000
AXPZ20 KNHC 162142
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SUN DEC 16 2007

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 
2130 UTC.
 
...ITCZ...

INTERTROPICAL CONVERGENCE ZONE AXIS IS CENTERED ALONG THE 
LINE...6N78W 6N95W 9N115W 9N130W 10N140W. SCATTERED MODERATE 
WITH ISOLATED STRONG CONVECTION WITHIN 90 NM OF THE POINT 
6N81W.  

...DISCUSSION...
UPPER LEVELS...
MIDDLE AND UPPER LEVEL TROUGH IS OVER THE AREA 
NORTH OF A LINE 20N140W 25N100W.  A STRONG EMBEDDED SHORTWAVE 
WITHIN THE TROUGH IS MOVING OVER NORTHERN BAJA CALIFORNIA AND 
SOUTHERN U.S. CALIFORNIA.  BROKEN TO OVERCAST MULTI LEVEL CLOUDS 
ARE ASSOCIATED WITH THE SYSTEM OVER NORTHWESTERN MEXICO AND 
SOUTHERN CALIFORNIA AND SOUTHERN ARIZONA. A PLUME OF UPPER LEVEL 
MOISTURE WITH BROKEN TO OVERCAST HIGH CLOUDS IS MOVING NORTHEAST 
OVER SOUTHERN BAJA CALIFORNIA. 

AN AREA OF CONVECTION AND MULTI LEVEL CLOUDS IS NORTH OF THE 
ITCZ EAST OF 85W. OTHERWISE THE AREA SOUTH OF A LINE 20N95W TO 
THE ITCZ NEAR 115W TO 5N140W IS DRY AND CLOUD FREE IN THE MIDDLE 
AND UPPER LEVELS. NORTH OF A LINE 20N140W 25N125W 32N120W IS 
ALSO DRY AND CLOUD FREE IN THE MIDDLE AND UPPER LEVELS.  THE 
AREA BETWEEN THE DRY AREAS IS MOIST WITH BROKEN TO OVERCAST 
MIDDLE AND UPPER CLOUDS. 

SURFACE...
MODERATE TROUGH IS NORTH OF THE ITCZ WEST OF 112W. ELSEWHERE 
BROAD TROUGH IS ANALYZED.

GAP WINDS ARE GALE FORCE IN THE GULF OF TEHUANTEPEC. THESE WINDS 
WILL BE LESS THAN GALE FORCE IN 48 HOURS THEN DIMINISH AFTER 48 
HOURS.

GAP WINDS OF 20 KNOTS IN THE GULF OF PAPAGAYO AREA ARE EXPECTED
TO BEGIN IN TWELVE HOURS AND LAST THROUGH 48 HOURS.

$$
LL