000
AXPZ20 KNHC 291534
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC TUE MAR 29 2011

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 5N117W 1N136W. NO SIGNIFICANT CONVECTION.

...DISCUSSION...
UPPER LEVEL TROUGH EXTENDS FROM 32N120W TO AND ELONGATED 
CYCLONIC CIRCULATION OVER THE FAR NW PORTION OF THE DISCUSSION 
AREA NEAR 29N136W...TROUGH CONTINUES FROM THE CIRCULATION SW TO 
26N140W.
A 90-100 KT JETSTREAM S OF THE TROUGH AXIS EXTENDS FROM 
25N140W TO 22N117W. BROKEN CIRRUS COLDS ARE WITHIN 500 NM S OF 
JET AXIS. S OF JET AN UPPER LEVEL RIDGE DOMINATES THE AREA S OF 
22N W OF 125W. IN THE DEEP TROPICS AN UPPER LEVEL TROUGH WITH 
AXIS FROM 20N111W TO 1N112W. AN UPPER LEVEL RIDGE EXTENDS FROM 
AN ANTICYCLONIC CIRCULATION NEAR 3N90W TO GUATEMALA TO THE 
YUCATAN PENINSULA. MODERATE TO STRONG SUBSIDENCE WITH DRY STABLE 
AIR AT THE MIDDLE AND UPPER LEVELS IS N OF 5N BETWEEN 85W-100W. 
UPPER LEVEL TROUGH IN THE DEEP TROPICS EXTENDS FROM HONDURAS TO 
6N84W. UPPER LEVEL DIFFLUENT FLOW SE OF THE TROUGH IS ENHANCING 
CONVECTION NEAR THE GULF OF PANAMA GENERALLY FROM 4N-8N E OF 83W.

A SURFACE RIDGE COVERS THE AREA N OF 15N W OF 110W. BROKEN TO 
OVERCAST STRATOCUMULUS CLOUDS BLANKET THE AREA WITHIN THE RIDGE.
ELY TRADES TO 20 KT ARE ALONG THE SOUTHERN PERIPHERY OF THE 
RIDGE...FROM  5N-20N W OF 124W. SURFACE TROUGH IS ANALYZED ALONG 
THE ITCZ FROM 11N111W TO 3N116W. A FEW SHOWERS ARE ALONG THE 
TROUGH AXIS. A 1007 MB LOW PRES CENTER IS NEAR 9N86W. TROUGH 
EXTENDS FROM THE LOW TO 3N93W. A FEW SHOWERS ARE ALONG THE 
TROUGH AXIS.

$$
DGS