000 AXPZ20 KNHC 110334 TWDEP TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 0405 UTC THU DEC 11 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 0215 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... MONSOON TROUGH EXTENDS FROM 07N78W TO 09N85W TO 05N100W TO 05N110W. ITCZ CONTINUES FROM 05N110W TO 08N120W TO 1009 MB LOW PRES NEAR 08N131W TO BEYOND 07N140W. NO SIGNIFICANT CONVECTION. ...DISCUSSION... A STRONG COLD FRONT HAS REACHED THE FAR NW PART OF THE FORECAST REGION AND NOW EXTENDS FROM 30N136W TO 28N140W. FRESH TO STRONG SW WINDS ARE NOTED PER SCATTEROMETER DATA AHEAD OF THE FRONT COVERING MAINLY THE WATERS W OF A LINE FROM 30N130W TO 27N140W. THE FRONT IS FORECAST TO MOVE ACROSS THE NW PART OF THE AREA TONIGHT AND THU AND WILL EXTEND FROM 30N125W TO 21N140W BY THU EVENING. FRESH TO STRONG WINDS AND BUILDING SEAS IN THE 15-20 FT RANGE IN NW SWELL ARE EXPECTED IN THE WAKE OF THE FRONT. IT WILL RETAIN CONSIDERABLE ENERGY THROUGH FRI AS IT REACHES THE COAST OF NORTHERN BAJA CALIFORNIA. THE FRONT IS FORECAST TO DISSIPATE ACROSS THE FORECAST WATERS FRI NIGHT INTO SAT. ANOTHER STRONG COLD FRONT WILL APPROACH THE FAR NW PART OF THE DISCUSSION AREA LATE SAT AND EARLY SUN. THE PRESSURE GRADIENT BETWEEN THE ITCZ AND WEAKENING 1020 MB HIGH PRES CENTERED NEAR 25N129W IS SUPPORTING FRESH TRADES ACROSS WESTERN WATERS NORTH OF THE CONVERGENCE ZONE... PARTICULARLY FROM 07N-11N W OF 135W. THE HIGH WILL DISSIPATE TONIGHT AS THE COLD FRONT SWEEPS ACROSS THE NORTHERN WATERS... ALLOWING TRADE WINDS NORTH OF THE ITCZ TO DIMINISH AND WIND WAVES S OF 15N TO SUBSIDE. A 1009 MB LOW PRES IS WITHIN THE ITCZ NEAR 08N131W. SATELLITE IMAGERY SHOWS A SWIRL OF LOW CLOUDS IN ASSOCIATION WITH THIS SYSTEM. A RECENT SCATTEROMETER PASS INDICATES A TROUGH EXTENDING FROM 11N129W TO THE LOW CENTER TO 07N132W. THE LOW WILL MOVE WESTWARD OVER THE NEXT 24 HOURS. GULF OF TEHUANTEPEC...THE 2224 UTC RAPIDSCAT SHOWED NORTHERLY WINDS OF 20-25 KT ACROSS THIS AREA. FRESH TO STRONG NE WINDS WILL CONTINUE THROUGH THE REMAINDER OF THE WEEK MAINLY DURING THE OVERNIGHT AND EARLY MORNING HOURS WITH THE ASSISTANCE OF THE NOCTURNAL DRAINAGE FLOW. WAVE MODEL GUIDANCE INDICATES SEAS OF 9- 11 FT...SUBSIDING TO 8-9 FT ON THU. A LARGE AREA OF SEAS 8 FT OR GREATER WILL PROPAGATE AWAY FROM THE GULF TONIGHT AND THU AFFECTING THE WATERS FROM 06N TO 11N BETWEEN 96W AND 110W BY THU EVENING. GULF OF PAPAGAYO...FRESH TO STRONG NE GAP WINDS WILL CONTINUE TO PULSE THE NEXT FEW DAYS...PEAKING IN THE EARLY MORNING DURING MAX NOCTURNAL DRAINAGE FLOW. SEAS WILL BUILD TO 9 FT DOWNSTREAM OF THE SOURCE REGION. $$ GR