000
AXPZ20 KNHC 150241
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
0405 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0300 UTC. 
 
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...              

ITCZ EXTENDS FROM 03N94W TO 04N110W TO 03N120W TO 05N133W TO 
04N140W. SCATTERED MODERATE CONVECTION IS WITHIN 90 NM EITHER 
SIDE OF AXIS BETWEEN 102W AND 108W. 

ALSO....SCATTERED MODERATE TO STRONG CONVECTION IS FROM 03N TO 
08N BETWEEN 82W AND 90W...AND SCATTERED MODERATE CONVECTION IS  
FROM 09N TO 11N BETWEEN 120W AND 124W.

...DISCUSSION... 

A HIGH PRESSURE CENTER OF 1037 MB LOCATED NEAR 38N135W EXTENDS  
A RIDGE AXIS TO THE SE TO 20N110W. A TIGHT PRESSURE GRADIENT IS 
IN PLACE ALONG THE CENTRAL AND NORTHERN CALIFORNIA COASTS WHERE 
GALE WARNINGS ARE CURRENTLY IN PLACE. THESE WINDS ARE GENERATING 
FRESH NORTHERLY SWELL WHICH IS PROPAGATING SOUTHWARD INTO THE 
DISCUSSION WATERS N OF 25N BETWEEN 117W AND 128W. THESE SWELLS 
WILL CONTINUE TO PROPAGATE TO THE S THROUGH 48 HOURS WITH FRESH 
TO STRONG NORTHERLY WINDS ADVECTING INTO THE AREA THIS EVENING 
AND PERSISTING THROUGH LATE WED NIGHT.

FRESH TRADE WINDS ARE OCCURRING SW OF THE RIDGE AXIS SUPPORTING 
AN AREA OF 8-9 FT COMBINED SEAS FROM 21N TO 25N BETWEEN 127W AND 
134W. THESE TRADES WILL BRIEFLY INCREASE TO STRONG LEVELS 
TONIGHT AS THE HIGH AND RIDGE SINK SLIGHTLY TO THE SE-S. THE 
TRADES WILL THEN DIMINISH BACK TO FRESH LEVELS WED AND WED NIGHT 
WHILE ASSOCIATED SEAS OF 8-10 FT LINGER INTO THU MORNING.

GULF OF CALIFORNIA...A COLD FRONT IS FORECAST TO SWEEP ACROSS 
THE SOUTHWESTERN UNITED STATES TONIGHT THROUGH WED. FRESH TO 
STRONG NORTHERLY WINDS WILL ARRIVE BEHIND THE FRONT OR REMNANT 
TROUGH IN THE NORTHERN GULF COMMENCING WED MORNING AND SLOWLY 
SPREADING SOUTHWARD TO 28N BY THU MORNING.

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 LATE TONIGHT AND EARLY MORNING HOURS. 
OTHERWISE LIGHT AND VARIABLE WINDS AND SEAS LESS THAN 8 FT WILL 
PREVAIL.

$$
FORMOSA