000
AXPZ20 KNHC 132154
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC WED OCT 13 2010

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN
FROM THE EQUATOR TO 32N...EAST OF 140W.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2130 UTC.

...TROPICAL WAVE....
A TROPICAL WAVE IS N OF 06N ALONG 83W MOVING W AT 10-15 KT. 
WIDELY SCATTERED MODERATE CONVECTION IS S OF PANAMA FROM 05N TO 
10N BETWEEN 79W AND 83W. 

...THE ITCZ...

THE ITCZ AXIS IS CENTERED ALONG 08N83W 07N110W TO A 1011 MB AT 
13N129W TO 11N140W. BESIDES THE CONVECTION MENTIONED IN THE 
TROPICAL WAVE SECTION... WIDELY SCATTERED MODERATE IS FROM 06N 
TO 10N BETWEEN 86W AND 94W. ISOLATED MODERATE CONVECTION IS FROM 
06N TO 09N BETWEEN 112W AND 116W. SCATTERED MODERATE TO ISOLATED 
STRONG CONVECTION IS FROM 08N TO 12N BETWEEN 123W AND 129W. 
WIDELY SCATTERED MODERATE CONVECTION IS FURTHER NW FROM 12N TO 
16N BETWEEN 129W AND 137W.  

...DISCUSSION...

IN THE UPPER LEVELS...
A LARGE ANTICYCLONE CENTERED NEAR 13N125W IS ENHANCING 
CONVECTION OVER A SURFACE LOW. ANTICYCLONIC FLOW WITH 
CONSIDERABLE UPPER LEVEL MOISTURE IS FROM 07N TO 25N BETWEEN 
110W AND 140W. FURTHER E...A LARGE UPPER LEVEL TROUGH WITH 
STRONG SUBSIDENCE IS N OF THE EQUATOR TO 20N BETWEEN 90W AND 
110W. ELSEWHERE...TWO SMALL SHORTWAVE CYCLONES ARE W OF BAJA 
CALIFORNIA WITH MORE SUBSIDENCE AT 29N135W AND AT 27N116W MOVING 
E.   

ON THE SURFACE... 
A 1021 MB HIGH IS CENTERED AT 31N141W. A RIDGE AXIS EXTENDS SE 
TO 24N115W. THE SURFACE PRESSURE GRADIENT SW OF THIS RIDGE...AND 
N OF THE LOW AT 13N129W...IS SUPPORTING NE TRADES TO 20 KT WITH 
SEAS TO 9 FT. 

GAP WINDS...
A GALE IS OVER THE GULF OF TEHUANTEPEC. GALE FORCE WINDS ARE 
EXPECTED TO SLIGHTLY INCREASE TO 40 KT THURSDAY THEN PERSIST 
BEYOND FRIDAY. 

$$
FORMOSA