000
AXPZ20 KNHC 290321
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SAT APR 29 2006

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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0300 UTC.

...ITCZ...
ITCZ AXIS IS CENTERED ALONG 8N81W 7N100W 7N115W 6N130W 6N140W. 
SCATTERED STRONG CONVECTION WITHIN 90 NM EITHER SIDE OF A 7N115W 
7N120W LINE. SCATTERED MODERATE ISOLATED STRONG CONVECTION FROM 
5N TO 8N BETWEEN 132W AND 135W.

...DISCUSSION...
N OF 15N...
DOMINANT FEATURE ALOFT OVER THE DISCUSSION AREA IS A LARGE  
MIDDLE/UPPER LEVEL TROUGH WITH ITS AXIS EXTENDING FROM A 
CYCLONIC CIRCULATION OVER S CENTRAL NEW MEXICO SW THROUGH  
CENTRAL BAJA CALIFORNIA TO NEAR 15N128W. CYCLONIC FLOW IS 
LOCATED ABOUT 15 DEGREES ON THE E SIDE OF THE TROUGH AXIS AND UP 
TO 20 DEGREES ON THE W SIDE. A JET EXTENDS FROM THE BASE OF THE 
TROUGH NEAR 15N118W THROUGH 28N105W. WINDS ARE STRONGEST N OF 
ABOUT 25N. STRONG SUBSIDENCE IS NOTED UP TO 6 TO 8 DEGREES NW OF 
THE JET AXIS. FURTHER UPSTREAM AN UPPER LEVEL RIDGE COVERS THE 
AREA N OF 18N W OF 130W WITH ITS AXIS LOCATED JUST W OF THE AREA 
ALONG 144W.

S OF 15N...
UPPER LEVEL WESTERLY FLOW COVERS THE DEEP TROPICS W OF 110W. A 
WEAK MIDDLE/UPPER LEVEL TROUGH HAS ITS AXIS ALONG 100W.

$$
CAB