000
AXPZ20 KNHC 242205
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SAT NOV 24 2007

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...TROPICAL WAVES...
.NONE.
 
...ITCZ...
INTERTROPICAL CONVERGENCE ZONE ALONG...6N77W 6N95W 10N110W 
11N140W.  SCATTERED MODERATE CONVECTION WITHIN 60 NM OF 6N79W.
SCATTERED MODERATE FROM 10N TO 11N BETWEEN 115W AND 120W.

...DISCUSSION...
UPPER LEVELS...
MID-UPPER LEVEL RIDGE WITH AXIS EXTEND FROM 32N125W TO 5N127W.
PLENTY OF MOISTURE BEING ADVECTED NE INTO E PAC BY 100 KT JET 
CORE ON UPSTREAM SIDE OF RIDGE.  DOWNSTREAM...LONGWAVE TROUGH 
DIGS DEEP FROM CYCLONIC VORTEX AT 32N108W TO 8N110W.  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 70W JUST S OF WEAK STATIONARY FRONT 
ACROSS YUCATAN PASSAGE.  

AT THE SURFACE...HIGH PRES 1022 MB AT 35N130W HAS RIDGE EXTEND 
SE TO 15N110W.  WITH THE WEAKENING OF RIDGE NE TRADES HAVE 
ABATED AND ONLY LONG PERIOD SWELL TRAINS REMAIN AFFECTING THE 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