000
AXPZ20 KNHC 210938
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 
1005 UTC SAT APR 21 2007

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS 
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND 
METEOROLOGICAL ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY 
THROUGH 0915 UTC.

...ITCZ...

AXIS IS ALONG 8N78W 5N100W 6N115W 6N125W 5N140W AND HAS BECOME 
MUCH MORE CONVECTIVELY ACTIVE IN THE PAST 24 HOURS. SCATTERED 
MODERATE ISOLATED STRONG CONVECTION IS LOCATED FROM 4N TO 8N 
BETWEEN 87W AND 92W. SCATTERED STRONG CONVECTION IS LOCATED 
WITHIN 90 NM EITHER SIDE OF A 5.5N101W 5N110.5W LINE...WITHIN 45 
NM EITHER SIDE OF A 4.5N118W 7.5N123W LINE...AND WITHIN 120 NM 
EITHER SIDE OF A 7N127.5W 2.5N131.5W LINE.

...DISCUSSION...

A MIDDLE/UPPER LEVEL TROUGH COVERS THE AREA N OF 25N E OF 130W 
WITH THE AXIS ALONG 115W. AN ASSOCIATED WEAKENING COLD FRONT 
EXTENDS FROM THE NORTHERN BAJA CALIFORNIA PENINSULA TO 26N120W 
TO NEAR 26N139W. THE FRONT IS IDENTIFIED BY A ONE TO TWO DEGREE 
WIDE BAND OF LOW/MIDDLE LEVEL CLOUDS. SOUTHWESTERLY WINDS ALOFT 
COVER THE CENTRAL PART OF THE DISCUSSION AREA FROM ABOUT 12N TO 
22N E OF 140W INTO MEXICO WITH CLOUD DRIFT WINDS BETWEEN 120W 
AND 130W IN THE 60 TO 70 KNOT RANGE. BROAD RIDGING ALOFT COVERS 
THE DEEP TROPICS S OF ABOUT 10N W OF 110W.

$$
CAB