000
AXPZ20 KNHC 172056
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC MON APR 17 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 ALONG 4N78W 4N90W 6N120W 7N140W. SCATTERED MODERATE 
TO STRONG 120 NM WIDE FROM 120W TO 140W.

...DISCUSSION...
MOSTLY DRY AIR AND SUBSIDENCE COVERS THE AREA NW OF LINE 20N240W 
21N127W 29N112W. SOME MOISTURE IS BEING ADVECTED ACROSS THE 
SOUTHERN BAJA PENINSULA AND ACROSS CENTRAL MEXICO. HIGH PRESSURE 
IS NOW BUILDING ACROSS THE REGION N OF THE ITCZ W OF 110W. THE 
HIGH IS PRODUCING SOME 20 KT NWLY WINDS ALONG THE W COAST OF 
BAJA PENINSULA AND 20-25 KT TRADES N OF THE ITCZ TO ABOUT 20N.
BROAD WEAK UPPER LEVEL RIDGING AND ANTICYCLONIC FLOW IS SEEN 
SOUTH OF 18N WEST OF ABOUT 125W. THIS RIDGE IS FORECAST TO BUILD 
A LITTLE NORTHWARD DURING THE NEXT 24 HOURS. AN AREA OF DIFLUENT 
FLOW OVER THE ITCZ IS HELPING TO PRODUCE SCATTERED CONVECTION 
ALONG THE AXIS W OF ABOUT 120W. 
THE AREA  BETWEEN 85W AND 110W IS COVERED BY DRY 
AIR/SUBSIDENCE. SOME HIGH LEVEL MOISTURE IS BEING ADVECTED FROM 
SOUTH AMERICA NWWD INTO THE PACIFIC E OF 85W. 
 
$$