000
AXPZ20 KNHC 200244
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0405 UTC Sun Apr 19 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 0000 UTC surface analysis and satellite imagery through
0230 UTC.

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

A surface trough extends from 04N77W to 07N92W to low pressure
near 06N99W to 03N117W. The ITCZ continues from 03N117W to
05N126W, then resumes from 04N132W to 04N140W. Scattered 
moderate and isolated strong convection is noted from 02N to 10N
between 96W and 103W. Scattered moderate convection is noted from
09N to 12N between 104W and 117W, and from 05N to 07N between
130W and 140W.

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A ridge extends from 1022 mb high pressure centered near 27N134W
to S of Acapulco Mexico near 15N100W. Weak and ill-defined surface
troughing runs along the length of the Gulf of California. The 
pressure gradient between these features is supporting moderate
to fresh winds along the W coast of the Baja Peninsula, 
including Cabo San Lucas. Moderate winds were also noted near and
S of Cabo Corrientes. Light to gentle winds prevail elsewhere 
across the forecast waters. Seas are in the 5 to 7 ft range in 
the waters W of the Baja Peninsula, and 4 to 5 ft elsewhere 
across the open forecast waters. Seas ranging between 1 and 2 ft 
are found in the Gulf of California.

The high pressure ridge W of Baja California will weaken through
Mon evening in advance of a cold front or trough expected to 
cross northern Baja Mon evening. The ridge will rebuild Mon night
through Wed, then remain in place through Thu night, retreating 
westward Fri and Fri night with broad troughing developing W of 
Baja California Norte. Winds W of Baja California Norte will 
strengthen accordingly Mon night through Wed. Fresh NW swell will
propagate SE offshore of Baja California and cause seas to build
to between 7 and 9 ft Tue through Thu.

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 a 
surface trough near 06N to generally maintain light to gentle 
winds over the region through Fri night. Seas are in the 4 to 6 
ft range over and downstream of the Gulf of Papagayo region, and 
3 to 5 ft elsewhere, except across the waters between Colombia 
and Ecuador where seas are building to 5 to 7 ft in moderate SW 
swell.

Fairly tranquil marine conditions are anticipated for the
remainder of this week.

REMAINDER OF THE AREA...

A ridge extends from 1022 mb high pressure centered near 27N134W
to S of Acapulco near 15N100W. A surface trough is located to 
the S extending from 10N127W to 01N130W. The pressure gradient 
between these two features is supporting gentle to moderate winds
N of the ITCZ to 20N and W of 120W. Seas are mainly 5 to 7 ft 
across the open high seas waters, except near 8 ft in the 
vicinity of the trough per a recent altimeter pass. Low pressure 
measuring 1009 mb is near 06N99W. Gentle to moderate winds are 
present in the vicinity of the low. Light to gentle winds prevail
elsewhere.

The area of high pressure centered W of Baja will weaken in 
response to low pressure moving over the NE Pacific. This will 
allow trade winds to briefly diminish tonight. High pres will 
rebuild N of the forecast area by Mon night through Thu after 
low pressure over the NE Pacific moves E. This will strengthen 
tradewinds W of 120W during this time frame. The low pressure
near 06N99W will shift WNW during the next few days. Gentle to 
moderate winds are expected to prevail within 120 nm of the 
center of the low. Light to gentle winds are expected elsewhere 
for the next several days.

Long period NW swell will combine with NE wind waves and cause
seas to build to between 8 and 9 ft N of 10N and W of 130W Mon. 
The area of 8 ft seas will expand E to 120W on Tue and Wed 
before starting to recede W Thu. N swell will propagate into the
waters N of 25N and E of 125W, causing seas to build to between 8
and 9 ft Wed and Thu.

$$
Lewitsky