000
AXPZ20 KNHC 251007
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC TUE DEC 25 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 ALONG 7N77W 9N86W 7N99W 9N112W 
8N140W.  SCATTERED MODERATE WITHIN 120 N OF AXIS FROM 108W TO 135W. 

...DISCUSSION...
UPPER LEVELS...
UPPER LEVEL TROUGH AXIS FROM 32N115W 20N130W MAINTAIN DRY AIR MASS N 
OF 20N W OF 112W.  TROUGH WEAKENS AND SHIFT NE AS UPPER LEVEL RIDGE 
OVER CENTRAL AMERICA REMAINS STEADFAST IN PLACE.  PLUME OF UPPER 
LEVEL TROPICAL MOISTURE MOVES E ACROSS MEXICO RIDING ON 110 KT JTST. 
UPSTREAM FROM TROUGH...UPPER LEVEL RIDGE ALONG 137W ENTERS E PAC 
FEEDING MORE MOISTURE TO TROUGH BASE AND ALLOWING SOME SCATTERED 
MODERATE CONVECTION ALONG ITCZ W OF 120W.  

AT THE SURFACE...
STRONG RIDGE 1037 MB AT 38N130W PRODUCING STRONG TRADES N OF 10N W 
OF 120W AND FUNNELING WINDS INTO GULF OF CALIFORNIA.

WINDS IN GULF OF TEHUANTEPEC EXPECTED TO CONTINUE DIMINISHING AND 
BECOME LESS THAN 20 KT WITHIN 30-36 HRS.

WINDS ACROSS GULF OF PAPAGAYO EXPECTED TO REMAIN THROUGH FORECAST 
PERIOD AS CARIBBEAN RIDGE REMAINS STRONG IN PLACE.

$$
WALLY BARNES