000
AXPZ20 KNHC 280246
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC MON APR 28 2014

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 
0245 UTC. 
  
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS FROM 08N77W TO 10N88W TO 06N95W TO 
05N104W. THE ITCZ AXIS EXTENDS FROM 05N104W TO 07N127W TO 
04N135W TO BEYOND 04N140W. SCATTERED MODERATE CONVECTION IS FROM 
04N TO 08N BETWEEN 92W AND 102W. SCATTERED MODERATE TO STRONG 
CONVECTION IS FROM 07N TO 12N BETWEEN 110W AND 130W. 

...DISCUSSION...     

ALOFT...AN UPPER LEVEL HIGH IS CENTERED OVER THE NW CORNER AT 
29N133W WITH STRONG SUBSIDENCE. AN UPPER LEVEL LOW IS FURTHER SE 
AT 20N131W ALSO WITH STRONG SUBSIDENCE. A TROUGH AXIS EXTENDS S 
FROM THE LOW TO THE TROPICS AT 08N130W. ZONAL FLOW IS N OF 20 E 
OF 120W TO INCLUDE BAJA CALIFORNIA AND N MEXICO WITH STRONG 
SUBSIDENCE. A BROAD UPPER LEVEL RIDGE IS OVER THE TROPICS S OF 
20N AND E OF 120W WITH EMBEDDED UPPER LEVEL HIGHS AT 12N105W AND 
12N95W. AN AREA OF UPPER LEVEL DIFFLUENCE IS OVER THE TROPICS 
FROM 05N TO 10N BETWEEN 110W AND 120W ENHANCING THE CONVECTION 
OVER THE ITCZ. 

AT THE SURFACE...A 1026 MB HIGH IS NEAR 31N133W EXTENDING A 
RIDGE AXIS SE TO 18N110W. A TIGHT PRESSURE GRADIENT AND 
DISSIPATING COLD FRONT IS SUPPORTING A GALE OFF THE COAST OF SAN 
DIEGO CALIFORNIA. FRESH TO STRONG NW WINDS W OF THE BAJA 
CALIFORNIA PENINSULA N OF 25N ARE PRODUCING 8-10 FT SEAS. THESE 
WINDS WILL PERSIST THROUGH THE NEXT 12 HOURS. EXPECT 20 TO 25 KT 
WINDS TO ADVECT OVER TO THE NORTHERN GULF OF CALIFORNIA TUE WITH 
SEAS BUILDING TO 8 FT BY TUE EVENING. 

THE PRESSURE GRADIENT BETWEEN THE RIDGE AND THE ITCZ TO THE S 
CONTINUES TO SUPPORT FRESH TO STRONG TRADES ROUGHLY FROM 10N TO 
14N W OF 123W. THESE TRADES WILL PERSIST THROUGH 24 HOURS THEN 
WILL DIMINISH AS THE PRESSURE GRADIENT WEAKENS SLIGHTLY. 

NW SWELL CONTINUES TO MERGE WITH CROSS-EQUATORIAL SOUTHERLY SWELL 
WITH COMBINED SEAS OF 8-10 FT COVERING THE MAJORITY OF THE 
WATERS N OF 07N AND W OF 110W. THIS SWELL WILL CONTINUE TO MERGE 
THROUGH THE NEXT 24 HOURS...WITH THE SOUTHERLY COMPONENT 
DECAYING THEREAFTER AND WITH A NEW SET OF REINFORCING NW SWELL 
ARRIVING BY 48 HOURS AS SEAS OF 8-11 FT COVERS THE AREA N OF A 
LINE FROM 19N112W TO 20N132W TO 30N140W. 

MORE PURELY CROSS-EQUATORIAL S-SW SWELL IS SPILLING NORTHWARD OF 
THE EQUATOR TO 02N SW-W OF THE GALAPAGOS ISLANDS. THIS SWELL 
WILL CONTINUE AT 8-10 FT THROUGH THE NEXT 48 HOURS ACROSS THE 
SAME GENERAL AREA.

OTHERWISE...EXPECT FAIRLY TRANQUIL WIND CONDITIONS ACROSS THE 
GULFS OF TEHUANTEPEC...PAPAGAYO...AND PANAMA THROUGH THE NEXT 
FEW DAYS...AS LIGHT TO MODERATE WINDS PREVAIL E OF 110W.

$$ 
FORMOSA