000
AXPZ20 KNHC 200307
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
157 UTC Wed Jun 20 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
0300 UTC. 

...TROPICAL WAVES...

The axis of a tropical wave is analyzed near 91W moving west 
near 15 kt. Scattered to locally numerous convection associated 
with this wave is described below.

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

The monsoon trough extends from 10.5N86W to 10.5N90W to 14N105W
to 10N121W. The ITCZ extends from 10N121W to 11N134W. Scattered
moderate isolated strong convection was noted from 04N to 10N
between 82W and 103W. Scattered moderate isolated strong convection
was noted from 12N to 15N between 90W and 94W. Scattered 
moderate convection was noted from 08N to 12N between 107W and 
119W. Scattered moderate convection was noted from 04N to 10N 
between 125W and 135W. 

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Moderate NW winds west of the Baja California peninsula will 
prevail through late Thu. Moderate seas offshore of the Baja 
peninsula will subside slightly by Thursday. A new pulse of 
northerly swell will propagate into the waters off Baja 
California Norte by the end of the week, building seas to near 8 
ft Saturday. Elsewhere, light to gentle winds will prevail over 
the open waters the next several days. Cross equatorial southerly
swell will propagate into the waters off Southern Mexico by the 
end of the week, which will build seas to near 7 ft by Saturday. 

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

The monsoon trough will prevail near 10N through Thu before 
slowly lifting northward. Light to gentle winds will prevail N of
the monsoon trough, with gentle to moderate S to SW winds 
prevailing S of the monsoon trough. A pulse of long period SW 
swell will reach the waters W of Ecuador by Thursday, with 
combined seas building to 7 to 9 ft late Fri, except in the lee 
of the Galapagos Islands. The swell will continue to spread 
across the southern forecast waters, with seas building to 5 to 8
ft S of 08N early Saturday. 
 
REMAINDER OF THE AREA...

High pressure of 1023 mb centered near 33N134W extends a ridge 
SE to near the Revillagigedo Islands. Light to gentle anticyclonic
wind flow prevails over the waters north of 20N, while gentle to
moderate trades prevail S of 20N and west of 120W, where seas 
are in the 5-7 ft range. Seas N of 20N will subside slightly to 
4-6 ft by Wednesday evening. A fresh pulse of northerly swell 
will propagate into the northern waters Thursday, with seas 
building to 6-8 ft north of 25N between 120W and 130W Friday. 
Southerly swell will cross the equator on Wed, building seas to 
6-9 ft south of 10N and west of 90W late Friday.

$$
AL