000
AXPZ20 KNHC 151535
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1605 UTC WED APR 15 2015

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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC. 
 
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...              

THE PRIMARY ITCZ AXIS EXTENDS FROM 03N103W TO 04N125W TO 
05N140W. SCATTERED MODERATE CONVECTION IS WITHIN 180 NM N OF  
THE AXIS W OF 136W. THE SECONDARY ITCZ AXIS EXTENDS FROM 
03.4S89W TO 01S98W. SCATTERED MODERATE CONVECTION WITHIN 75    
NM S OF THE AXIS W OF 101W.

ALSO...SCATTERED MODERATE CONVECTION IS WITHIN 180 NM SW OF THE 
COAST OF PANAMA W OF 81W.

...DISCUSSION... 

A HIGH PRESSURE CENTER OF 1036 MB LOCATED NEAR 39N134W EXTENDS  
A RIDGE AXIS TO THE SE THROUGH 32N130W TO 21N114W. A TIGHT 
PRESSURE GRADIENT IS IN PLACE ALONG THE CENTRAL AND SOUTHERN 
CALIFORNIA COASTS WHERE GALE WARNINGS ARE CURRENTLY IN PLACE. 
THESE WINDS ARE GENERATING FRESH NORTHERLY SWELL WHICH IS 
MANAGING TO PROPAGATE SOUTHWARD INTO THE DISCUSSION WATERS N   
OF 25N W OF 116W...WITH A SMALL AREA OF FRESH TO STRONG WINDS 
ALSO SNEAKING INTO THE AREA N OF 29N BETWEEN 119W AND 126W. 
WINDS WILL DIMINISH THROUGH THE DAY AND TONIGHT WITH RESIDUAL 
NORTHERLY SWELL SLOWLY DECAYING THROUGH THE END OF THE WEEK.

FRESH TRADE WINDS ARE OCCURRING SW OF THE RIDGE AXIS SUPPORTING 
AN AREA OF 8-10 FT COMBINED SEAS ACROSS THE W CENTRAL WATERS. 
THE RIDGE AND SUPPORTING HIGH CENTER WILL SLOWLY WEAKEN AND 
SHIFT TO THE SW THROUGH THE END OF THE WEEK ALLOWING FOR TRADES 
TO DIMINISH WITH ASSOCIATED SEAS SUBSIDING THIS UPCOMING 
WEEKEND. 

GULF OF CALIFORNIA...A COLD FRONT HAS MOVED JUST S OF THE 
CALIFORNIA/MEXICO BORDER WITH A PRE-FRONTAL TROUGH HAVING MOVED 
INTO THE FAR NORTHERN GULF. FRESH TO STRONG NORTHERLY WINDS HAVE 
ARRIVED N OF 30.5N W OF 114W WHICH WILL SPREAD TO THE AREA N OF 
30N BY THE AFTERNOON BEFORE DIMINISHING TO 20 KT OR LESS BY THE 
EVENING. SEAS MAY BRIEFLY BUILD TO 8 FT THIS AFTERNOON.

E OF 110W...NO SIGNIFICANT GAP WIND EVENTS ARE ANTICIPATED FOR 
THE NEXT 48 HOURS. WINDS WILL MANAGE TO PULSE TO 20 KT IN THE 
GULF OF PAPAGAYO DURING THE LATE NIGHT AND EARLY MORNING   
HOURS. OTHERWISE LIGHT AND VARIABLE WINDS AND SEAS LESS THAN    
8 FT WILL PREVAIL.

$$
LEWITSKY