000
AXPZ20 KNHC 210311
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC WED MAR 21 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 ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0215 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

ITCZ AXIS FROM 00N120W TO 00N130W. NO SIGNIFICANT CONVECTION.

...DISCUSSION...
UPPER LEVEL ANTICYCLONIC CIRCULATION IS CENTERED NEAR 31N126W. A 
WEAK UPPER LEVEL TROUGH IS SW OF THE ANTICYCLONE ENTERING THE 
DISCUSSION AREA NEAR 31N139W TO 26N135W. WITH THE EXCEPTION OF A 
FEW LOW LEVEL SHOWERS ALONG 9N FROM 115W-125W STRONG SUBSIDENCE 
WITH DRY STABLE AIR AT THE MID AND UPPER LEVELS ARE ACROSS THE 
AREA W OF 115W AND FROM 10N-20N BETWEEN 100W-115W.

AN UPPER LEVEL TROUGH EXTENDS FROM A CYCLONIC CIRCULATION OVER W 
TEXAS ACROSS MEXICO TO 20N104W. MOSTLY ZONAL WLY FLOW IS S OF 
20N. 

NW WINDS OF 20 TO 25 KT IS IN THE GULF OF CALIFORNIA N OF 22N 
HIGH PRES RIDGE EXTENDS FROM A 1025 MB HIGH PRES CENTER LOCATED 
JUST N OF THE DISCUSSION AREA NEAR 32N133W WITH RIDGE FROM THE 
HIGH TO 17N111W. ELY TRADES IN THE 20 KT RANGE ARE ALONG THE 
SOUTHERN PERIPHERY OF THE RIDGE FROM 7N-20N W OF 130W. LARGE 
8-10 FT NW SWELLS ACROSS THE AREA W OF 110W.

SURFACE TROUGH EXTENDS FROM THE COAST OF COSTA RICA NEAR 10N85W 
TO 3N99W. SCATTERED SHOWERS ARE WITHIN 300 NM SE OF THE TROUGH 
E OF 93W. 

$$
PAW