000
AXPZ20 KNHC 222118
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
2118 UTC Sat Apr 22 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 1800 UTC surface analysis and satellite imagery through
2100 UTC.

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

The northern part of a near-equatorial double ITCZ extends from 
05N91W to 06N113W to 03N122W to 03N140W. Scattered moderate 
isolated strong convection is evident near the ITCZ axis, from 
03N to 07N between 111W and 134W.
 
...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Weak ridging reaching from the north central Pacific to south of
the Baja California Peninsula is maintaining generally gentle to 
to moderate winds across the region. An altimeter pass from this
morning indicated seas to 9 ft off the coast of Baja. This is due
to ongoing northerly swell reaching as far south as the
Revillagigedo islands. A cold front well west of the area will be
weaken as it moves eastward across the region north of 25N 
through early Monday. High pressure building the wake of the
front will support fresh to strong northerly winds off Baja
California Norte late Sunday through mid week. Strong westerly
gap winds are likely over the northern portions of the Gulf of
California late Monday into the early Tuesday as the weakening
cold front moves through the area. Farther south, strong winds
will develop through the Gulf of Tehuantepec Sunday and Monday as
strong high pressure follows a cold front moving through the Gulf
of Mexico north of the area. 
 
OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND 
WITHIN 750 NM OF ECUADOR...

Light to gentle winds mostly onshore flow expected during the 
day becoming offshore along the coasts at night. Combined seas 
of 3 to 5 ft in mixed SW and NW swell forecast during the next 
several days.
 
REMAINDER OF THE AREA...
  
Altimeter data and observations from buoy 43010 near 10N124W
indicate seas of 8 to to 9 ft over a large area from 04N to 16N
and west of 120W. This is in mixed northeast and northwest swell. A
cold front extending from 30N130W to 25N140W will stall this 
evening and dissipate overnight. Large northwest swell associated
with the front will build seas of 9 to 12 ft behind the front 
today. Expect swell to propagate eastward reaching from the 
northern Baja Peninsula to 07N140W by late Sunday, then subside 
early next week.
 
$$
CHRISTENSEN