000
AXPZ20 KNHC 201445
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1357 UTC Mon Apr 20 2020

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 1200 UTC surface analysis and satellite imagery through
1440 UTC.

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

A surface trough extends from 06N94W to low pres near 07N101W to
05N117W. The ITCZ continues from 05N117W to 06N128W then resumes
from 05N133W to 04N140W. Scattered moderate isolated strong 
convection is from 02N to 10N between 97W and 105W. Scattered
moderate convection is from 03N to 10N W of 128W.

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A ridge extends from NW to SE across the offshore waters while a
surface trough extends along the Gulf of California. The 
pressure gradient between these two features is supporting fresh 
to locally strong NW winds from near Punta Eugenia northward. 
These conditions are forecast to persist through the middle of 
the week, then will diminish by the end of the week as the 
ridging retreats westward and broad low pressure develops just W 
of Baja California Norte. Fresh NW swell will propagate into this
same area which will build combined seas to 8 to 10 ft before 
subsiding by the end of the week. 

Elsewhere, gentle to moderate winds will prevail through the week
along with 4 to 7 ft seas.

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

A weak high pressure ridge N of the area will combine with the 
equatorial trough to maintain light to gentle winds over the 
region through Fri night, except gentle to moderate in the 
waters S-SW of the Galapagos Islands. Seas of 4 to 7 ft prevail 
across the region, with the highest seas across the waters 
between mainland Ecuador and the Galapagos Islands in moderate SW
swell. Little change in seas is expected through the week.

REMAINDER OF THE AREA...

A ridge extends from 1024 mb high pressure near 26N138W to near 
the Revillagigedo Islands. Light and gentle winds were noted N 
of 24N and W of 125W. 

A pair of surface troughs are analyzed S of the ridge. The 
eastern trough extends from 12N114W to 07N115W. Scattered 
moderate and isolated strong convection was noted from 08N to 12N
between 112W and 117W. The western trough extends from 12N128W 
to 02N131W. Winds N of the ITCZ to 24N and W of 110W are 
moderate to locally fresh, with seas in the 5 to 7 ft range.

The troughs are forecast to move westward through the week with
transient low pressure coming and going along the eastern trough.
The high center will lift northward while strengthening. This
will help tighten the pressure gradient across much of the 
waters N of the ITCZ, supporting trades of fresh to locally 
strong. Winds will diminish by the ned of the week as the high 
weakens and pressure gradient loosens. NW swell will to around 8
ft will move into the western waters N of the ITCZ later today. 
Seas will build across the area of increasing trades as the NW 
swell combines with the fresh NE wind waves.

$$
AL