000
AXPZ20 KNHC 140928
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1005 UTC SUN DEC 14 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 LOW PRES 1010 MB NEAR 09N85W TO 
07N95W TO 07N103W...WHERE IT TRANSITIONS TO AN ITCZ EXTENDING 
WESTWARD TO BEYOND 07N140W. SCATTERED MODERATE CONVECTION IS 
OBSERVED WITHIN 60 NM N OF THE ITCZ BETWEEN 110W AND 115W...AND 
WITHIN 30 NM EITHER SIDE OF THE ITCZ W OF 135W.

...DISCUSSION...

A COLD FRONT ORIGINATING OVER THE N CENTRAL PACIFIC IS MOVING 
INTO THE DISCUSSION AREA...CURRENTLY REACHING FROM 32N125W TO 
25N147W. SCATTEROMETER SATELLITE DATA FROM SEVERAL HOURS AGO 
INDICATED NW WINDS OF 20 TO 25 KT BEHIND THE FRONT WITH FRESH SE 
FLOW AHEAD OF IT N OF 28N. ALTIMETER SATELLITE DATA ALSO 
INDICATED 10 TO 15 FT SEAS...LIKELY IN NW SWELL BEHIND THE 
FRONT. THE FRONT WILL SWEEP EASTWARD AND REACH FROM SOUTHERN 
CALIFORNIA TO 30N120W TO 24N125W BY 48 HOURS FOLLOWED BY THE NW 
SWELL. 

EAST OF THE COLD FRONT 1022 MB HIGH PRES IS BUILDING BEHIND A 
DYING STATIONARY FRONT REACHING FROM THE CENTRAL GULF OF 
CALIFORNIA ACROSS BAJA CALIFORNIA SUR THEN WSW TO 18N140W. A 
SCATTEROMETER SATELLITE PASS FROM 04 UTC INDICATED 15 TO 20 KT 
NORTHERLY WINDS ALONG THE COAST OF BAJA CALIFORNIA NORTE. 
GENERALLY LIGHT TO MODERATE WINDS PERSIST IN THE AREA OF THE 
HIGH PRES N OF 20N E OF 130W. THE HIGH PRES IS MAINTAIN MODERATE 
TRADE WINDS S OF 20N AS WELL.

A PAIR OF WEAK TROUGHS ARE NOTED ALONG THE ITCZ BETWEEN 110W AND 
118W. A SMALL AREA OF SHOWERS IS NOTED IN ASSOCIATION WITH THESE 
FEATURES. 

GULF OF TEHUANTEPEC...FRESH TO STRONG GAP WINDS PERSIST THIS 
MORNING THROUGH THE GULF OF TEHUANTEPEC...MAINLY DUE TO LOCAL 
DRAINAGE EFFECTS. THESE WINDS WILL DIMINISH LATER THIS MORNING 
AFTER THE DRAINAGE EFFECTS ABATE...THEN DIMINISH FURTHER THROUGH 
THE NEXT COUPLE OF DAYS AS THE REGIONAL PRESSURE GRADIENT 
RELAXES.

GULF OF PAPAGAYO...FRESH TO STRONG NE GAP WINDS HAVE DIMINISHED 
AND WILL LIKELY ONLY PULSE TO FRESH LEVELS THROUGH SUNDAY. 

$$
CHRISTENSEN