000
AXPZ20 KNHC 111549
TWDEP 

Tropical Weather Discussion 
NWS National Hurricane Center Miami FL
1605 UTC Sat Mar 11 2017

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 
1545 UTC.

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

A surface trough extends w from 05N88W to a 1008 mb surface low 
pressure at 01N101W. Scatterometer winds indicate that the ITCZ 
is just s of the discussion area along 03.4S between 107W and 
120W. Scattered moderate isolated strong convection is noted 
within 120 nm either side of a line from 04N79W to 03.4S85W, 
within 30 nm either side of a line from 08N85W to 03N90W, and 
within 60 nm either side of a line from 05N99W to 02N105W.  

...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A surface ridge will extend from nw to se seaward of 200 nm for 
the next few days. Gentle to moderate w to nw flow to the w of 
105W will diminish to a light to gentle breeze on Sun, except 
for a narrow swath of moderate nw winds forecast to pulse near 
20N106W. 

Gulf of Tehuantepec: The next gap event will begin late Sun 
night with strong to near gale force conditions at sunrise on 
Mon. The n winds will diminish briefly on mon afternoon. Another 
event will begin on Mon evening and continue through Tue, with 
guidance suggesting gale conditions on Tue evening and Wed 
evening.

OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND 
WITHIN 750 NM OF ECUADOR...

Gulf of Papagayo: An narrow swath of strong ne winds will occur 
tonight. 

Gulf of Panama: Moderate to fresh nocturnal flow expected 
tonight.
  
Light to gentle winds, and combined seas of 3 to 6 ft, are 
occurring elsewhere outside of the swells originating near the 
gap events. 

REMAINDER OF THE AREA...

A nearly stationary surface high is centered near 31N132W and is 
maintaining broad ridging over the forecast area with fresh to
locally strong ne trades across the tropics from 05N to 15N w of 
120W for the next several days. Mixed swell will result in 
combined seas of 6 to 9 ft across the area through late Sun 
night.

Fresh sw winds, and 6 to 9 ft seas, will develop across the 
waters n of 30N w of 136W on Tue ahead of a cold front reaching 
30N140W late Tue night. The front will stall on Wed, and drift 
back n of 32N by Thu.  
$$ 
Nelson