000
AXPZ20 KNHC 050958
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS NATIONAL HURRICANE CENTER MIAMI FL 
1005 UTC THU DEC 05 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...       
MONSOON TROUGH EXTENDS FROM 08N78W TO LOW PRES 1010 MB AT 09N97W
TO 07N100W THEN ITCZ TO 10N118W .  ITCZ RESUMES FROM LOW PRES
1009 MB AT 09N125W 07N130W TO BEYOND 08N140W.  NO SIGNIFICANT
CONVECTION. 
 
...DISCUSSION... 
QUICKLY FILLING UPPER LEVEL TROUGH EXTEND FROM 32N121W TO
15N119W SUPPORTING COLD FRONT WHICH EXTENDS FROM 29N115W TO
25N131W.  COLD FRONT BECOME DIFFUSE FRI AND ALLOWS VIGOROUS HIGH
PRES TO BUILD BEHIND FRONT WITH ZONAL WINDS ALOFT N OF 22N. 
HIGH PRES BRINGS FRESH TO STRONG NE TO E BREEZE WITH SEAS TO 10
FT TO BASIN N OF 13N W OF 124W.  UPPER LEVEL RIDGE CREST MOVES
INTO E PAC ACROSS 140W FRI NIGHT ALLOWING NEXT COLD FRONT TO
APPROACH BASIN DURING THE WEEKEND.

ELSEWHERE...LARGE UPPER LEVEL ANTICYCLONE OVER YUCATAN PENINSULA
HAS RIDGE EXTENDING W TO 110W WITH VERY DRY SUBSIDING AIR MASS
KEEPING LID ON VERTICAL CLOUD DEVELOPMENT EVEN OVER MONSOON
TROUGH AND WEAK LOW PRES AT 09N98W.

LOOKING AHEAD...
WEAK GULF OF TEHUANTEPEC EVENT IS EXPECTED DURING THE WEEKEND...
BUT REMAINING BELOW GALE FORCE WINDS AND SEAS UP TO 10 FT.  

ANOTHER COLD FRONT EXPECTED TO APPROACH NW CORNER OF BASIN WITH
SE TO S WINDS INCREASING TO A STRONG LEVEL N OF 28N W OF 135W BY
SAT NIGHT.

$$
WALLY BARNES