000
AXPZ20 KNHC 250410
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SUN NOV 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.

...TROPICAL WAVES...
.NONE.
 
...ITCZ...
INTERTROPICAL CONVERGENCE ZONE ALONG...9N84W 7N93W 9N102W  
10N138W 11N140W.  SCATTERED MODERATE CONVECTION WITHIN 60 NM OF 
AXIS FROM 104W TO 109W.  SCATTERED MODERATE FROM 10N TO 11N 
BETWEEN 116W AND 120W.

...DISCUSSION...
UPPER LEVELS...
MID-UPPER LEVEL RIDGE WITH AXIS EXTEND FROM 32N123W TO 7N127W.
PLENTY OF MOISTURE BEING ADVECTED NE INTO E PAC BY 105 KT JET 
CORE ON UPSTREAM SIDE OF RIDGE.  DOWNSTREAM...LONGWAVE TROUGH 
DIGS DEEP FROM CYCLONIC VORTEX AT 31N108W TO 7N115W.  CONVERGING 
AIR MASS DRIES ON MODERATE TO STRONG SUBSIDENCE ALONG AND WITHIN 
240 NM OF TROUGH AXIS N OF ITCZ.  SECOND UPPER CYCLONIC VORTEX 
AT 8N84W EXTEND SUBSIDENCE S OF 12N E OF 110W.

MID-UPPER LEVEL ANTICYCLONE OVER NWRN CARIBBEAN BRINGS PLENTY OF 
TROPICAL MOISTURE W OF 68W JUST S OF WEAK STATIONARY FRONT 
ACROSS YUCATAN PASSAGE.  

AT THE SURFACE...DISSIPATING HIGH PRES 1022 MB AT 35N130W HAS 
RIDGE EXTEND SE TO 15N110W.  WITH THE RIDGE GONE NE TRADES ABATE 
AND ONLY LONG PERIOD SWELL TRAINS REMAIN AFFECTING NW PART OF E 
PAC BASIN.  SIMILARLY...GULF OF CALIFORNIA NW WINDS SHOULD 
DIMINISH WITHIN 24 HRS AS DO THE GULF OF PAPAGAYO GAP WINDS. 

$$
WALLY BARNES