000
AXPZ20 KNHC 250332
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SUN OCT 25 2009

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

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0315 UTC.

...ITCZ...

THE INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM 09N82W TO 
09N90W TO 10N100W TO 12N110W TO 09N128W TO 10N140W. SCATTERED 
MODERATE ISOLATED STRONG CONVECTION IS LOCATED FROM 10N TO 12N 
BETWEEN 91W AND 94W...WITHIN 90 NM EITHER SIDE OF A 09N100W TO 
09N106W LINE...AND WITHIN 90 NM EITHER SIDE OF A 12N110W TO 
08N128W TO 09N132W 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. MODERATE NORTHWESTERLY WINDS EXTEND 
THROUGH 32N125W INTO THE NORTHERN GULF OF CALIFORNIA. THE TROUGH 
IS FORECAST TO MOVE LITTLE OVER THE NEXT 48 HOURS. UPSTREAM...A 
RIDGE ALOFT IS LOCATED FROM NEAR 15N TO 26N W OF 130W AND IS 
AMPLIFYING NORTHWARD. THE AXIS IS LOCATED ALONG 136W. LIGHT 
EASTERLY FLOW ALOFT IS LOCATED OVER THE TROPICS S OF 10N. AT THE 
SURFACE A 1027 MB HIGH IS POSITIONED NEAR 35N136W AND IS NEARLY 
STATIONARY. A SURFACE TROUGH IS LOCATED FROM 14N109W TO 10N115W. 
IN THE AREA FROM 12N TO 27N W OF 128W NE TO E WINDS ARE IN THE 
20 TO 25 KT RANGE WITH SEAS 8 TO 10 FT. ALSO...N OF 27N BETWEEN 
120W AND 136W N TO NE WINDS ARE 20 TO 25 KT AND SEAS 8 TO 10 FT. 

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 1007 MB LOW IS CENTERED OFF THE COAST OF COSTA RICA 
NEAR 09N87W. IT IS FORECAST TO MOVE LITTLE OVER THE NEXT 24 
HOURS. 

$$
CAB