000
AXPZ20 KNHC 131521
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SAT SEP 13 2008

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.

...TROPICAL WAVES...

TROPICAL WAVE ALONG 94W FROM 06N TO 14N IS MOVING W 10 TO 15 KT. 
THE WAVE IS WEAK AND DIFFICULT TO IDENTIFY ON EARLY MORNING 
VISIBLE SATELLITE IMAGERY.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 06N77W TO 06N110W TO 08N140W. 
SCATTERED MODERATE TO STRONG CONVECTION IS LOCATED WITHIN 75 NM 
OF 07.5N83W. SCATTERED MODERATE ISOLATED STRONG CONVECTION IS 
LOCATED WITHIN 60 NM OF 06N92W AND 11N128W.

...DISCUSSION...

W OF 105W...
WATER VAPOR IMAGERY INDICATES SUBSIDENCE OVER THE AREA N OF 15N 
W OF 108W AND IS STRONGEST FROM 20N TO 28N BETWEEN 115W AND 
130W. A MIDDLE/UPPER LEVEL TROUGH IS LOCATED N OF 22N E OF 122W 
INTO NW MEXICO WITH THE AXIS EXTENDING THROUGH 32N116W TO NEAR 
22N118W. ANOTHER MIDDLE/UPPER LEVEL TROUGH IS LOCATED N OF 28N W 
OF 128W WITH THE AXIS ALONG 135W...MOVING E ABOUT 15 KT. TO THE 
S OF THIS FEATURE AN ANTICYCLONIC CIRCULATION ALOFT IS CENTERED 
NEAR 23N135W AND IS NEARLY STATIONARY. THIS FEATURE IS FORECAST 
TO DRIFT SLOWLY N OVER THE NEXT TWO DAYS. AT THE SURFACE A 
TROUGH IS LOCATED 131W FROM 07N TO 13N AND IS MOVING W ABOUT 10 
KT. SOUTHWESTERLY SWELLS TO 8 FT ARE LOCATED S OF 05N E OF 120W. 

E OF 105W...
EASTERLY WINDS ALOFT ARE LOCATED OVER MOST OF THE E PART OF THE 
DISCUSSION AREA. SATELLITE CLOUD DRIFT WINDS ARE HIGHEST S OF 
08N BETWEEN 95W AND 105W AND MEASURE UP TO 35 KT. AN 
ANTICYCLONIC CIRCULATION IS CENTERED OVER MEXICO IN THE VICINITY 
OF 22N100W. 

$$
CAB