000
AXPZ20 KNHC 132109
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC THU MAR 13 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.                           

...SPECIAL FEATURES...

GULF OF TEHUANTEPEC GALE WARNING...

GALE FORCE WINDS ARE OVER THE GULF OF TEHUANTEPEC. LATEST 
ALTIMETER READINGS SHOW 10 FT SEAS. EXPECT WINDS TO PEAK TO 45 
KT AND SEAS INCREASE TO 15 FT SHORTLY. THE WINDS AND SEAS WILL 
DIMINISH GRADUALLY FRIDAY EVENING AS THE HIGH PRESSURE THAT IS 
BEHIND THE FRONT SHIFTS EASTWARD ACROSS THE NORTHERN GULF OF 
MEXICO. SHORT PERIOD 8 TO 10 FT NE SWELL THAT IS GENERATED FROM 
THE GALE WILL COVER THE AREA FROM 08N TO 13N BETWEEN 95W AND 
103W ON FRIDAY. THE NORTHEASTERLY SWELL WILL MIX WITH LONGER 
PERIOD NORTHWESTERLY SWELL. THIS WILL DECAY BELOW 8 FEET THROUGH 
FRIDAY NIGHT.

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

ITCZ EXTENDS FROM 06N87W TO 05N93W TO 01N102W. SCATTERED 
MODERATE CONVECTION IS FROM 03N TO 06N BETWEEN 87W AND 96W. 

...DISCUSSION... 

IN THE UPPER LEVELS...A SHARP UPPER LEVEL TROUGH IS OVER THE 
WESTERN AREA N OF 5N W OF 125W. UPPER LEVEL DIFFLUENCE E OF THE 
UPPER LEVEL TROUGH IS PRODUCING OVERCAST HIGH CLOUDS FROM 05N TO 
20N W OF 130W. MOSTLY ZONAL FLOW IS BETWEEN 110W AND 125W.  
UPPER LEVEL RIDGING IS E OF 110W. 

ON THE SURFACE...A 1027 MB HIGH IS JUST N OF THE AREA AT 
32N139W. SURFACE RIDGING IS OVER THE NW AREA N OF 15N AND W OF 
115W. A NEW NW SWELL TRAIN HAS ENTERED THE NW CORNER WITH SEAS 
TO 9 FT. THIS SWELL WILL MOVE E OVER THE NEXT 24 HOURS AND 
REMAIN N OF 26N. ELSEWHERE AN AREA OF 20 TO 25 KT TRADEWINDS IS 
FORECAST FOR FRI AFTERNOON FROM 08N TO 12N BETWEEN 130W AND 140W 
WITH SEAS TO 8 FT. 

OTHER GAP WINDS...STRONG WINDS ARE EXPECTED IN THE GULF OF 
PAPAGAYO BY EARLY FRI MORNING. THE HIGH PRES BUILDING BEHIND THE 
FRONT WILL INCREASE THE TRADEWIND FLOW OVER THE SW CARIBBEAN. 
WITH ADDED OVERNIGHT DRAINAGE IMPACTS...THESE WINDS WILL FILTER 
INTO THE GULF OF PAPAGAYO TONIGHT AND AGAIN ON SATURDAY NIGHT 
WITH SEAS BRIEFLY BUILDING TO 8 FT DOWNSTREAM. SIMILARLY A PULSE 
OF FRESH TO STRONG GAP WINDS CAN BE EXPECTED IN THE GULF OF 
PANAMA SAT NIGHT PUSHING SOUTH OF THE AZUERO PENINSULA. 

$$
FORMOSA