000
AXPZ20 KNHC 091519
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SUN MAR 09 2014

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...              

NO MONSOON TROUGH IS PRESENT. THE ITCZ AXIS EXTENDS FROM 04N101W 
TO 03N109W TO 06N118W TO BEYOND 05N140W. SCATTERED MODERATE 
ISOLATED STRONG CONVECTION WAS NOTED WITHIN 60 NM OF AXIS 
BETWEEN 128W AND 132W.

...DISCUSSION...

A STALLING COLD FRONT EXTENDS FROM 30N136W TO 27N140W WITH A 
WEAKENING 1023 MB SURFACE HIGH PRESSURE CENTERED NEAR 32N127W. 
WITH BOTH HIGH PRESSURE AND THE FRONTAL BOUNDARY WEAKENING...THE 
PRESSURE GRADIENT BETWEEN THE FEATURES HAS LOOSENED AND GENTLE 
TO MODERATE WINDS PREVAIL IN THE VICINITY OF THE FRONT. HIGH 
PRESSURE BUILDING W OF THE FRONT WILL TIGHTEN THE GRADIENT W OF 
THE FRONT AND STRENGTHEN WINDS BY THIS AFTERNOON. THE FRONT WILL 
STALL FROM NEAR 30N135W TO 27N140W BY MON MORNING WHERE IT WILL 
SLOWLY DISSIPATE THROUGH TUE MORNING. WITH THE FRONT 
DISSIPATING...WINDS IN THE VICINITY OF THE FRONT WILL ONCE AGAIN 
DIMINISH TO 20 KT OR LESS BY MON EVENING. MODERATE TO FRESH 
TRADEWINDS ARE NOTED N OF THE ITCZ TO NEAR 20N. THE MODERATE TO 
FRESH TRADES ARE EXPECTED TO CONTINUE OVER THIS AREA THROUGH AT 
LEAST TUE MORNING. FRESH TO STRONG WINDS CONTINUE TO PREVAIL 
OVER THE NORTHERN GULF OF CALIFORNIA. THESE WINDS WILL DIMINISH 
TONIGHT AS HIGH PRES OVER THE GREAT BASIN REGION WEAKENS.

THE FIRST SET OF NW SWELLS THAT HAVE BEEN AFFECTING THE FORECAST 
AREA THE PAST FEW DAYS HAS SUBSIDED BELOW 8 FT. THE SECOND SET 
OF NW SWELL THAT HAS PROPAGATED INTO THE AREA IN ASSOCIATION 
WITH THE COLD FRONT IS PEAKING NEAR 13 FT THIS MORNING OVER THE 
FAR NW WATERS. SEAS 8 FT OR GREATER ASSOCIATED WITH THIS SWELL 
ARE COVERING THE FORECAST WATERS W OF A LINE FROM 30N129W TO 
19N140W. THIS SET OF NW SWELLS WILL CONTINUE TO PROPAGATE SE 
WHILE SUBSIDING OVER THE NEXT COUPLE OF DAYS. 

GAP WINDS...WINDS WILL BE PRIMARILY LIGHT AND VARIABLE DURING 
THE DAYLIGHT HOURS IN TEHUANTEPEC...FONSECA... PAPAGAYO...AND 
PANAMA THROUGH EARLY THIS WEEK. WINDS WILL INCREASE TO MODERATE 
TO FRESH LEVELS DURING NOCTURNAL DRAINAGE FLOW LATE EACH NIGHT 
AND EARLY MORNING. SEAS WILL BE PRIMARILY 3-5 FT.

$$
AL