000
AXPZ20 KNHC 261510
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                      
1605 UTC THU FEB 26 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 AND
ARE EXPECTED TO PERSIST THROUGH SUN MORNING. SEAS WILL CONTINUE
TO BUILD AND PEAK NEAR 19 FT EARLY SAT MORNING THROUGH
AFTERNOON. THE SWELL GENERATED FROM THIS GAP WINDS EVENT WILL
MIX WITH ENE SWELL DOWNSTREAM OF THE GULFS OF FONSECA AND
PAPAGAYO...LONG PERIOD SW SWELL...AS WELL AS LONG PERIOD NW
SWELL. THIS WILL RESULT IN SEAS 8 FT OR GREATER ACROSS THE
WATERS GENERALLY S OF 15N BETWEEN 90W AND 105W THROUGH THE
WEEKEND BEFORE BEGINNING TO SUBSIDE EARLY NEXT WEEK.
     
...INTERTROPICAL CONVERGENCE ZONE...

THE ITCZ EXTENDS FROM 04N86W TO 04N88W TO 03N110W TO 02N130W TO
02N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION WAS NOTED
WITHIN 120 NM S OF THE ITCZ BETWEEN 104W AND 118W. SCATTERED
MODERATE CONVECTION WAS NOTED WITHIN 120 NM N OF THE ITCZ W OF
135W. 

...DISCUSSION...

WEAK HIGH PRESSURE OF 1022 MB CENTERED OVER THE NORTHERN WATERS
NEAR 29N128W EXTENDS A RIDGE SE TO NEAR 20N110W WHILE A
DISSIPATING COLD FRONT EXTENDS OVER THE FAR NW WATERS. 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. THE COLD FRONT HAS HELPED USHER IN A
FRESH SET OF NW SWELLS OVER THE NW WATERS WITH SEAS IN THE 12-19
FT COVERING THE WATERS NW OF LINE FROM 30N132W TO 20N140W. A
LARGE AREA OF SEAS GREATER THAN 8 FT COVER THE WATERS GENERALLY
W OF 100W. THIS AREA OF SEAS GREATER THAN 8 FT WILL CONTINUE
THROUGH THE WEEKEND. 

GAP WINDS...

IN ADDITION TO THE STRONG 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 MUCH OF THE WEEKEND.
THIS EVENT IS COVERING A LARGE ENOUGH AREA WHERE THE GULF OF
FONSECA IS ALSO AFFECTED BY WINDS 25 KT OR GREATER. THESE STRONG
TO NEAR GALE WINDS WILL CONTINUE THROUGH THE WEEKEND WITH SEAS
BUILDING TO NEAR 11 FT. THE NE SWELLS GENERATED FROM THIS EVENT
WILL PROPAGATE WESTWARD FROM THE REGION AND MIX WITH THE NE
SWELLS GENERATED FROM THE GULF OF TEHUANTEPEC GAP WIND EVENT.
WINDS WILL INCREASE TO 20 KT OVER AND DOWNWIND OF THE GULF OF
PANAMA THIS EVENING WITH SEAS BUILDING TO NEAR 8 FT BY SAT
MORNING. 
 
$$
AL