000
AXPZ20 KNHC 280330
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS NATIONAL HURRICANE CENTER MIAMI FL 
0405 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0300 UTC.
 
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 

ABBREVIATED MONSOON TROUGH FROM 04N77W TO 03N83W. DISCONTINUOUS 
ITCZ EXTENDS FROM 03N83W TO 08N110W...CONTINUES FROM 08N123W TO 
07N140W. NO SIGNIFICANT CONVECTION.

...DISCUSSION... 

UPPER LEVEL LOW CENTERED OVER WEST TEXAS NEAR 32N103W WITH UPPER 
TROUGH ALONG 105W DIGGING ACROSS NORTHERN MEXICO. THE UPPER 
TROUGH IS SUPPORTING WEAK 1016 MB LOW PRES IN THE SW GULF OF 
MEXICO. INTERACTION WITH STRONG HIGH PRES IN SOUTH TEXAS HAS A 
TIGHT PRESSURE GRADIENT OVER SOUTHERN MEXICO... ALLOWING STRONG 
GAP FLOW TO CONTINUE THROUGH THE CHIVELA PASS INTO THE GULF OF 
TEHUANTEPEC INDICATED BY OSCAT PASS AT 1800 UTC. 20-30 KT WINDS 
TONIGHT WILL GRADUALLY DIMINISH SAT MORNING THEN BECOME LIGHT BY 
SAT NIGHT. ANOTHER MINIMAL GALE FORCE WIND EVENT IS POSSIBLE TUE 
MORNING AND AGAIN WED MORNING DURING PEAK DIURNAL DRAINAGE AS A 
COLD FRONT MOVES ACROSS THE WESTERN GULF OF MEXICO.

TRADE WIND SURGES IN THE SW CARIBBEAN WILL SUPPORT DIURNAL 
PULSES OF FRESH TO STRONG GAP WINDS IN THE GULF OF PAPAGAYO AND 
FRESH GAP WIND FLOW INTO THE GULF OF PANAMA THROUGH SUNDAY.

DIVERGENCE ALOFT E OF A CUT OFF UPPER LOW CENTERED NEAR 19N142W 
IS CAUSING MULTI-LAYERED CLOUDINESS WITH EMBEDDED SHOWERS IN NW 
PORTION OF DISCUSSION AREA W OF 132W.
 
$$
MUNDELL