000
AXPZ20 KNHC 182046
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC TUE APR 18 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...ITCZ...
ITCZ AXIS IS CENTERED ALONG 6N78W 8N90W 5N110W 3N140W. SCATTERED 
MODERATE 90 NM WIDE 78W TO 92W AND 100W TO 108W.

...DISCUSSION...
BROAD RIDGE OVER THE WESTERN PORTION OF THE AREA W OF 130W...
WITH A UPPER LEVEL ANTICYCLONIC CIRCULATION NEAR 8N132W. A 70 KT 
JET STREAM EXTENDS THROUGH THE RIDGE FROM 20N140W TO 19N132W TO 
15N125W. BROAD AND WEAKENING MID/UPPER LEVEL TROUGH IS OVER THE 
NE PORTION OF THE AREA N OF 21N BETWEEN 110W AND 127W. DRY AIR 
AND ASSOCIATED MODERATE TO STRONG SUBSIDENCE IS NOTED NORTH OF 
11N BETWEEN 110W AND 135W. MID/UPPER LEVEL RIDGE WITH AXIS FROM 
CENTRAL AMERICA ACROSS EASTERN MEXICO THEN INTO TEXAS. EXCEPT 
FOR SOME HIGH LEVEL MOISTURE OVER NORTHERN MEXICO STRONG 
SUBSIDENCE AND DRY AIR IS NOTED N OF THE ITCZ E OF 110W.
SURFACE HIGH PRES RIDGE COVERS THE AREA N OF 13N W OF 110W. 
BROKEN TO OVERCAST STRATUS AND STRATOCUMULUS CLOUDS IS WITHIN 
THE RIDGE. 
 
$$