000
AXPZ20 KNHC 221603
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC FRI NOV 22 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.

...SPECIAL FEATURE...

STRONG HIGH PRES WILL BUILD SOUTHWARD ALONG E COAST OF MEXICO 
BEHIND A COLD FRONT MOVING INTO THE GULF OF MEXICO TONIGHT AND 
SIGNIFICANTLY TIGHTEN THE PRES GRADIENT ACROSS SOUTHERN MEXICO. 
NORTHERLY WINDS WILL FUNNEL THROUGH THE CHIVELA PASS INTO THE 
GULF OF TEHUANTEPEC...AND EXPECTED TO PRODUCE GALE FORCE WINDS 
SAT NIGHT THROUGH SUN EVENING. WINDS EXPECTED TO REACH 20-25 KT 
LATE TONIGHT. MAXIMUM SEAS WILL BUILD TO 12-13 FT SUN.

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

THE MONSOON TROUGH EXTENDS FROM 09N84W TO 10N95W...THEN ITCZ 
FROM 10N95W TO 10N101W TO 06N140W. NO SIGNIFICANT CONVECTION.

...DISCUSSION...

AN UPPER LEVEL LOW CENTERED NEAR LOS ANGELES CALIFORNIA EXTENDS 
A TROUGH SOUTHWARD TO 23N121W WITH A 90-100 KT JET THROUGH THE 
BASE OF THE TROUGH ALONG 120W.

A FRONTAL TROUGH EXTENDS FROM SURFACE LOW PRES NEAR SAN DIEGO 
CALIFORNIA TO 24N120W TO 21N130W. FRESH N WINDS AND BUILDING N 
SWELL WITH SEAS TO 13 FT ARE OCCURRING N OF 28N ASSOCIATED WITH 
THE FRONTAL TROUGH. WINDS WILL DIMINISH TODAY AND TONIGHT WHILE 
N SWELL SUBSIDES TO LESS THAN 8 FT BY SAT EVENING.
 
A WEAKENING N-S ORIENTED COLD FRONT WILL APPROACH THE NW CORNER 
OF THE AREA SUN ALONG 141W. FRESH TO STRONG SOUTHERLY WINDS AND 
SEAS TO 8-9 FT WILL PRECEDE THE FRONT IN THE EXTREME NW CORNER.

$$
MUNDELL