000
AXPZ20 KNHC 262208
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC WED NOV 26 2008

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 
2145 UTC.

...ITCZ...
INTERTROPICAL CONVERGENCE ZONE AXIS ALONG 08N82W TO 04N93W TO 
08N120W TO 08N135W TO 06N140W.  SCATTERED MODERATE CONVECTION 
WITHIN 90 NM OF AXIS FROM 116W-126W.

...DISCUSSION...
UPPER LEVEL TROUGH OFF SRN CALIFORNIA COAST EXTENDS FROM 
CYCLONIC VORTEX AT 33N121W TO 22N124W.  ASSOCIATED 1008 SURFACE 
LOW PRES ALONG CALIFORNIA COAST MOVING INLAND WITH SURFACE 
TROUGH FROM 30N116W TO 15N125W.  HIGH PRES 1028 MB AT 29N143W 
BUIDS E INCREASING GRADIENT JUST N OF ITCZ WITH NE TRADE WINDS 
INCREASING THROUGH FORECAST PERIOD. 

WEAK 1011 MB SURFACE LOW PRES CENTERED AT 06N86W...PART OF BROAD 
CIRCULATION THAT EXTENDS INTO SW CARIBBEAN.  CYCLONIC FLOW 
AROUND CIRCULATION ENHANCING GAP WINDS THROUGH GULF OF PAPAGAYO 
...WHERE SHIPS AND ASCAT DATA SHOWED 20 TO 25 KT THIS MORNING. 
IN ADDITION...SHIP OBSERVATIONS INDICATE 15 TO 20 KT FLOW ON E 
SIDE OF LOW PRES FROM GALAPAGOS TO PANAMA...ENHANCING MODEST 
CONVECTIVE BUILD UPS ALONG ITCZ. 

SURFACE TROUGH INTERSECTS ITCZ NEAR 127W...ON TRAILING EDGE OF 
SURFACE TROUGH MENTIONED EARLIER.  THIS PROMPTS CONVECTION...AS 
WELL AS ENHANCING TRADE WIND FLOW S OF SURFACE HIGH.  TROUGH 
DISSIPATE INTO FRI AS UPPER LIFTS OUT.

$$
WALLY BARNES