000
AXPZ20 KNHC 171551
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC MON DEC 17 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 
1530 UTC.
 
...ITCZ...

INTERTROPICAL CONVERGENCE ZONE AXIS IS CENTERED ALONG 6N78W 
5N90W 9N110W 8N125W 8N140W. NO SIGNIFICANT CONVECTION NOTED 
ALONG AXIS.

...DISCUSSION...

W OF 105W...
A MIDDLE/UPPER LEVEL TROUGH STRETCHES NORTHEAST TO SOUTHWEST 
ACROSS THE NORTHERN PART OF THE DISCUSSION AREA. THE AXIS 
EXTENDS THROUGH 32N118W TO 26N130W TO 23N140W. WATER VAPOR 
IMAGERY INDICATES STRONG SUBSIDENCE WITHIN FOUR TO FIVE DEGREES 
EITHER SIDE OF THE AXIS. FURTHER SOUTH A STRONG JET AXIS IS 
LOCATED THROUGH 18N140W TO 20N130W TO 26N120W. IT THEN CUTS 
ACROSS THE N CENTRAL BAJA CALIFORNIA PENINSULA INTO W TEXAS 
WHERE IT WEAKENS. SOUTHWESTERLY WINDS ALOFT ARE LOCATED ABOUT 
500 NAUTICAL MILES S OF THE JET AXIS. SATELLITE CLOUD DRIFT 
WINDS ARE HIGHEST BETWEEN 110W AND 130W WITH SPEEDS APPROACHING 
100 KNOTS. BROAD RIDGING ALOFT COVERS THE DEEP TROPICS S OF 
ABOUT 10N W OF 115W. 

E OF 105W...
MODERATE EASTERLY WINDS ALOFT COVER THE AREA FROM THE CENTRAL 
AMERICA COAST WESTWARD TO NEAR 105W. AT THE SURFACE A GULF OF 
TEHUANTEPEC GALE EVENT...WITH NORTHERLY WINDS TO 40 KNOTS...WILL 
CONTINUE FOR THE NEXT 36 HOURS. 

$$
CAB