000
AXPZ20 KNHC 200830
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1005 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 0600 UTC surface analysis and satellite imagery through
0800 UTC.

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

A surface trough extends from the Pacific coast of Colombia near
04N77W to 07N91W to low pressure near 06N100W to 03N113W to
04N118W. The ITCZ continues from 04N118W to 05N128W then resumes
from 05N132W to 04N140W. Scattered moderate convection is from
04N to 11N between 99W and 103W, and from 03N to 11N W of 131W.

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 Baja California peninsula. The
pressure gradient between these two features is supporting fresh
to 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 and combined with the winds 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 1023 mb high pressure near 27N136W to near
the Revillagigedo Islands. The remnants of a frontal boundary are
draped around the high center from 30N130W to 29N135W to 
30N139W. Light and gentle winds were noted by recent 
scatterometer data N of 24N and W of 125W. 

A pair of surface troughs are analyzed S of the ridge. The 
eastern trough extends from 13N112W to 06N115W. This trough is 
the remnants of a low pressure area and scattered moderate and 
isolated strong convection was noted N of 10N within 240 nm W of
the trough axis. The western trough extends from 12N128W to
02N131W. Associated convection is described above. Winds N of the
ITCZ to 24N and W of 110W are moderate to locally fresh along
with 5 to 7 ft seas.

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 along for
the pressure gradient to tighten across much of the waters N of 
the ITCZ supporting trades of fresh to locally strong, 
diminishing by the ned of the week as the high weakens. NW swell 
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.

$$
Lewitsky