000
AXPZ20 KNHC 090917
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SUN APR 09 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY 
THROUGH 0900 UTC.

...ITCZ...
ITCZ AXIS 7N78W 6N90W 5N125W 5N140W. SCATTERED MODERATE TO 
STRONG WITHIN 150 NM S OF AXIS FROM 90W TO 95W AND WITHIN 200 NM 
N OF AXIS FROM 135W-140W.
 
...DISCUSSION...
MID/UPPER LEVEL THROUGH EXTENDS FROM 32N132W TO 25N140W. A 
90-100 KT JET STREAM IS SE OF THE TROUGH FROM 19N140W 25N127W
TO THE NORTHERN BAJA PENINSULA. A BAND OF MODERATE TO STRONG 
SUBSIDENCE IS WITHIN 240 NM NW OF THE JET. AN UPPER LEVEL 
ANTICYCLONIC CIRCULATION IS NEAR 12N113W WITH RIDGE EXTENDING 
NWD FROM THE CIRCULATION TO THE BAJA PENINSULA AND INTO ARIZONA. 
TROPICAL MOISTURE IS BEING ADVECTED NE ON THE SW FLOW BETWEEN 
THE RIDGE AND THE TROUGH. A MID/UPPER LEVEL TROUGH WITH AXIS 
FROM THE BAY OF CAMPECHE INTO SOUTHERN MEXICO THEN INTO THE 
PACIFIC NEAR 3N103W. STRONG SUBSIDENCE AND ASSOCIATED DRY AIR AT 
THE MID AND UPPER LEVELS IS S OF 15N BETWEEN 95W-115W. AN UPPER 
LEVEL RIDGE COVERS THE AREA E OF THE TROUGH. UPPER LEVEL 
DIFFLUENCE IS ENHANCING CONVECTION ALONG THE ITCZ FROM 89W-94W.

A 1021 MB SURFACE PRES IS CENTERED NEAR 29N126W WITH RIDGE FROM 
THE HIGH TO 20N115W. SURFACE TROUGH ALONG THE ITCZ FROM 10N119W 
TO 3N121W. WIDELY SCATTERED SHOWERS AND TSTMS ARE WITHIN 180 NM 
W OF THE TROUGH N OF THE ITCZ AND 150 NM E OF THE TROUGH S OF 
THE ITCZ.

$$
DGS