000
AXPZ20 KNHC 280405
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
148 UTC Sat Apr 28 2018

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
0330 UTC.
  
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 

The monsoon trough extends from 08N79W to 07N84W to 06N90W to
09N105W to 06N110W. The intertropical convergence zone continues
from 06N110W to beyond 06N140W. Scattered moderate convection is
present from 03N to 09N between 81W and 92W, from 04N to 09N 
between 105W and 114W, and from 05N to 10N between 135W and 140W.

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Fresh to strong NW winds persist off the coast of Baja
California, between ridging west of the region and deep troughing
from the Great Basin through the Colorado River valley. The
stronger winds to 25 kt are off Baja California Norte where seas
are reaching 8 to 9 ft with an added component of NW swell. The
winds diminish briefly late Sun. NW swell in excess of 8 ft will
linger north of Punta Eugenia through early next week.

An upper low will shift southward down the West Coast early next
week. Fresh to strong deep layer SW winds will support a pulses 
of strong SW gap winds into the northern Gulf of California late 
Mon and again late Tue. Pulses of strong westerly gap winds are 
possible over the northern Gulf of California as the trough 
shifts eastward late Sun through Tue. 

Farther south, pulses of fresh to strong northerly winds are 
possible over the Gulf of Tehuantepec this weekend, particularly 
during Sat morning as nocturnal drainage flow augments the winds
generated by high pressure building over the western Gulf of 
Mexico.

Elsewhere, light to gentle winds will generally prevail through 
Mon, accompanied by 4 to 6 ft seas.

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

Fresh northeast nocturnal winds over and downstream of the Gulf 
of Papagayo will begin Sun night, then continue through at least 
Wed night. Gentle to moderate offshore flow will prevail 
elsewhere N of 09N, and light to gentle SW winds are expected S 
of 09N along with seas of 4 to 6 ft.

REMAINDER OF THE AREA... 

A ridge extends across the region north of 25N, supporting moderate
to locally fresh northeast trade winds and 7 to 8 ft seas across
the tropical waters south of the subtropical ridge and north of 
the ITCZ. These winds will increase to fresh to locally strong as
the pressure gradient increases over this region through Sun. 
This will lead to an increase in the areal coverage of 8 to 9 ft 
seas in this region. Winds and seas in this area will then 
decrease on Mon and Tue as the high centered N of the area shifts
northward and slowly weakens.
   
$$
Christensen