000
AXPZ20 KNHC 242143
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SAT OCT 24 2009

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 
2115 UTC.

...ITCZ...

THE INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM 08N77W TO 
09N97W TO 12N111W TO 09N126W TO 10N140W. SCATTERED MODERATE 
ISOLATED STRONG CONVECTION IS LOCATED FROM 06N TO 10N BETWEEN 
84W AND 89W...WITHIN 90 NM EITHER SIDE OF A 07N97W TO 09N108W 
LINE...WITHIN 90 NM EITHER SIDE OF A 14N107W TO 10N118W 
LINE...AND WITHIN 90 NM EITHER SIDE OF A 09N123W TO 09N130W LINE.

...DISCUSSION...

W OF 105W...
A LARGE MIDDLE/UPPER LEVEL TROUGH COVERS THE AREA N OF ABOUT 15N 
E OF 130W INCLUDING MEXICO. WATER VAPOR IMAGERY INDICATES STRONG 
SUBSIDENCE IN THIS AREA. THE TROUGH IS FORECAST TO MOVE LITTLE 
OVER THE NEXT 48 HOURS. A RIDGE ALOFT IS LOCATED FROM NEAR 15N 
TO 25N W OF 130W AND IS AMPLIFYING NORTHWARD. THE AXIS IS 
LOCATED ALONG 135W. LIGHT EASTERLY FLOW ALOFT IS LOCATED OVER 
THE TROPICS S OF 10N. AT THE SURFACE A 1027 MB HIGH IS 
POSITIONED NEAR 35N137W AND IS NEARLY STATIONARY. A SURFACE 
TROUGH IS LOCATED FROM 14N110W TO 10N114W. 

E OF 105W...
LIGHT TO MODERATE NORTHWESTERLY WINDS ALOFT ARE LOCATED N OF 
ABOUT 05N E OF 105W. WINDS WILL BECOME MORE NORTHERLY IN 24 
HOURS AND THEN EASTERLY TO SOUTHEASTERLY IN 48 HOURS. AT THE 
SURFACE A 1008 MB LOW IS CENTERED OFF THE COAST OF COSTA RICA 
NEAR 08N86W. 

$$
CAB