000
AXPZ20 KNHC 281513
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                      
1605 UTC SAT 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1500 UTC.               

...SPECIAL FEATURE...

GULF OF TEHUANTEPEC GALE WARNING...GALE FORCE N-NE WINDS
CONTINUE OVER THE GULF OF TEHUANTEPEC THIS MORNING. THE AREA OF
HIGH PRESSURE N OF THE AREA HAS SHIFTED EASTWARD AND WINDS HAVE
VEERED OVER THE SW GULF OF MEXICO THIS HAS RESULTED IN WINDS
DECREASING OVER THE GULF OF TEHUANTEPEC. WINDS WILL DROP BELOW
GALE FORCE BY THIS AFTERNOON. WINDS WILL CONTINUE TO DIMINISH
AND ARE EXPECTED TO REACH 20 KT OR LESS BY MON MORNING. SWELL
GENERATED FROM THIS GALE FORCE GAP WIND EVENT CONTINUES TO
PROPAGATE DOWNSTREAM OF THE GULF OF TEHUANTEPEC. THIS SWELL IS
MERGING WITH NE SWELL GENERATED FROM THE GULF OF PAPAGAYO GAP
WIND EVENT AS WELL AS WITH LONG PERIOD NW AND SW SWELL RESULTING
IN COMBINED SEAS GREATER THAN 8 FT COVERING MUCH OF THE WATERS
SOUTH OF 15N BETWEEN 90W AND 110W. THE SEAS WILL START TO
SUBSIDE MONDAY NIGHT. 
     
...INTERTROPICAL CONVERGENCE ZONE...

THE ITCZ EXTENDS FROM 05N87W TO 03N100W TO 03N125W TO 01S140W.
SCATTERED MODERATE ISOLATED STRONG CONVECTION WAS NOTED WITHIN
60 NM N OF THE ITCZ BETWEEN 92W AND 96W.

...DISCUSSION...

HIGH PRESSURE OF 1025 MB CENTERED N OF THE AREA NEAR 31N129W
EXTENDS A RIDGE SE TO NEAR 18N110W AND SW TO BEYOND 18N140W. THE
PRESSURE GRADIENT BETWEEN THIS AREA OF HIGH PRESSURE AND LOWER
PRESSURE IN THE VICINITY OF THE ITCZ IS MAINTAINING MODERATE TO
FRESH TRADEWINDS OVER THE WESTERN WATERS N OF THE ITCZ. LONG
PERIOD NW SWELL...MIXING WITH SOUTHERLY SWELL IS DOMINATING THE
WATERS W OF 105W WITH SEAS GREATER THAN 8 FT COVERING THIS
AREA.SEAS WILL SLOWLY SUBSIDE OVER THE NEXT COUPLE OF DAYS AND
COVERAGE OF THE 8 FT SEAS WILL DECREASE SLIGHTLY BY TUE MORNING.
A NEW SET OF NW SWELLS WILL REACH THE FAR NW WATERS MON NIGHT.

GAP WINDS...

STRONG TO NEAR GALE WINDS CONTINUE ACROSS THE GULFS OF PAPAGAYO
AND FONSECA THIS MORNING. THE AREA OF HIGH PRESSURE N OF THE
AREA THAT IS HELPING PRODUCE THE TIGHT PRESSURE GRADIENT WILL
WEAKEN OVER THE NEXT COUPLE OF DAYS. THIS WILL DIMINISH WINDS
FUNNELING INTO THE GULFS OF PAPAGAYO AND FONSECA. WINDS ARE
EXPECTED TO DIMINISH TO 20 KT OR LESS OVER THE GULF OF FONSECA
BY MONDAY. FRESH TO STRONG WINDS ARE EXPECTED TO CONTINUE OVER
THE GULF OF PAPAGAYO THROUGH TUE MORNING BEFORE DIMINISHING TO
20 KT OR LESS BY TUE AFTERNOON. SWELL GENERATED FROM THE GAP
WIND EVENT WILL MERGE WITH THE SWELL GENERATED BY THE GULF OF
TEHUANTEPEC AS WELL AS LONG PERIOD SW AND NW SWELL. STRONG TO
NEAR GALE WINDS PREVAIL OVER THE GULF OF PANAMA THIS MORNING.
WINDS WILL DIMINISH OVER THE NEXT DAY AND ARE EXPECTED TO
DIMINISH TO 20 KT OR LESS WITH SEAS LESS THAN 8 FT BY MON
AFTERNOON. 

$$
AL