Tropical Weather Discussion
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000
AXPZ20 KNHC 230907
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1005 UTC Thu Feb 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 0600 UTC surface analysis and satellite imagery through
0900 UTC.

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

There is no ITCZ over the forecast waters north of the equator.

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Winds and seas have fallen below advisory criteria over the Gulf
of Tehuantepec. Elsewhere, a tight pressure gradient between
high pressure west of the Baja California peninsula and a trough
along western Mexico continues. Overnight ASCAT pass depicts
strong to near gale winds off the coast of Baja California Norte
as a result of this tight gradient. Strong winds also prevail
over the far northern Gulf of California. Seas off the coast of
Baja California Norte are in the 8-11 ft range. The area of high
pressure northwest of the area will weaken by Saturday. This
will loosen the pressure gradient over the area, and winds will
diminish below advisory criteria. Northwest swell will continue
to prevail off the west coast of Baja California, maintaining
seas 8 ft or greater through Friday night. Seas are expected to
subside below 8 ft by late Friday night. A fresh set of
northwesterly swells will arrive offshore Baja California Norte
by Monday.

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

Light to gentle winds will prevail through Saturday. Winds will
freshen off the coast of Central America Saturday night through
Sunday night as offshore gap winds develop in response to
building high pressure over the Caribbean.

REMAINDER OF THE AREA...

Slowly subsiding NW swell continues to propagate across the
forecast waters. Seas greater than 8 ft cover much of the
forecast waters north of 10N and west of 115W. Areal coverage of
seas greater than 8 ft continues to decrease. By Friday, seas
will subside below 8 ft over most of the forecast area, except
over the northwest waters as a cold front moves into the area
and ushers in fresh northwest swell. Combined seas associated
with this swell will peak around 12 ft Saturday night over the
northwest waters. Strong to near gale winds are expected both
ahead of, and behind, the front as it crosses the northern waters
this weekend.

$$
AL


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