000
AXPZ20 KNHC 161532
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1605 UTC TUE DEC 16 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.  
      
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

MONSOON TROUGH FROM 9N83W TO 1011 MB LOW PRES NEAR 6N90W TO 
4N95W. ITCZ FROM 4N95W TO 10N125W TO 7N140W. SCATTERED MODERATE 
ISOLATED STRONG CONVECTION FROM 10N-14N BETWEEN 112W-123W.

...DISCUSSION...

AN UPPER LEVEL TROUGH EXTENDS FROM 32N121W TO 23N125W TO 
20N140W. A 95-100 KT JETSTREAM AT THE BASE OF THE TROUGH IS FROM 
17N135W TO 20N120W TO CENTRAL BAJA CALIFORNIA. ANOTHER STRONG 
JETSTREAM WITH WINDS 95-125 KT EXTENDS FROM 32N129W TO 28N125W. 
STRONG SUBSIDENCE WITH DRY AND STABLE AIR AT THE MIDDLE AND 
UPPER LEVELS IS FROM 14N-25N W OF 125W. OTHERWISE A BROAD UPPER 
LEVEL RIDGE COVERS THE REMAINDER OF THE AREA.

A COLD FRONT EXTENDS FROM 32N119W TO 25N125W. SCATTERED SHOWERS 
ARE WITHIN 90 NM E OF THE FRONT. LARGE 8-13 FT SWELL ACROSS A 
LARGE PORTION OF THE AREA W OF A LINE FROM FROM CENTRAL BAJA 
CALIFORNIA COAST NEAR 19N115W TO THE EQUATOR AT 130W.

HIGH PRES IS FORECAST TO BUILD ACROSS SOUTHERN MEXICO AND 
TIGHTEN THE PRES GRADIENT...RESULTING IN NLY WINDS INCREASING TO 
20-25 KT THROUGH THE GULF OF TEHUANTEPEC TONIGHT. THE WINDS WILL 
DECREASE BY EARLY THU.

$$
DGS