000
AXPZ20 KNHC 141522
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SAT APR 14 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
ITCZ FROM 3N100W 4N130W 2N140W. SCATTERED MODERATE TO STRONG 
CONVECTION WITHIN 200 NM N OF AXIS FROM 108W-120W AND 60 NM 
EITHER SIDE OF AXIS FROM 121W-124W ABD WITHIN 90 NM EITHER SIDE 
OF AXIS FROM 131W-137W.

...DISCUSSION...
AN UPPER LEVEL RIDGE OVER THE FAR WESTERN PORTION OF THE 
DISCUSSION AREA WITH AXIS ALONG 140W. AN UPPER LEVEL TROUGH E OF 
THE RIDGE EXTENDS FROM A CYCLONIC CIRCULATION OVER SOUTHERN 
NEVADA ACROSS THE BAJA CALIFORNIA PENINSULA. A 120-135 KT 
JETSTREAM AROUND THE TROUGH FROM 32N118W TO 31N114W NE INTO NEW 
MEXICO. A LARGE AREA OF STRONG SUBSIDENCE WITH DRY STABLE AIR AT 
THE MIDDLE AND UPPER LEVELS IS ACROSS THE AREA FROM 12N TO 30N.
ANOTHER UPPER LEVEL RIDGE WITH AXIS FROM PANAMA NW TO 16N100W.

DISSIPATING COLD FRONT EXTENDS FROM 27N114W TO 24N122W. NW WINDS 
TO 20 KT W OF THE FRONT TO 120W. THE FRONT WILL DISSIPATE 
TONIGHT AND THE WINDS WILL DECREASE...HOWEVER LARGE NW SWELL TO 
13 FT WILL PERSIST. 

HIGH PRES RIDGE EXTENDS FROM 1028 MB HIGH PRES CENTERED NEAR 
31N138W TO 20N115W. AROUND THE SOUTHERN PERIPHERY OF THE RIDGE 
TRADES TO 20 KT ARE FROM 5N-20N W OF 120W. OTHERWISE SEAS ARE 
9-11 FT IN MIXED NE...NW AND SW SWELLS ARE S OF 20N W OF 115W.

$$
DGS