000
AXPZ20 KNHC 160256
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC TUE DEC 16 2008

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN
FROM THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0230 UTC.

...ITCZ...
INTERTROPICAL CONVERGENCE ZONE...03N78W TO 07N105W TO 08N125W TO 
06N140W. SCATTERED MODERATE CONVECTION IS ALONG THE ITCZ AXIS 
FROM 98W TO 133W.

...DISCUSSION...
DEEP LAYER TROUGH AXIS IS ALONG THE LINE TROUGH 30N102W TO 
25N115W TO 25N125W TO 15N130W TO 14N140W. EXCEPT FOR UPPER LEVEL 
MOISTURE BUT NO CLOUDS N OF 28N EAST OF 132W THE AREA NORTH AND 
WEST OF THE TROUGH AXIS IS DRY AND CLOUD FREE IN THE MIDDLE AND 
UPPER LEVELS. THIS FEATURE IS EXPECTED TO REMAIN IN PLACE 
THROUGH AT LEAST 3 TO 4 DAYS. SOME MINOR SURFACE TROUGH 
DEVELOPMENT IS FORECAST IN THE WESTERN ITCZ REGION DUE TO THIS 
TROUGH. A BROAD PLUME OF UPPER LEVEL MOISTURE WITH AREAS OF 
UPPER CLOUDINESS EXTENDS WITHIN 800 NM SE OF THE TROUGH AXIS AND 
IS ADVECTING OVER MEXICO NORTH OF 20N.

REMAINDER OF THE MIDDLE AND UPPER LEVELS IS COVERED BY BROAD 
ANTICYCLONIC FLOW.

NORTH OF 20N WEST OF 115W THE AREA IS COVERED BY BROKEN TO 
OVERCAST STRATOCUMULUS CLOUDS. SOUTH OF THE ITCZ BROKEN 
STRATOCUMULUS ARE OBSERVED ACROSS THE ENTIRE AREA.

WEAK SURFACE RIDGE IS NORTH OF 14N WEST OF 110W. REMAINDER OF 
THE AREA IS UNDER BROAD CYCLONIC FLOW.

GAP WINDS OF 20 TO OCCASIONALLY 25 KNOTS AND SEAS AT OR JUST 
BELOW 8 FT WILL CONTINUE IN THE GULF OF PAPAGAYO REGION 
EXTENDING W TO SW...TO NEAR 94W THROUGH AT LEAST 48 HOURS.

$$
LL