AXPZ20 KNHC 280900
Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1005 UTC Tue Mar 28 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
Based on 0600 UTC surface analysis and satellite imagery through
...INTERTROPICAL CONVERGENCE ZONE...
ITCZ axis extends from 05N89W to 02N105W. Scattered moderate
isolated strong convection is within 30 nm either side of
the axis between 90W and 97W.
OFFSHORE WATERS WITHIN 250 NM OF MEXICO...
High pressure north of the area extends a ridge southeast to
near the Revillagigedo Islands. The gradient between the ridge
and lower pressure inland over Mexico is supporting fresh to
strong NW winds west of Baja California Norte and moderate to
fresh N-NW winds west of Baja California Sur. Gale force winds
off the coast of southern California will generate large long
period NW swell that will propagate into the waters off Baja
California and peak near 13 ft Tuesday. The high pressure will
remain nearly stationary over the next 48 hours.
Light winds and seas prevail over the Gulf of California. As the
high pressure builds eastward, NW winds will increase to 20-25
kt in the northern Gulf of California later this morning, then
spread southward into the central Gulf of California waters by
tonight with seas building to 4-6 ft, then diminish Wednesday as
the high weakens slightly. Light to gentle winds will prevail
elsewhere through the week.
OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND
WITHIN 750 NM OF ECUADOR...
Gap winds are not expected to be very significant the next few
days across Central America. Light to gentle winds and 3-5 ft
seas are expected to prevail over the forecast waters the next
REMAINDER OF THE AREA...
High pressure of 1032 mb located north of area near 35N132W
dominates the subtropical eastern Pacific. The pressure gradient
between this high and the near-equatorial trough is supporting
fresh to strong trades south of 21N and west of 125W. Seas over
this area are in the 8-11 ft range in a mix of long period NW
swell and NE wind waves. The aerial extent of the trades will
peak this morning then diminish through Wednesday as the nearly
high weakens slightly. Marine conditions over the forecast area
will change little during the next 48 hours under the influence
of this broad ridge.