000
AXPZ20 KNHC 190318
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC WED DEC 19 2007

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 
0300 UTC.
 
...ITCZ...
INTERTROPICAL CONVERGENCE ZONE AXIS IS CENTERED ALONG THE 
LINE...6N77W 6N105W 7N140W. SCATTERED MODERATE CONVECTION IS 
WITHIN 120 NM OF THE POINT 9N125.2W.

...DISCUSSION...
UPPER LEVELS...
WELL DEFINED MIDDLE AND UPPER TROUGH IS ALONG AND NORTH OF A 
LINE 19N140W 32N105W. THE AREA WITHIN THE TROUGH REGION 
SOUTH OF 26N AND THE AREA NORTH OF THE TROUGH AXIS E OF 120W IS 
DRY AND CLOUD FREE IN THE MIDDLE AND UPPER LEVELS. A PLUME OF 
MIDDLE AND UPPER LEVEL MOISTURE AND MULTI LEVEL BROKEN TO 
OVERCAST CLOUDS IS WITHIN 600 NM SOUTHEAST OF THE TROUGH LINE 
AND IS ADVECTING NORTHEASTWARD OVER THE NORTHERN HALF OF MEXICO. 
AN AREA OF CONVECTION WITHIN 120 NM OF 9N125.2W IS CONTRIBUTING 
TO THIS AREA OF UPPER LEVEL MOISTURE.

THE AREA SOUTH OF A LINE 22N105W 17N115W 5N118W 5N127W 10N132W 
10N140W IS DRY AND CLOUD FREE IN THE MIDDLE AND UPPER LEVELS 
EXCEPT FOR A SMALL AREA OF CONVECTION NEAR THE ITCZ NEAR 98W.

SURFACE...
WEAK RIDGE IS NORTH OF THE ITCZ WEST OF 110W. ELSEWHERE A BROAD 
TROUGH IS ANALYZED.

GAP WINDS OF 20 TO 25 KNOTS CONTINUE IN THE GULF OF TEHUANTEPEC 
REGION THROUGH 18 HOURS THEN DIMINISH TO LESS THAN 20 KNOTS IN 
24 HOURS.

GAP WINDS IN THE GULF OF PAPAGAYO REGION WILL BE NEAR 20 KT 
THROUGH 42 HOURS THEN DIMINISH AT 48 HOURS.

$$
LL