000
AXPZ20 KNHC 280917
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
917 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 0600 UTC surface analysis and satellite imagery
through 1030 UTC.
  
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 

The monsoon trough extends from 09N84W to 07N93W to 07N110W.  
The intertropical convergence zone continues from 07N110W to
beyond 06N140W. Scattered moderate convection is present north of
02N and east of 90W. Scattered moderate to isolated strong
convection is noted from 05N to 07N between 130W and 135W.

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

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

For the Gulf of California, 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, with 4
to 6 ft seas. 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, expect pulses of fresh to strong northerly winds 
over the Gulf of Tehuantepec through early Mon, particularly 
this 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... 

Persistent ridging north of 25N will continue to support light to
moderate flow north of 20N with 4 to 6 ft seas in NW swell, and 
fresh to locally strong trade winds with 6 to 9 ft seas farther 
south. Convergence of trade wind flow is contributing to the
scattered moderate to isolated strong convection from 05N to 07N
between 130W and 135W. Winds and seas in this area will then 
diminish through Tue as the subtropical ridge north of the area 
shifts northward and slowly weakens.
   
$$
Christensen