000
AXPZ20 KNHC 062152
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SUN DEC 06 2009

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 IS ALONG THE LINE...06N77W TO 
10N115W TO 09N140W. SCATTERED MODERATE CONVECTION IS WITHIN 100 
NM OF THE POINT 10N110W. SCATTERED MODERATE TO STRONG CONVECTION 
IS WITHIN 50 NM EITHER SIDE OF THE LINE FROM 11.5N120W TO 
07.5N127W.

OTHER CONVECTION NORTH OF THE ITCZ...
SCATTERED MODERATE TO STRONG CONVECTION IS WITHIN 60 NM EITHER 
SIDE OF LINE FROM 18N102W TO 15N106.5W.

...DISCUSSION...

FOR THE NEXT SEVERAL DAYS MODERATE WESTERLIES WILL BE FROM 20N 
TO 25N WITH MODERATE TO STRONG WESTERLIES NORTH OF 25N. EMBEDDED 
STRONG SHORTWAVE IS OVER THE WESTERN PART OF THE AREA WITH THE 
SHORTWAVE EXTENDING SOUTH TO THE ITCZ WEST OF THE AREA. DRY 
MIDDLE AND UPPER LEVELS ARE NORTHWEST OF THE WAVE AXIS. A PLUME 
OF MIDDLE AND UPPER LEVEL MOISTURE IS EMANATING FROM ITCZ AND IS 
OVER THE WESTERN PART OF THE AREA SOUTH OF THE SHORTWAVE. 

OTHERWISE A VERY BROAD RIDGE IS OVER THE AREA.

COLD FRONT 30N135W TO 26N140W. WEAK RIDGE IS ELSEWHERE NORTH OF 
17N WEST OF 110W. REMAINDER OF THE AREA IS ANALYZED AS BROAD 
TROUGH.

GAP NORTHEAST TO EAST WINDS OF 20 TO OCCASIONALLY 25 KT ARE IN 
AND ABOUT 240 NM DOWNSTREAM FROM THE GULF OF PAPAGAYO. THESE 
WINDS WILL CHANGE LITTLE IN THE NEXT COUPLE OF DAYS.

$$
LL