000
AXPZ20 KNHC 282125
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS NATIONAL HURRICANE CENTER MIAMI FL 
2205 UTC SAT DEC 28 2013

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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.
 
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...           
MONSOON TROUGH EXTENDS FROM 05N77W TO 03N81W. ITCZ EXTENDS FROM 
03N81W TO 09N121W TO 07N125W TO 08N140W. SCATTERED MODERATE 
CONVECTION IS WITHIN 60 NM N OF ITCZ AXIS BETWEEN 103W AND 124W.

...DISCUSSION...                                               
BROAD SFC RIDGE EXTENDS FROM 35N135W TO 28N132W TO 23N113W. HIGH 
PRESSURE OVER NE MEXICO MAINTAINS TIGHT GRADIENT ACROSS SOUTHERN 
MEXICO SUPPORTING SMALL AREA OF 20-30 KT WINDS IN THE GULF OF 
TEHUANTEPEC. WINDS IN TEHUANTEPEC WILL DIMINISH TONIGHT AND SUN 
AS HIGH WEAKENS AND SHIFTS NE. AREA OF 8-10 FT SEAS WILL ALSO 
SHRINK AND DRIFT DOWNSTREAM NEXT 12-24 HOURS AS FORCING WEAKENS. 

WINDS IN THE GULFS OF PAPAGAYO AND PANAMA WILL CONTINUE TO PULSE 
TO AROUND 20 KT LATE NIGHT/EARLY MORNING HOURS THROUGH MON FROM 
FRESH TRADES IN THE SW CARIBBEAN AND DIURNAL EFFECTS. 

UPPER TROUGH IN NW PORTION FROM 18N135W TO 27N141W IS STARTING 
TO LIFT NORTHWARD AND WEAKEN. LONG PERIOD NW SWELL WITH HEIGHTS 
TO 9 FT PERSIST N OF 07N W OF 130W. WAVE MODEL GUIDANCE INDICATE 
SEAS WILL SLOWLY SUBSIDE THROUGH EARLY SUN...FOLLOWED BY ANOTHER 
PUSH OF NW SWELL N OF 18N W OF 130W SUN NIGHT AND MON. 

$$
MUNDELL