000
AXPZ20 KNHC 062150
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SAT DEC 06 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 
2115 UTC.

...ITCZ...

ITCZ AXIS ALONG 07N77W TO 07N100W TO 09N120W TO 10N132W TO 
08N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION IS 
LOCATED WITHIN A 60 NM RADIUS OF 06.5N94.5W...WITHIN 60 NM 
EITHER SIDE OF A LINE FROM 07N113W TO 11N118W...AND WITHIN A 90 
NM RADIUS OF 08N126W.

...DISCUSSION...

W OF 100W...
A LARGE AND WELL-DEFINED MIDDLE/UPPER LEVEL CYCLONIC CIRCULATION 
IS CENTERED NEAR 24N138W AND IS MOVING SLOWLY W. A TROUGH AXIS 
EXTENDS SOUTHWARD FROM THE CIRCULATION TO NEAR 12N140W. FROM THE 
BASE OF THE TROUGH A STRONG JET EXTENDS FROM NEAR 12N140W TO 
20N138W INTO SOUTHERN CALIFORNIA AND THEN DIVES SOUTHWARD ACROSS 
CENTRAL MEXICO. SATELLITE CLOUD DRIFT WINDS ALONG THE JET ARE AS 
HIGH AS 100 KNOTS. THIS JET DEFINES THE NORTHERN PERIPHERY OF A 
RIDGE WITH THE AXIS LOCATED 115W. THICK DENSE MIDDLE AND UPPER 
LEVEL CLOUDS LIE W OF THE RIDGE AXIS TO THE JET AXIS. THE RIDGE 
IS FORECAST TO GRADUALLY FLATTEN OUT OVER THE NEXT COUPLE OF 
DAYS. A SECOND MIDDLE/UPPER LEVEL CYCLONIC CIRCULATION IS 
LOCATED NEAR 32.5N125W AND IS MOVING SLOWLY N. AT THE SURFACE A 
TROUGH IS LOCATED ALONG 137W/138W FROM 15N TO 24N AND A SECOND 
TROUGH IN THE TROPICS IS LOCATED ALONG 114W FROM 06N TO 13N.

E OF 100W...
A MIDDLE/UPPER LEVEL TROUGH OVER THE E PART OF THE DISCUSSION 
AREA HAS ITS AXIS ALONG 98W N OF 05N INTO MEXICO. AT THE SURFACE 
WITHIN 45 NM EITHER SIDE OF A LINE FROM 16N95W TO 12N96.5W... 
INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS ARE IN THE 20 
TO 25 KT RANGE WITH SEAS TO 9 FT.

$$
CAB