000
AXPZ20 KNHC 051512
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC WED MAY 05 2010

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...ITCZ...
AXIS IS ALONG 9N85W 7N95W 9N105W 4N125W 5N140W. NO SIGNIFICANT 
CONVECTION.

...DISCUSSION...
AN UPPER LEVEL TROUGH OVER THE NW PORTION OF THE DISCUSSION 
EXTENDS 32N128W TO 24N140W. UPPER LEVEL MOISTURE IS BEING 
ADVECTED WITHIN 180 NM E OF THE TROUGH. A WEAKENING UPPER LEVEL 
RIDGE EXTENDS FROM 30N123W TO 13N135W WHICH IS FLATTENING AS THE 
TROUGH TO THE W APPROACHES. UPPER LEVEL TROUGH AXIS EXTENDS FROM 
22N122W TO 10N122W TO THE EQUATOR AT 120W. MODERATE TO STRONG
SUBSIDENCE WITH DRY STABLE CONDITIONS COVERS THE AREA FROM THE
ITCZ TO 20N W OF 120W

A LARGE UPPER LEVEL ANTICYCLONIC CIRCULATION IS CENTERED OVER 
MEXICO NEAR 19N98W WITH A RIDGE AXIS EXTENDING TO THE NW ACROSS 
MEXICO TO SE ARIZONA AND TO THE SW TO NEAR 10N110W. A NEARLY 
STATIONARY UPPER LEVEL CYCLONIC CIRCULATION IS CENTERED IN THE 
NW CARIBBEAN WITH AN UPPER TROUGH EXTENDING ACROSS NICARAGUA AND 
PANAMA INTO THE E PACIFIC NEAR 06N90W.

SURFACE RIDGE COVERS THE AREA N OF 15N W OF 115W. TRADES AROUND 
20 KT CONTINUE N OF 8N W OF 125W. SURFACE TROUGH IS ANALYZED 
ALONG THE ITCZ FROM 11N105W TO 3N108W. A FEW SHOWERS ARE ALONG 
THE TROUGH N OF 6N.

$$
DGS