000
AXPZ20 KNHC 220950
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC TUE JAN 22 2008

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

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.
 
...ITCZ...
ITCZ AXIS ALONG 4N77W 8N125W 7N140W WITH NO SIGNIFICANT CONVECTION.

...DISCUSSION...
A LONGWAVE TROUGH SAGGING SOUTHWARD ALONG THE WEST COAST IS DEFINED 
BY THREE UPPER LOWS EMBEDDED IN THE TROUGH...CENTERED NEAR 38N127W 
33N143W AND 19N151W. THIS TROUGH ANCHORS UPPER LEVEL FLOW ACROSS THE 
NW PORTION OF THE DISCUSSION AREA. THE SUBTROPICAL JET EMERGES FROM 
THE BASE OF THE TROUGH SOUTH OF THE HAWAIIAN ISLANDS AND EXTENDS NE 
ACROSS BAJA CALIFORNIA INTO NW MEXICO WITH CLOUD DRIFT WINDS SHOWING 
A MAX OF 100-110 KT BETWEEN 121W AND 132W. THE OTHER PRIMARY FEATURE 
IS A HIGH AMPLITUDE N-S RIDGE AXIS ALONG 109W. THE OVERALL PATTERN IS
SLIGHTLY PROGRESSIVE...BOTH THE TROUGH AND RIDGE ARE MOVING SLOWLY E.
DENSE UPPER MOISTURE IS NOTED UNDER THE RIDGE AND SPREADING NE ACROSS
NORTHERN MEXICO TOWARDS TEXAS.  

ANOTHER TROUGH EXTENDS S INTO THE AREA ALONG 32N84W 17N83W TO NEAR 
THE GALAPAGOS ISLANDS. THE TROUGH SUPPORTS VERY DRY AIR DOMINATING 
THE REGION S OF 22N E OF 105W AND IS SUPPRESSING CONVECTION.
 
SFC PRES GRADIENT CONTINUES TO SUPPORT N 20-30 KT WINDS IN AND JUST 
DOWNSTREAM OF GULF OF PAPAGAYO THE NEXT 12-24 HOURS THEN DIMINISHING 
TO 20 KT IN 24-48 HOURS.

$$
MUNDELL