000
AXPZ20 KNHC 110934
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1005 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.  
       
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
           
THE MONSOON TROUGH EXTENDS FROM 08N78W TO 08N86W TO 06N100W. THE 
ITCZ EXTENDS FROM 06N100W TO 06N118W TO 1011 MB LOW PRES NEAR 
08N132W TO 07N140W. SCATTERED MODERATE CONVECTION IS FROM 05N TO 
13N BETWEEN 106W AND 111W.

...DISCUSSION...

A STRONG COLD FRONT EXTENDS FROM 32N131W TO 26N140W. FRESH TO 
STRONG SW WINDS ARE NOTED ON RECENT SCATTEROMETER DATA EAST OF 
THE FRONT COVERING MAINLY THE WATERS W OF A LINE FROM 30N127W TO 
25N140W. THE FRONT IS FORECAST TO MOVE ACROSS THE NW PART OF THE 
AREA THROUGH THU AFTERNOON AND BY FRI NIGHT LATE EXTEND FROM 
30N122W TO 24N130W TO 20N140W. FRESH TO STRONG WINDS AND 
BUILDING SEAS IN THE 13-19 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 INTO EARLY SUN. 

THE PRESSURE GRADIENT BETWEEN THE ITCZ AND WEAKENING 1018 MB 
HIGH PRES CENTERED NEAR 27N125W IS SUPPORTING FRESH TRADES 
ACROSS THE WEST-CENTRAL WATERS NORTH OF THE CONVERGENCE ZONE... 
PARTICULARLY FROM 08N-15N W OF 130W. THE HIGH WILL SLIDE E-SE 
AND DISSIPATE BY LATE THU 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.

GULF OF TEHUANTEPEC...EARLIER RAPIDSCAT DATA SHOWED NORTHERLY 
WINDS OF 20-25 KT ACROSS THE TEHUANTEPEC REGION. 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 8-11 FT THROUGH THU AFTERNOON...SUBSIDING TO 8-10 FT BY 
FRI INTO SAT. A LARGE AREA OF SEAS 8 FT OR GREATER WILL 
PROPAGATE AWAY FROM THE GULF REGION THROUGH THU AFFECTING THE 
WATERS GENERALLY FROM 06N TO 13N BETWEEN 97W AND 110W. 

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 8 FT DOWNSTREAM 
OF THE SOURCE REGION.
   
$$
HUFFMAN