000
AXPZ20 KNHC 290912
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC THU MAR 29 2012

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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
ITCZ AXIS FROM 4N116W 3N125W 6N137W. SCATTERED MODERATE TO 
STRONG CONVECTION WITHIN 90 NM N OF AXIS FROM 119W-126W.

...DISCUSSION...
UPPER LEVEL TROUGH FROM 32N128W TO A CYCLONIC CIRCULATION W OF 
THE AREA NEAR 16N143W. AN UPPER LEVEL RIDGE EXTENDS FROM 25N135W 
TO 10N125W. UPPER LEVEL DIFFLUENT FLOW IS ENHANCING CONVECTIVE 
ACTIVITY FROM 8N-18N W OF 128W. AN UPPER LEVEL TROUGH IS ACROSS 
THE BAJA PENINSULA. NO WEATHER WITH THE TROUGH DUE TO DRY AIR AT 
THE MIDDLE AND UPPER LEVELS. OTHERWISE MOSTLY WLY UPPER LEVEL 
FLOW ACROSS THE AREA S OF 20N. A 75-95 KT JET FROM 24N131W TO 
10N110W OVER CENTRAL MEXICO. WITH THE EXCEPTION OF CONVECTION 
ALONG A SURFACE TROUGH MODERATE TO STRONG SUBSIDENCE WITH DRY 
STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS E OF 100W.

NW SURFACE WINDS TO 20 KT ARE WITHIN 120 NM OF THE COAST OF BAJA 
CALIFORNIA. OTHERWISE LARGE NW SWELLS TO 12 FT ARE N OF 20N W OF 
120W.

ELY TRADES FROM 5N-20N W OF 120W WILL PERSIST THROUGH FRI. 
LARGE NW SWELL ARE MERGING WITH SW SWELL FROM THE SOUTHERN 
HEMISPHERE.

PERSISTENT SURFACE TROUGH FROM COSTA RICA TO 5N95W. SCATTERED 
MODERATE TO STRONG CONVECTION IS WITHIN 90 NM S OF THE TROUGH 
AXIS FROM 89W-95W.

$$
DGS