000
AXPZ20 KNHC 262107
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
2105 UTC Thu Apr 26 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 1800 UTC surface analysis and satellite imagery through
2000 UTC.
  
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 

A surface trough extends from 10N85W to 08N100W. The 
intertropical convergence zone continues from 08N100W to 08N120W
to beyond 06N140W. Scattered moderate convection is from 03N to 
11N between 80W and 90W and from 03N to 11N between 115W and 
129W. Isolated moderate convection is from 03N to 08N between 
103W and 109W and from 03N to 07W between 132W and 138W. 

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A ridge is building NW of the area and will continue to build
east over the next couple of days. This is bringing about
moderate to fresh NW winds in the offshore waters this afternoon
as confirmed by a recent scatterometer pass. Seas will build to 
8 ft tonight off Baja California Sur south of Cabo San Lazaro 
toward the Revillagigedo Islands in a combination of the 15 to 20
kt NW flow and longer period NW swell propagating through the 
region. The fresh NW winds will expand W of the rest of Baja 
California Fri into Sat and will become locally strong as 
troughing forms over the Colorado River valley north of the 
region. The large area of fresh to occasionally strong NW winds 
will support 8 to 10 ft seas off the Baja California coast 
through Sun. Winds and seas will slowly subside early next week 
over this area.

Light to gentle W to NW winds are expected in the Gulf of 
California through Sat. Periodic fresh to possibly strong winds 
may occur over the northern Gulf Sun through Tue due to 
troughing over the area. 

Farther south, fresh to strong northerly winds are possible in 
the Gulf of Tehuantepec this weekend, particularly during Sat 
morning as high pressure builds over the western Gulf of Mexico. 

Elsewhere, mainly light to gentle winds are expected through 
Sun with 4 to 6 ft seas.

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

Fresh northeast nocturnal winds are expected in and downstream 
of the Gulf of Papagayo beginning Sun night. Gentle to moderate 
offshore flow will prevail elsewhere N of 09N, and light to 
gentle SW winds are expected S of 09N with seas of 4 to 6 ft.

REMAINDER OF THE AREA... 

A surface trough, the remnants of a dissipated cold front,
extends from 30N127W to 25N136W. A ridge is building behind this
trough as the trough weakens. The ridge will continue to build 
through the weekend well after the trough dissipates. Moderate 
to fresh northeast trade winds and 7-9 ft seas are observed 
across the tropical waters W of 115W between 07N and 20N, south 
of the subtropical ridge and north of the the ITCZ. These winds 
will increase to fresh to locally strong as the pressure 
increases north of this region into the upcoming weekend. This 
will also result in an increase of the areal coverage of seas of 
8-9 ft. Winds and seas will decrease early next week as the high 
center shifts northward. 
   
$$
Latto