000
AXPZ20 KNHC 202121
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SUN JAN 20 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 IS CENTERED ALONG 5N77W 7N85W 4N100W 10N130W 6N140W. 
NO SIGNIFICANT CONVECTION.

...DISCUSSION...

W OF 100W...
THE SOUTHERN END OF A MIDDLE/UPPER LEVEL TROUGH OVER THE WESTERN 
UNITED STATES AND CONTINUING OFFSHORE COVERS THE AREA N OF 25N E 
OF 130W WITH THE AXIS ALONG 124W. A LARGE AREA OF WESTERLIES 
ALOFT COVERS THE PACIFIC S OF ABOUT 25N TO THE EQUATOR. THE 
STRONGEST WINDS ARE LOCATED FROM 12N TO 23N WITH SATELLITE CLOUD 
DRIFT WINDS INDICATING SPEEDS IN THE 70 TO 80 KNOT RANGE. 
INFRARED SATELLITE IMAGERY SHOWS DENSE LAYERED CLOUDS FROM 10N 
TO 20N W OF 127W. 

E OF 100W...
THE WESTERLIES ALOFT MENTIONED ABOVE CONTINUE INTO THE EASTERN 
PART OF THE DISCUSSION AREA WITH WATER VAPOR IMAGERY INDICATING 
STRONG SUBSIDENCE E OF 100W AND CONTINUING ACROSS CENTRAL 
AMERICA INTO THE CARIBBEAN. AT THE SURFACE A STORM WARNING IS IN 
EFFECT OVER THE GULF OF TEHUANTEPEC. WINDS ARE EXPECTED TO DROP 
BELOW WARNING CRITERIA IN 24 HOURS.

$$
CAB