000
AXPZ20 KNHC 011520
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SAT DEC 01 2007

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

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.
 
...ITCZ...

ITCZ AXIS ALONG 6N78W 7N92W 6N103W 10N120W 11N129W 9N140W. 
SCATTERED MODERATE ISOLATED STRONG CONVECTION IS LOCATED WITHIN 
A 60 NM RADIUS OF 7N92W.  

...DISCUSSION...

W OF 105W...
A LARGE MIDDLE/UPPER LEVEL TROUGH OVER THE WESTERN UNITED STATES 
EXTENDS SOUTHWARD TO ABOUT 24N. THE TROUGH AXIS IS LOCATED ALONG 
123W WITH WATER VAPOR IMAGERY INDICATING CYCLONIC FLOW N OF 24N 
E OF 132W INTO MEXICO. AN ASSOCIATED SURFACE TROUGH IS LOCATED 
FROM THE NORTHERN GULF OF CALIFORNIA TO 24N113W TO 18N115W. A 
SOUTHERLY JET IS LOCATED FROM NEAR 18N116W TO 25N113W THROUGH 
30N108W. SATELLITE CLOUD DRIFT WINDS INDICATE 70 TO 80 KNOT WIND 
SPEEDS ALONG THE JET AXIS. A WESTERLY JET ENTERS THE AREA AT 
10N140W AND THEN SPLITS NEAR 12N136W WITH THE STRONGER NORTHERN 
BRANCH EXTENDING THROUGH 15N135W TO NEAR 22N130W AND THE 
SOUTHERN BRANCH DIVING SE TO THE EQUATOR AT 128W. SOUTHERLY 
SURFACE WINDS ARE EXPECTED TO INCREASE OVER THE NW PART OF THE 
DISCUSSION AREA WITHIN 12 HOURS AND GALE CONDITIONS TO BEGIN 
WITHIN 30 HOURS. AT DAY TWO WINDS WILL BE AS HIGH AS 40 KNOTS 
AND SEAS TO 24 FEET.

E OF 105W...
WATER VAPOR IMAGERY INDICATES STRONG SUBSIDENCE E OF 105W WITH  
SOUTHEASTERLY WINDS ALOFT IN THE 20 TO 30 KNOT RANGE.

$$
CAB