AN UPPER LEVEL LOW IS CENTERED OVER THE TROPICS NEAR 03N104W AND 
WILL MOVE W TO 03N110W BY FRI NIGHT. UPPER DEBRIS MOISTURE IS 
NOTED OVER THE DEEP TROPICAL PACIFIC FROM 03N TO 10N BETWEEN 79W 
AND 120W...AND FROM 05N TO 15N BETWEEN 120W AND 140W.  

AT THE SURFACE...A RIDGE EXTENDS FROM 32N140W TO 25N120W. 
AN AREA OF MIXED SE AND SW SWELL...COMBINED SEAS TO 8 FT...IS 
LOCATED S OF 14N BETWEEN 115W AND 125W AND ELSEWHERE S OF 05N W 
OF 100W. THESE CROSS EQUATORIAL SWELLS SHOULD CONTINUE TO 
PROPAGATE NE TO ALONG 16N TO THE E OF 108W BY FRI NIGHT. 
SOUTHEASTERLY WINDS WILL INCREASE BRIEFLY TO 20 KT THU IN SE 
SWELL OVER THE DEEP TROPICS TO THE S OF 05N BETWEEN 112W AND 
140W. 

$$
FORMOSA