000
AXPZ20 KNHC 260304
TWDEP 

TROPICAL WEATHER DISCUSSION                                                                                                            
NWS NATIONAL HURRICANE CENTER MIAMI FL                           
0405 UTC WED FEB 26 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 
0300 UTC.                           

...SPECIAL FEATURE...

A STRONG COLD FRONT WILL MOVE INTO THE FORECAST AREA BY THU 
MORNING EXTENDING FROM 30N137W TO 25N140W WITH WINDS TO GALE 
FORCE WITHIN 90 NM E OF THE FRONT. THE FRONT WILL RAPIDLY SHIFT 
EASTWARD WITH GALE FORCE WINDS CONTINUING EAST AND WEST OF THE 
FRONT THROUGH AT LEAST THU EVENING. THE FRONT WILL USHER IN A 
NEW SET OF NW SWELLS...WITH SEAS REACHING NEAR 14 FT OVER THE 
FAR NW PORTION OF THE FORECAST AREA THU MORNING AND BUILDING TO 
NEAR 19 FT BY THU EVENING. 

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...              

THE ITCZ EXTENDS FROM 05N90W TO 06N120W. IT THEN RESUMES FROM 
07N125W TO 06N140W. NO SIGNIFICANT CONVECTION WAS NOTED. 

...DISCUSSION...

WEAK HIGH PRESSURE OF 1020 MB IS CENTERED OVER THE FORECAST AREA 
NEAR 25N118W. A COLD FRONT IS MOVING THROUGH THE NW PART OF THE 
FORECAST AREA EXTENDING FROM 30N133W TO 24.5N140W. AN UPPER 
LEVEL LOW HAS INDUCED A SURFACE TROUGH FROM 10N120W TO 04N123W. 
SCATTERED MODERATE TO ISOLATED STRONG CONVECTION ASSOCIATED WITH 
THE TROUGH WAS NOTED WITHIN 300 NM E OF THE TROUGH FROM 05N TO 
10N. MODERATE TO FRESH WINDS PREVAIL WITHIN 210 NM ON EITHER 
SIDE OF THE TROUGH FROM 05N TO 10N. OTHERWISE THE PRESSURE 
GRADIENT BETWEEN THE WEAK HIGH PRESSURE AND THE ITCZ IS ONLY 
ABLE TO SUPPORT GENTLE TO MODERATE TRADES OVER MUCH OF THE 
FORECAST AREA. THE SURFACE TROUGH WILL DISSIPATE OVER THE NEXT 
24 HOURS WITH WINDS ASSOCIATED WITH THE TROUGH DIMINISHING TO 
MAINLY MODERATE. THE COLD FRONT HAS USHERED IN A SET OF NW 
SWELLS OVER THE FORECAST AREA WITH SEAS IN TO 8 TO 16 FT RANGE 
COVERING THE WATERS NW OF LINE FROM 30N129W TO 21N140W. THE 
SWELLS WILL CONTINUE TO PROPAGATE SE OVER THE NEXT COUPLE OF 
DAYS WHILE SLOWLY SUBSIDING. THE COLD FRONT WILL SLOW ITS 
EASTWARD PROGRESS AND GRADUALLY DISSIPATE OVER THE NEXT COUPLE 
OF DAYS BEFORE A STRONGER COLD FRONT ENTERS THE AREA...DISCUSSED 
IN THE SPECIAL FEATURES SECTION. 

GAP WINDS...

WINDS WILL PULSE TO FRESH TO STRONG OVER THE GULF OF PAPAGAYO 
OVERNIGHT. WINDS WILL DIMINISH TO 20 KT OR LESS BY WED 
AFTERNOON. 

$$
AL