000
AXPZ20 KNHC 201536
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC FRI AUG 20 2010

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

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC. 

...SPECIAL FEATURE...
TROPICAL DEPRESSION EIGHT-E IS CENTERED NEAR 19.1N107.9W. THE 
ESTIMATED SEA LEVEL PRESSURE IS 1004 MB. THE SYSTEM IS MOVING 
NORTHWEST AT 6 KT. THERE IS NUMEROUS TO SCATTERED SHOWERS AND 
THUNDERSTORMS WITHIN 220 NM SW SEMICIRCLE. 

...ITCZ...

THE INTERTROPICAL CONVERGENCE ZONE AXIS IS ANALYZED ALONG 
11N110W TO 10N118W TO 11N130W TO 08N140W. SCATTERED MODERATE 
CONVECTION IS WITHIN 120 NM S OF THE ITCZ BETWEEN 124W AND 131W.

...DISCUSSION...

AN UPPER LEVEL ANTICYCLONE IS CENTERED NEAR 24N128W WITH RIDGE 
EXTENDING SW TO 18N140W AND NE TO 30N108W WHERE ANOTHER UPPER 
LEVEL ANTICYCLONE IS CENTERED. DRY AIR ALOFT IS INDICATED BY 
WATER VAPOR IMAGERY N OF 20N W OF 120W. NE TO E FLOW ALOFT IS 
NOTED OVER THE DEEP TROPICS WITH SIGNIFICANT MID/UPPER LEVEL 
MOISTURE E OF 120W.  

AT THE SURFACE...A SURFACE RIDGE COVERS THE AREA N OF 20N W OF 
125W. A SURFACE 1010 MB LOW IS EMBEDDED WITHIN THE ITCZ NEAR 
11N132W. 

CROSS EQUATORIAL S SWELL CONTINUES TO SPREAD N WITH SEAS TO 12 
FT OVER S CENTRAL WATERS AND SE WATERS TO THE COAST OF MEXICO 
AND W PANAMA. THIS LONG PERIOD SWELL IS EXPECTED TO BRING SEAS 
OF 8 TO 10 FT TO THE REMAINDER OF THE COAST S OF 20N BY EARLY 
SAT MORNING. AT THE SAME TIME...A NEW BATCH OF LONG PERIOD 
SWELLS FROM THE S WILL AFFECT THE SW WATERS.

$$
AL