000
AXPZ20 KNHC 132134
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SAT SEP 13 2008

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 WAVES...

TROPICAL WAVE ALONG 95W FROM 05N TO 14N IS MOVING W ABOUT 10 KT. 
THE WAVE IS WEAK AND DIFFICULT TO IDENTIFY ON THE LATEST 
VISIBLE SATELLITE IMAGERY.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 08N78W TO 07N90W TO 10N105W TO 
10N120W TO 10N131W TO 09N140W. SCATTERED MODERATE CONVECTION IS 
LOCATED FROM 06N TO 09N BETWEEN 84W AND 86W...WITHIN 180 NM S OF 
THE AXIS BETWEEN 98W AND 100W...WITHIN 60 NM N OF THE AXIS 
BETWEEN 129W AND 131W...AND BETWEEN 136W AND 139W.

...DISCUSSION...

W OF 105W...
WATER VAPOR IMAGERY INDICATES SUBSIDENCE OVER THE AREA N OF 15N 
W OF 110W AND IS STRONGEST FROM 20N TO 26N BETWEEN 115W AND 
125W. A MIDDLE/UPPER LEVEL TROUGH IS LOCATED N OF 22N E OF 121W 
INTO NW MEXICO WITH THE AXIS EXTENDING THROUGH 32N115W TO NEAR 
22N119W. THE SOUTHERN END OF A MIDDLE/UPPER LEVEL TROUGH OFF 
THE W COAST OF THE UNITED STATES IS LOCATED N OF 28N W OF 125W 
WITH THE AXIS ALONG 133W...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. OVER THE DEEP TROPICS 
WINDS ARE EASTERLY ALOFT. AT THE SURFACE A TROUGH IS LOCATED 
ALONG 131W FROM 07N TO 13N AND IS MOVING W ABOUT 10 KT. 
SOUTHERLY SWELLS ARE LOCATED S OF 05N BETWEEN 105W AND 125W.

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 30 KT. AN 
ANTICYCLONIC CIRCULATION IS CENTERED OVER MEXICO IN THE VICINITY 
OF 23N100W. 

$$
CAB