000
AXPZ20 KNHC 142131
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SUN SEP 14 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...

A TROPICAL WAVE ALONG 100W FROM 05N TO 14N IS MOVING W ABOUT 10 
KT. THE WAVE IS WEAK AND DISORGANIZED WITH MOST OF THE 
CONVECTION TIED TO THE ITCZ AND LOCATED EITHER SIDE OF THE WAVE 
AXIS.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 08N77W TO 11N116W TO 08N140W. 
SCATTERED MODERATE ISOLATED STRONG CONVECTION IS LOCATED N OF 
05N E OF 87W. SCATTERED MODERATE CONVECTION IS LOCATED FROM 06N 
TO 11N BETWEEN 97W AND 109W. SCATTERED MODERATE CONVECTION IS 
LOCATED WITHIN 150 NM OF AXIS BETWEEN 125W AND 134W.

...DISCUSSION...

W OF 110W...
STRONG SUBSIDENCE AS INDICATED BY WATER VAPOR IMAGERY COVERS A 
LARGE PART OF THE AREA W OF 110W N OF A LINE FROM SOUTHERN BAJA 
CALIFORNIA TO 15N125W TO 15N140W. BROAD ANTICYCLONIC FLOW ALOFT 
IS LOCATED APPROXIMATELY FROM 16N TO 25N W OF 125W. A LARGE 
MIDDLE/UPPER LEVEL CYCLONIC CIRCULATION IS LOCATED OFF THE W 
COAST OF THE UNITED STATES NEAR 38N130W WITH A TROUGH AXIS 
EXTENDING S FROM THE CIRCULATION CENTER TO 27N129W. CYCLONIC 
FLOW IS LOCATED N OF 27N BETWEEN 120W AND 135W. EASTERLY WINDS 
ALOFT COVER THE DEEP TROPICS S OF ABOUT 14N AND ARE STRONGEST W 
OF 125W. AT THE SURFACE SOUTHERLY SWELLS TO 9 FT ARE LOCATED S 
OF 10N BETWEEN 110W AND 125W.

E OF 110W...
A WELL-DEFINED MIDDLE/UPPER LEVEL CYCLONIC CIRCULATION IS 
LOCATED OVER THE CENTRAL GULF OF MEXICO. A TROUGH AXIS EXTENDS 
THROUGH THE GULF OF TEHUANTEPEC TO NEAR 10N100W. NORTHEAST WINDS 
ALOFT ARE LOCATED S OF 10N BETWEEN 90W AND 110W. SATELLITE CLOUD 
DRIFT WINDS MEASURE UP TO 40 KT IN THIS AREA. SCATTERED MODERATE 
CONVECTION IS LOCATED FROM 12N TO 19N BETWEEN 98W AND 105W. AT 
THE SURFACE SOUTHERLY SWELLS TO 9 FT ARE LOCATED S OF 10N 
BETWEEN 82W AND 110W.

$$
CAB