000
AXPZ20 KNHC 172047
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC TUE AUG 17 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 
2100 UTC.

...TROPICAL WAVE...

A TROPICAL WAVE IS N OF 10N ALONG 89W AND HAS BEEN MOVING W AT 8 
KT. ONLY LIMITED CONVECTION IS ASSOCIATED WITH THIS WAVE. 

...ITCZ...

THE INTERTROPICAL CONVERGENCE ZONE AXIS WAS ANALYZED FROM 10N85W 
TO 09N88W THEN 09N92W TO 07N101W TO 10N119W TO 08N130W TO 
07N140W. SCATTERED MODERATE  WITHIN 60 NM S OF AXIS BETWEEN 92W 
AND 97W AND ALSO WITHIN 90 NM S OF AXIS BETWEEN 112W AND 117W.

...DISCUSSION...

AN UPPER LEVEL ANTICYCLONE IS CENTERED NEAR 22N133W WITH RIDGE 
EXTENDING SW TO BEYOND 20N140W AND NORTHEAST TO BEYOND 30N117W. 
THE REGION NW OF THE RIDGE IS MARKED BY RELATIVELY DRY 
CONDITIONS. AN UPPER LEVEL INVERTED TROUGH LIES FROM 07N127W TO 
22N119W. OTHERWISE...EASTERLY FLOW PREVAILS IN THE DEEP TROPICS 
S OF 10N. 

AT THE SURFACE...A WEAK SURFACE RIDGE EXTENDS FROM A DISSIPATING 
1025 MB HIGH PRESSURE CENTERED NEAR 36N144W TO 25N120W. A 
FILLING 1008 MB LOW PRES SYSTEM LIES NEAR 22N112W. 

CROSS EQUATORIAL SWELL UP TO 8 FT OVER S CENTRAL WATERS WILL 
SLOWLY MOVE NORTH OF 10N BY LATE WED NIGHT. THIS SWELL WILL 
GRADUALLY MAKE ITS WAY E OF THE GALAPAGOS ISLANDS...AND SEAS 
WILL REACH 8 FT OFF THE COAST OF PANAMA NEAR 06N BY THE END OF 
THE FORECAST PERIOD EARLY THU MORNING.

$$
AL