000
AXPZ20 KNHC 091549
TWDEP 

Tropical Weather Discussion 
NWS National Hurricane Center Miami FL
1605 UTC Thu Mar 09 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 03N86W to 02N94W to 03N107W 
to where scatterometer winds indicate that the ITCZ forms, and 
continues w along 03N107W to 06N120W to 05N140W. Scattered 
moderate isolated strong convection is noted from 00N to 06N 
between 87W and 98W. 

...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A surface ridge will meander from roughly 21N116W to 14N98W 
through the upcoming weekend. Gentle to moderate w to nw flow is 
expected w of 105W through mid day on Fri, then a narrow swath 
of fresh nw winds forecast near 19.5N105.5W briefly on Fri 
evening. 

Gulf of Tehuantepec: Strong to near gale force northerly winds 
will continue across and downstream of the Gulf of Tehuantepec 
through sunrise on Sat morning, with the maximum seas building 
to 11 ft near 14.5N95W tonight. The next gap event will begin on 
Mon night, with guidance suggesting gale conditions on Tue 
evening.

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

Gulf of Papagayo: A large area of strong ne winds are expected
across the waters from 09N to 12.5N between 86W and 90W mainly 
during the late night hours tonight and again on Fri night. 
Guidance suggests one last brief nocturnal surge on Sat night. 
These strong winds will create a ne swell that will propagate sw 
mixing with cross equatorial sw swell resulting in an area of 
seas to ft near 08N93W.  

Gulf of Panama: Moderate to fresh nocturnal flow expected for 
the next few nights. 
  
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 33N131W and is 
maintaining broad ridging over the forecast area. A small area 
of strong ne trades across the tropics near 15N138W will 
diminish to a fresh breeze tonight. Mixed swell will result in 
combined seas of 5 to 8 ft across the area through Sun night.
 
$$ 
Nelson