000
AXPZ20 KNHC 052131
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC FRI JAN 04 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 2045 UTC.
 
...ITCZ...

INTERTROPICAL CONVERGENCE ZONE...ALONG 3N78W 4N88W 3N96W 9N126W 
7N140W. SCATTERED MODERATE CONVECTION IS LOCATED WITHIN 30 NM OF 
AXIS FROM 107W TO 120W AND WITHIN 120 NM N OF AXIS FROM 120W TO 
131W.

...DISCUSSION...

N OF 22N...
THE SOUTHERN END OF A MIDDLE/UPPER LEVEL TROUGH ALONG AND OFF 
THE WEST COAST OF THE UNITED STATES COVERS THE AREA N OF 22N E 
OF 132W WITH THE TROUGH AXIS ALONG 125W. MOVING UPSTREAM BROAD 
RIDGING ALOFT IS LOCATED N OF 22N W OF 132W. WATER VAPOR IMAGERY 
FROM GOES-11 INDICATES STRONG SUBSIDENCE IN THIS AREA. AT THE 
SURFACE NORTHERLY SWELLS FROM A MAJOR STORM SYSTEM N OF THE 
DISCUSSION AREA ARE LOCATED W OF ABOUT 100W.

S OF 22N...
WESTERLIES ALOFT ARE LOCATED ABOUT EIGHT DEGREES S OF A LINE 
FROM NEAR 17N130W TO 20N120W TO THE MEXICAN COAST AT 22N. 
SATELLITE CLOUD DRIFT WINDS IN THE AREA ARE IN THE 40 TO 50 KNOT 
RANGE. A WEAK UPPER LEVEL CYCLONIC CIRCULATION IS CENTERED IN 
THE VICINITY OF 10N138W...DRIFTING W. ANOTHER BRANCH OF 
WESTERLIES ALOFT IS LOCATED FROM THE EQUATOR TO 5N W OF ABOUT 
115W WITH WIND SPEEDS MEASURING IN THE 60 TO 70 KNOT RANGE.
STRONG SUBSIDENCE ALOFT IS LOCATED E OF 100W TO THE CENTRAL AND 
SOUTH AMERICA COASTLINES. 

$$
CAB