000
AXPZ20 KNHC 230416
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC FRI NOV 23 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 
0315 UTC.

...TROPICAL WAVES...
TROPICAL WAVE ALONG 90W N OF 3N MOVING W 10 KT.  
NO ASSOCIATED DEEP CONVECTION NOTED. 

...ITCZ...
ITCZ AXIS ALONG 9N84W  8N110W  9N127W  8N140W.  SCATTERED 
MODERATE WITHIN 90 NM OF AXIS E OF 85W.  SCATTERED MODERATE/ 
STRONG WITHIN 180 NM OF AXIS FROM 101W-128W.

...DISCUSSION...
UPPER RIDGE ALONG 131W BRING FRESH AMOUNTS OF MOISTURE INTO E 
PAC ON ITS 80 KT JET CORE NOW RUNNING OVER ITS CREST.  WINDS DIG 
SE INTO LONGWAVE TROUGH EXTENDING FROM 32N106W TO 12N116W WITH 
CONVERGING WIND BRINGING AIR MASS SUBSIDENCE ALONG TROUGH AXIS.  
NARROW SWATH OF TROPICAL MOISTURE ADVECTS NE ALONG TROUGH E SIDE 
ACROSS CENTRAL MEXICO INTO SE TEXAS.  OTHERWISE AREA REMAINS 
FAIRLY DRY.  LAST BINGE OF MOISTURE REMAINS OVER CENTRAL AMERICA 
...NICARAGUA AND EASTWARD N OF 7N.  

AT THE SURFACE...HIGH PRES CENTER WELL NORTH OF AREA HAS RIDGE 
DOMINATE MUCH OF AREA N OF 10N PRODUCING MODERATE NE TRADES OVER 
FROM 10N-20N W OF 127W.  COLD FRONT APPROACHING FAR NW PORTION 
OF AREA ALLOWS WINDS TO PICK UP N OF 26N W OF 135W.  MODERATE TO 
LARGE SWELL TRAINS ENCROACH S INTO E PAC WATERS AS FAR S AS 20N 
W OF 115W.

WITH HIGH PRES BUILD UP BEHIND GULF OF MEXICO COLD FRONT... 
STRONG N WINDS EXPECTED TO MAKE IT ACROSS GULF OF TEHUANTEPEC 
WITHIN NEXT 12 HRS.  EVENT SHOULD REACH 20-25 KT AND LAST VERY 
LITTLE AS HIGH PRES MOVES E VERY QUICKLY.  LIKEWISE GULF OF 
PAPAGAYO SHOULD INCREASE AS SAME COLD FRONT REACHES NW CARIBBEAN 
TIGHTENING GRADIENT IN THAT BASIN. 

$$
WALLY BARNES