000
AXPZ20 KNHC 202040
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1808 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 1800 UTC surface analysis and satellite imagery through
2040 UTC.

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

A surface trough extends from 07.5N96W to low pres near 07N101W 
to 05.5N117W. The ITCZ continues from 05.5N117W to 06N128W then 
resumes from 05N133W to 04N140W. Scattered moderate convection is
noted from 01N to 07N between 90W and 97W. Scattered moderate 
isolated strong convection is from 03N to 12N between 99W and 
105W. Scattered moderate isolated strong convection is noted from
08N to 14N between 113W and 119W. Scattered moderate convection 
is from 03N to 08N W of 130W.

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
moderate to fresh NW winds west of the Baja California peninsula.
Light to gentle winds prevail elsewhere. Seas are in the 5-7 ft
range over the open waters in a mix of SW and NW swell. Seas are
2 ft or less over the Gulf of California. 

High pressure centered NW of the area will build through the
middle of the week. This will strengthen winds west of Baja
California Norte. The high pressure center then will weaken and
shift slightly further from the area. This will loosen the
pressure gradient enough to diminish winds to 20 kt or less by 
late Wed. Fresh NW swell will propagate into these waters 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 pressure pattern prevails. Gentle to locally moderate
winds prevail over the Gulf of Papagayo and Gulf of Panama as
well as the forecast waters between the Galapagos and Ecuador.
Light the gentle winds prevail elsewhere. Seas are in the 6-7 ft
range between the Galapagos and Ecuador in SW swell. Seas in the
4-6 ft range prevail elsewhere. The weak pressure pattern will
continue though Sat, keeping winds mainly in the light to gentle
range. Little change in seas is expected through remainder of the
week into the first half of the weekend.

REMAINDER OF THE AREA...

High pressure prevails just N of the forecast waters near 31N132W.
A few perturbations prevail across the tropical waters. Low pres
of 1010 MB is centered near 07N101W. A surface trough extends 
from 12N114W to 07N116W. Another surface trough extends from 
10N128W to 01N131W. The pressure gradient between the area of 
high pressure and lower pressure in the vicinity of the ITCZ and 
surface trough is supporting moderate to fresh winds from 09N to 
22N W of 120W, as well as from 09N to 15N between 115W and 120W. 
Gentle to moderate winds prevail over the NW quadrant of the low.
Light to gentle winds prevail elsewhere. Seas are in the 5-7 ft 
range in a mix of NW and SW swell, except to 8 ft over the far NW
waters.

The perturbations are forecast to move westward through the week.
The high center will build N of the forecast waters. This will 
help tighten the pressure gradient across much of the waters N of
the ITCZ, supporting fresh to locally strong trades over the 
tradewind zone N of the ITCZ. Winds will diminish by the end of 
the week as the high weakens and pressure gradient loosens. NW 
swell to around 8 ft has moved into the western waters N of the 
ITCZ. Seas will build across the area of increasing trades as the
NW swell combines with the fresh NE wind waves.

$$
AL