000
AXPZ20 KNHC 211519
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC FRI DEC 21 2007

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

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.
 
...ITCZ...
INTERTROPICAL CONVERGENCE ZONE IS CENTERED ALONG...5N77W 6N105W 
9N110W 9N140W. SCATTERED MODERATE CONVECTION IS WITHIN 60 NM OF 
THE FOLLOWING POINTS 9.5N110W AND 11N121W AND 8N122W AND 
7.5N129W. SCATTERED MODERATE CONVECTION IS WITHIN 75 NM OF THE 
POINT 10N114W.

...DISCUSSION...
STRONG SHORTWAVE IS MOVING EAST OVER NORTHWEST MEXICO. SOME 
SCATTERED TO BROKEN MULTI LEVEL CLOUDS ARE OVER MEXICO WELL EAST 
OF THE SHORTWAVE EAST OF THE SIERRAS. BROADER TROUGH IS NORTH OF 
22N EAST OF 130W. MOST OF THIS AREA IS DRY AND CLOUD FREE IN THE 
MIDDLE AND UPPER LEVELS.

REMAINDER OF THE AREA IS COVERED BY BROAD ANTICYCLONIC FLOW.
UPPER LEVEL MOISTURE AND SCATTERED HIGH CLOUDS ARE WEST OF 133W
AND ARE EMANATING FROM A CLUSTER TSTMS JUST W OF THE AREA. 

DRY AND CLOUD FREE MIDDLE AND UPPER LEVELS ARE NOTED EAST OF 
105W.

SURFACE...
MODERATE RIDGE IS NORTH OF THE ITCZ WEST OF 113W. ELSEWHERE 
BROAD TROUGH IS ANALYZED. 

BROKEN TO OVERCAST STRATOCUMULUS COVERS A LARGE AREA NORTH OF 
THE ITCZ WEST OF 115W.

OCCASIONAL GAP WINDS OF NEAR 20 KT ARE FORECAST THROUGH 48 HOURS 
IN THE GULF OF PAPAGAYO REGION. 

$$
LL