000
AXPZ20 KNHC 280331
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                      
0405 UTC SUN FEB 28 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
0315 UTC.               

...SPECIAL FEATURE...

GULF OF TEHUANTEPEC GALE WARNING...GALE FORCE N-NE WINDS
CONTINUE OVER THE GULF OF TEHUANTEPEC AND ARE EXPECTED TO
CONTINUE THROUGH SUNDAY AFTERNOON. SEAS ARE REACHING NEAR 14 FT
OVER THE GULF OF TEHUANTEPEC. THE N-NE SWELL FROM THE GAP WIND
EVENT IS MIXING WITH ENE SWELL FROM A GAP WIND EVENT OVER THE
GULFS OF FONSECA AND PAPAGAYO...LONG PERIOD CROSS EQUATORIAL SW
SWELL... AND WITH LONG PERIOD NW SWELL RESULTING IN SEAS 8 FT OR
GREATER ACROSS THE WATERS GENERALLY S OF 15N BETWEEN 90-110W.
THIS WILL CONTINUE THROUGH MON NIGHT WHEN THE SEAS WILL BEGIN TO
SUBSIDE.
     
...INTERTROPICAL CONVERGENCE ZONE...

THE ITCZ EXTENDS FROM 06N88W TO 00N120W TO 02N130W TO BEYOND
00N140W. ISOLATED MODERATE CONVECTION IS FROM 00N TO 04N BETWEEN
120W AND 135W. 

...DISCUSSION...

HIGH PRESSURE OF 1024 MB CENTERED NEAR 30N132W EXTENDS A RIDGE
SE TO NEAR 20N110W...AND SW TO 26N140W. THE PRESSURE GRADIENT
BETWEEN THE AREA OF HIGH PRESSURE AND LOWER PRESSURE IN THE
VICINITY OF THE ITCZ IS SUPPORTING MODERATE TO LOCALLY FRESH
TRADEWINDS. A LARGE AREA OF SEAS GREATER THAN 8 FT COVER THE
WATERS GENERALLY W OF 110W IN LONG PERIOD NW SWELL. THIS AREA OF
SEAS GREATER THAN 8 FT WILL CONTINUE THROUGH EARLY NEXT WEEK
BEFORE STARTING TO SUBSIDE. 

GAP WINDS...

IN ADDITION TO THE GALE FORCE GAP WIND EVENT OVER THE GULF OF
TEHUANTEPEC...STRONG HIGH PRESSURE N OF THE AREA HAS HELPED TO
GENERATE A GULF OF PAPAGAYO GAP WIND EVENT WITH STRONG TO NEAR
GALE WINDS EXPECTED OVER THE AREA THROUGH EARLY MONDAY BEFORE
STARTING TO DIMINISH. THIS EVENT IS COVERING A LARGE ENOUGH AREA
WHERE THE GULF OF FONSECA IS ALSO AFFECTED BY WINDS 25 KT OR
GREATER. SEAS ASSOCIATED TO THIS GAP WIND EVENT HAVE BUILT TO
NEAR 11 FT. THE NE SWELLS GENERATED FROM THIS EVENT CONTINUE TO
PROPAGATE WESTWARD FROM THE REGION AND MIX WITH THE NE SWELLS
GENERATED FROM THE GULF OF TEHUANTEPEC GAP WIND EVENT.
WINDS ARE 20 TO 25 KT OVER AND DOWNWIND OF THE GULF OF PANAMA
THIS EVENING WITH SEAS BUILDING TO NEAR 9 FT. WINDS WILL
DIMINISH TO 20 KT OR LESS BY MON WITH SEAS LESS THAN 8 FT. 

$$
FORMOSA