000
AXPZ20 KNHC 272123
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SUN APR 27 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC. 
  
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS FROM 09N83W TO 08N91W. THE ITCZ AXIS 
EXTENDS FROM 08N91W TO 05N100W TO 05N120W TO O6N130W TO BEYOND 
04N140W. SCATTERED MODERATE CONVECTION IS FROM 03N TO 06N 
BETWEEN 85W AND 92W...FROM 05N TO 08N BETWEEN 97W AND 102W...AND 
FROM 04N TO 07N BETWEEN 106W AND 109W. SCATTERED MODERATE TO 
ISOLATED STRONG CONVECTION IS FROM 03N TO 11N BETWEEN 112W AND 
132W. 

...DISCUSSION...     

ALOFT...AN UPPER LEVEL HIGH IS CENTERED OVER THE NW CORNER AT 
29N134W WITH STRONG SUBSIDENCE. AN UPPER LEVEL LOW IS FURTHER SE 
AT 22N130W 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 
13N96W. 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 32N136W EXTENDING A 
RIDGE AXIS SE TO 18N110W. A TIGHT PRESSURE GRADIENT IS 
SUPPORTING FRESH TO STRONG NW WINDS OFF THE SOUTHERN CALIFORNIA 
COAST SOUTHWARD TO W OF THE BAJA CALIFORNIA PENINSULA (EXCEPT TO 
GALE FORCE NEAR POINT CONCEPTION) ALONG WITH 8-11 FT SEAS. THESE 
WINDS WILL PERSIST THROUGH THE NEXT 24 HOURS.

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