000
AXPZ20 KNHC 031453
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC TUE DEC 03 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 

THE MONSOON TROUGH EXTENDS FROM 07N77W TO 10N86W TO LOW PRES 
NEAR 07.5N114W TO 07N124W. THE ITCZ EXTENDS FROM 07N124W TO 
10N134W TO 08N140W. SCATTERED MODERATE CONVECTION IS WITHIN 120 
NM S OF THE MONSOON TROUGH BETWEEN  88W AND 91W.

...DISCUSSION...

1026 MB HIGH PRES IS NW OF THE AREA NEAR 38N143W WITH A COLD 
FRONT EXTENDING FROM JUST N OF THE SAN FRANCISCO BAY AREA TO THE 
NW. A RIDGE EXTENDS FROM THE HIGH SE TO A 1014 MB HIGH NEAR 
21N115W. THE PRESSURE GRADIENT BETWEEN THESE FEATURES IS 
INDUCING FRESH TO STRONG WINDS AND 8-10 FT SEAS SW OF POINT 
CONCEPTION CALIFORNIA. THE COLD FRONT WILL DISSIPATE DURING THE 
NEXT 24-36 HOURS WHILE THE HIGH NW OF THE AREA BUILDS TO THE S 
ACROSS THE NORTHERN PORTION OF THE DISCUSSION WATERS. THIS WILL 
ALLOW FOR WINDS TO INCREASE TO AT LEAST FRESH LEVELS AND FOR 
ASSOCIATED SEAS OF 8-9 FT IN N TO NE SWELL TO SNEAK INTO THE 
AREA N OF A LINE FROM 29N118W TO 26N140W BY 48 HOURS.

1011 MB LOW PRES IS TO THE S AND W OF THE RIDGING NEAR 21N135W. 
THIS LOW WHICH WAS PRODUCING GALE FORCE WINDS YESTERDAY IS 
WEAKENING WITH WINDS NOW AT FRESH TO STRONG LEVELS AND SEAS 8-10 
FT WITHIN 480 NM IN THE NW SEMICIRCLE OF THE LOW. THE LOW WILL 
CONTINUE TO WEAKEN...GRADUALLY DISSIPATING TO A TROUGH BY 24 
HOURS...WITH THE TROUGH DISSIPATING BY 36 HOURS.

1008 MB LOW PRES IS EMBEDDED IN THE MONSOON TROUGH NEAR 
07.5N114W. SCATTERED MODERATE TO STRONG CONVECTION IS WITHIN 210 
NM IN THE NE AND 120 NM IN THE SE QUADRANT OF THE LOW. OVERNIGHT 
SCATTEROMETER DATA SHOWED FRESH TO STRONG WINDS WITHIN 180 NM IN 
THE N QUADRANT...ALONG WITH 8-9 FT SEAS. THIS LOW IS FORECAST TO 
DISSIPATED WED AFTERNOON WITH ASSOCIATED WINDS AND SEAS 
DIMINISHING/SUBSIDING BY THEN.

MEANWHILE...WINDS IN ALL OF THE MAJOR E PACIFIC GULFS WILL BE 
MAINLY LIGHT TO LOCALLY MODERATE DURING THE NEXT 48 HOURS... 
ALONG WITH 1-3 FT SEAS.

$$
LEWITSKY