000
AXPZ20 KNHC 311501
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC WED MAR 30 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 7N81W 3N95W 5N110W 1N140W. N SIGNIFICANT 
CONVECTION.

...DISCUSSION...
UPPER LEVEL CYCLONIC CIRCULATION OVER THE FAR NW PORTION OF THE 
DISCUSSION AREA NEAR 25N140W WITH TROUGH S TO 17N140W. BROKEN TO 
OVERCAST MID/UPPER CLOUDS ARE ROTATING AROUND THE CIRCULATION N 
OF 14N  W OF 130W. A 70 KT JET S OF THE TROUGH AXIS. E OF THE 
CYCLONIC CIRCULATION AN UPPER LEVEL RIDGE EXTENDS FROM 30N126W 
TO 20N122W. A COL SEPARATES THE RIDGE FROM A LARGE ANTICYCLONIC 
CIRCULATION JUST N OF THE AREA OFF THE SOUTHERN CALIFORNIA 
COAST. MODERATE TO STRONG SUBSIDENCE WITH MODERATE TO STRONG 
SUBSIDENCE WITH DRY STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS 
BETWEEN THE RIDGE AXIS AND THE ANTICYCLONIC CIRCULATION. AN 
UPPER LEVEL TROUGH WITH AXIS FROM NE MEXICO TO THE TIP OF THE 
BAJA PENINSULA. A 75-90 JETSTREAM S OF THE TROUGH AXIS FROM 
21N114W INTO CENTRAL MEXICO. IN THE DEEP TROPICS AN UPPER LEVEL 
RIDGE EXTENDS FROM AN ANTICYCLONIC CIRCULATION OVER COLOMBIA NW 
INTO CENTRAL AMERICA. EXCEPT FOR A FEW SHOWERS ALONG THE ITCZ 
MODERATE TO STRONG SUBSIDENCE IS E OF 110W.

A SURFACE RIDGE COVERS THE AREA N OF 10N W OF 115W. BROKEN TO 
OVERCAST STRATOCUMULUS CLOUDS BLANKET THE AREA WITHIN THE RIDGE. 
ELY TRADES TO 20 KT AROUND THE SOUTHERN PERIPHERY OF THE 
RIDGE...FROM 5N TO 21N W OF 135W. OTHERWISE LARGE NW SWELLS 
ACROSS THE AREA W OF 115W.

$$
DGS