000
AXPZ20 KNHC 070324
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SUN DEC 07 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 05N77W TO 07N100W TO 09N120W TO 10N135W TO 
08N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION IS 
LOCATED WITHIN A 60 NM RADIUS OF 06.5N95.5W AND WITHIN 90 NM 
EITHER SIDE OF A LINE FROM 12N113W TO 08N118W.

...DISCUSSION...

W OF 100W...
A LARGE AND WELL-DEFINED MIDDLE/UPPER LEVEL CYCLONIC CIRCULATION 
IS CENTERED NEAR 23N138W 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 
20N128W 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 33.5N124W AND IS MOVING SLOWLY N. AT THE SURFACE A 
TROUGH IS LOCATED ALONG 137W/138W FROM 16N TO 24N AND A SECOND 
TROUGH IN THE TROPICS IS LOCATED ALONG 116W 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