000
AXPZ20 KNHC 072123
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC FRI NOV 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 
2100 UTC.

...ITCZ...

THE INTERTROPICAL CONVERGENCE ZONE AXIS IS ALONG THE 
LINE...07N77W TO 06N100W TO 08N115W TO 07N140W. SCATTERED 
MODERATE TO STRONG CONVECTION IS WITHIN 60 NM OF THE POINT 
08N135.5W.

...DISCUSSION...

MIDDLE AND UPPER LEVEL TROUGH WILL BE OVER THE AREA NORTH OF 25N 
THROUGH THE NEXT 48 HOURS. A SHORTWAVE TROUGH EXTENDS ALONG A 
LINE FROM 25N130W TO 20N130W TO 14N140W AND BEYOND. THE 
SHORTWAVE IS MOVING EAST 25 KNOTS. AN ILL DEFINED CYCLONIC 
CIRCULATION CENTER TRAILS THE TROUGH AND LOCATED NEAR 21N135W. 
AHEAD OF THE TROUGH A PLUME OF UPPER LEVEL MOISTURE AND MULTI 
LEVEL BROKEN TO OVERCAST CLOUDS EXTENDS ABOUT 300 NM EAST OF THE 
AXIS. OUTSIDE THE CYCLONIC CIRCULATION CENTER THE ATMOSPHERE IS 
DRY AND CLOUD FREE IN THE MIDDLE AND UPPER LEVELS WEST OF THE 
SHORTWAVE.

REMAINDER OF THE AREA IS A BROAD RIDGE IN THE MIDDLE AND UPPER 
LEVELS. THE AREA SOUTH AND EAST OF A LINE FROM 20N98W TO 13N115W 
TO 07N115W TO 05N140W IS DRY AND CLOUD FREE IN THE MIDDLE AND 
UPPER LEVELS EXCEPT FOR SOME UPPER MOISTURE AND CLOUDS NORTH OF 
THE ITCZ EAST OF 95W.

WEAK SURFACE RIDGE IS NORTH OF 15N WEST OF 113W. ELSEWHERE A 
BROAD TROUGH IS ANALYZED AT THE SURFACE.

$$
LL