Tropical Weather Discussion
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056
AXPZ20 KNHC 230224
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
044 UTC Sun Apr 23 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 0000 UTC surface analysis and satellite imagery through
0300 UTC.

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

ITCZ axis extends from 03N91W to 06N125W, and from 04N128W to
03N140W. Scattered moderate to isolated strong convection is
observed from 03N to 05N between 120W and 130W.

...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 earlier 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 southwest and northwest swell forecast
during the next several days.

REMAINDER OF THE AREA...

Earlier altimeter data and observations from buoy 43010 near
10N124W indicated 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



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