000
AXPZ20 KNHC 232213
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SUN MAR 23 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 
2100 UTC.

...ITCZ...
ITCZ AXIS ALONG 2N79W  7N116W  3N140W.  SCATTERED MODERATE 
ISOLATED STRONG WITHIN 240 NM N OF AXIS AND 150 S OF AXIS FROM 
107W-122W.  ISOLATED MODERATE WITHIN 90 NM OF AXIS W OF 126W.

...DISCUSSION...
UPPER LEVELS...
ANTICYCLONE CENTERED AT 7N100W HAS BROAD RIDGE EXTEND NW TO 
30N137W.  W SIDE OF LARGE AMPLITUDE TROUGH FLATTENS NE SIDE OF 
RIDGE WITH 110 KT JET CORE WHILE TROUGH DIGS DEEP INTO E PAC 
FROM 13N87W TO 3N92W.  CONVERGING WINDS MAINTAIN DRY AIR MASS 
ALONG AND 900 NM W OF TROUGH AXIS DUR TO MODERATE TO STRONG 
SUBSIDENCE.  UPPER LEVEL MOISTURE DEBRIS FROM ITCZ BETWEEN 105W 
AND 123W ADVECTED N AND NE BY RIDGE NOW APPROACHING SRN TIP OF 
BAJA CALIFORNIA.  

DOWNSTREAM FROM TROUGH...UPPER LEVEL RIDGE ANCHORED OVER 
CARIBBEAN SEA BLOCKS ANY SIGNIFICANT MOVE E BY TROUGH EVENTUALLY 
WEAKENING IT AND LIFTING IT NE MERGING BOTH RIDGES INTO ONE 
BROAD COVERING E PAC E OF 120W. 

SURFACE...
HIGH PRES CENTER 1029 MB AT 33N133W HAS RIDGE EXTEND SE TO 
15N103W.  RIDGE SUPPORTS MODERATE TRADES W OF 125W AND ENHANCES 
N WINDS ALONG CALIFORNIA COAST WHICH EVENTUALLY ENTER E PAC JUST 
W OF BAJA PENINSULA.  

WINDS OFF COAST OF GULF OF PAPAGAYO CONTINUE THROUGH ENTIRE 
FORECAST PERIOD.

GULF OF TEHUANTEPEC WILL HAVE RESURGENCE OF N GAP WINDS 
EXTENDING S AND SW TO REACH GALE FORCE WITHIN 24 THROUGH 48 HRS.

$$
WALLY BARNES