000
AXPZ20 KNHC 211910
TWDEP 

TROPICAL WEATHER DISCUSSION...RETRANSMITTED
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC FRI APR 21 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...ITCZ...
ITCZ AXIS IS CENTERED ALONG 6N77W 7N105W 5N140W. SCATTERED 
MODERATE ISOLATED STRONG WITHIN 60 NM EITHER SIDE OF AXIS FROM 
130W TO 132W AND FROM 6N TO 9N FROM 134W TO 138W.

...DISCUSSION...
A RATHER SHARP MID/UPPER TROUGH WITH AXIS EXTENDING FROM A MID 
TO UPPER LEVEL CYCLONIC CIRCULATION NEAR 32N126W TO 20N130W.
SATELLITE DERIVED WINDS INDICATE A 90-100 KT JET STREAM ALONG 
THE BASE OF THE TROUGH FROM 18N140W TO 17N130W WHERE IT SPLITS 
THE SOUTHERN PORTION CONTINUES TO 13N121W WHILE THE NORTHERN 
PART EXTENDS NE TO THE NORTHERN BAJA PENINSULA. TROPICAL 
MOISTURE S OF THE JET AXIS IS BEING ADVECTED NE TOWARD BAJA 
CALIFORNIA. E OF THE TROUGH IS A MID/UPPER LEVEL RIDGE WITH AXIS 
FROM THE NEW MEXICO/ARIZONA BORDER ACROSS WESTERN MEXICO TO 20N. 

UPPER LEVEL TROUGH IN THE EASTERN PACIFIC EXTENDS FROM 16N112W 
TO 30N104W. MODERATE TO STRONG SUBSIDENCE AND DRY STABLE 
CONDITIONS IS S OF 20N E OF 105W...WITH VERY MINIMAL SHOWER 
ACTIVITY NOTED IN THE AREA. BROAD UPPER LEVEL RIDGE WITH AXIS 
FROM EQ AT 85W NE ACROSS CENTRAL INTO THE SW CARIBBEAN.

$$
DGS