000
AXPZ20 KNHC 092206
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC WED JAN 09 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 
2130 UTC.
 
...ITCZ...
INTERTROPICAL CONVERGENCE ZONE...5N77W 6N83W 4N94W 6N113W 4N135W
4N140W.  NO SIGNIFICANT CONVECTION.

...DISCUSSION...
SURFACE HIGH PRES 1027 MB IS CENTERED NEAR 29N134W. SHIP 
OBSERVATIONS AND SCATTEROMETER DATA SHOW BROAD AREA OF TRADES 
MAINLY W OF 120W S OF SURFACE HIGH. ALOFT...FAIRLY AMPLIFIED 
PATTERN REMAINS IN PLACE FOR THE NEXT COUPLE OF DAYS. WITH A 
TROUGH EXTENDING FROM NORTHERN YUCATAN TO NEAR 11N140W...AHEAD 
OF AN UPPER RIDGE NE OF THE HAWAIIAN ISLANDS. THE RIDGE WILL 
BUILD E THROUGH TONIGHT...CUTTING OFF AN UPPER LOW NEAR 15N135W. 
THIS SETS UP A REX BLOCK PATTERN OVER THE WESTERN PORTION OF THE 
DISCUSSION AREA AND LEAVES WEAK UPPER TROUGH IN PLACE OVER NW 
MEXICO. ATMOSPHERE REMAINS GENERALLY DRY E OF 110W...AND EVEN 
MORE DRY W OF 130W WITH SUBSIDENT NLY FLOW ALOFT. SHOWER 
ACTIVITY MAY PICK UP A LITTLE OVER ITCZ BETWEEN 110W AND 
130W...EAST OF THE UPPER LOW...BUT OTHERWISE THE PATTERN WILL 
REMAIN FAIRLY STATIC THROUGH 48 HOURS. 

CHRISTENSEN