000
AXPZ20 KNHC 011502
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC FRI APR 01 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 3N90W 5N125W 4N140W. SCATTERED MODERATE ISOLATED 
STRONG CONVECTION WITHIN 60 NM EITHER SIDE OF AXIS FROM 
112W-121W AND WITHIN 120 NM N OF AXIS FROM 127W-137W.

...DISCUSSION...
UPPER LEVEL CYCLONIC CIRCULATION OVER THE FAR NW PORTION OF THE 
DISCUSSION AREA NEAR 27N136W WITH TROUGH S TO 19N140W. BROKEN TO 
OVERCAST MULTI-LAYERS CLOUDS ARE ROTATING AROUND THE CIRCULATION 
N OF 25N  W OF 130W. A FEW LIGHT SHOWERS ARE EMBEDDED WITHIN 
THIS AREA. A 70-90 KT JET IS S OF THE TROUGH AXIS. E OF THE 
CYCLONIC CIRCULATION AN UPPER LEVEL RIDGE EXTENDS FROM NW MEXICO 
ACROSS SOUTHERN BAJA CALIFORNIA TO 23N118W. MODERATE TO STRONG 
SUBSIDENCE WITH MODERATE TO STRONG SUBSIDENCE WITH DRY STABLE 
AIR AT THE MIDDLE AND UPPER LEVELS IS WITHIN THE UPPER RIDGE. 

AN UPPER LEVEL TROUGH EXTENDS FROM A CYCLONIC CIRCULATION OVER 
THE WEST COAST OF MEXICO NEAR 23N106W TO 19N110W. IN THE DEEP 
TROPICS AN UPPER LEVEL TROUGH EXTENDS FROM 15N105W TO 5N98W. 
MODERATE TO STRONG SUBSIDENCE N OF 5N BETWEEN 95W AND 110W.

A 1013 SURFACE HIGH IS CENTERED NEAR 23N129W...WITH RIDGE 
COVERING THE AREA N OF 15N W OF 115W. BROKEN TO OVERCAST 
STRATOCUMULUS CLOUDS BLANKET THE AREA WITHIN THE RIDGE. THE PRES 
GRADIENT HAS RELAXED AND THE TRADES HAVE DECREASED TO LESS THAN 
20 KT. HOWEVER LARGE NW SWELLS ACROSS THE AREA W OF 115W. TRADES 
ARE EXPECTED TO ONCE AGAIN INCREASE TO 20 KT ON SAT.

$$
DGS