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Eastern North Pacific Tropical Weather Discussion



000
AXPZ20 KNHC 212036
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
2205 UTC Sun Apr 21 2024

Tropical Weather Discussion for the eastern Pacific Ocean from
03.4S to 30N, east of 120W including the Gulf of California, and
from the Equator to 30N, between 120W and 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
2000 UTC.

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

A surface trough extends from 08N78W to 07N96W. The ITCZ 
continues from 07N96W to 05N113W to 04.5N140W. Scattered 
moderate convection is noted from 00N to 08N E of 86W, from 02N 
to 07N between 86W and 96W, and from 03N to 07N between 122W and
140W. 

...OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A surface ridge extends from a 1032 mb high pressure centered 
near 42N133W SE to the Revillagigedo Islands. The pressure 
gradient between this area of high pressure and a trough western 
Mexico is supporting gentle to moderate winds west of the Baja 
California peninsula. Light to gentle winds prevail elsewhere. 
Seas are in the 4-6 ft range over the open waters off Mexico, and
3 ft or less over the Gulf of California. 

For the forecast, gentle to moderate winds winds and moderate 
seas will persist west of the Baja California peninsula through 
the middle of this week. Winds will then locally freshen Thu and 
Fri. Fresh to strong gap winds will develop in the Gulf of 
Tehuantepec late tonight, and continue through Tue before 
diminishing. Seas will peak near 10 ft Mon night with the gap 
winds. Elsewhere, light to gentle winds and moderate seas will 
prevail. 

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

Light to gentle winds, and seas of 4-6 ft prevail across the 
discussion waters.

For the forecast, light to gentle breezes will persist across the
region through the week. Wave heights will be mostly 4 to 6 ft 
primarily in SW swell, building to 5 to 7 ft off Ecuador tonight.
Moderate to occasionally fresh gap winds will develop in the 
Gulf of Papagayo Tue, then continue through the week. 

...REMAINDER OF THE AREA...

A 1032 mb high pressure is centered near 42N133W, with ridge 
extending SE to near the Revillagigedo Islands. The pressure 
gradient between the area of high pressure and lower pressure in 
the vicinity of the ITCZ is supporting moderate to fresh trade 
winds from 05N to 20N between 120W and 140W, where seas are in 
the 7-9 ft range. A frontal trough is over the NW waters from 
30N134W to 27N138W. Moderate winds and seas of 6-7 ft are west of
the frontal boundary. Gentle to moderate winds are noted N of 
28N between 120W and 128W where the pressure gradient is locally 
tighter between the ridge and trough over the Gulf of California.
Mainly gentle winds are noted elsewhere across the discussion 
waters. Aside from the areas mentioned above, seas are in the 4-6
ft range. 

For the forecast, wind speeds and wave heights will remain 
similar into early this week, with an area of 8 ft seas 
persisting roughly from 08N to 12N W of 130W with N swell mixing 
with NE wind waves. The frontal trough will dissipate today. 
Looking ahead, a weak surface low will enter the north-central 
portion of our waters by mid-week enhancing winds/seas.

$$
AL