000
AXPZ20 KNHC 231531
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1605 UTC Sun Apr 23 2023

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 1200 UTC surface analysis and satellite imagery through
1500 UTC.

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

The monsoon trough extends from 07N78W to 09N102W. The ITCZ 
continues from 03N100W to 00N126W. Scattered moderate convection
is noted from 04N to 13N and E of 115W.

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

Moderate winds dominate off Baja California with 6 to 9 ft 
combined seas in NW swell. Light breezes prevail elsewhere with 3
to 5 ft combined seas in open waters with southerly swell. The 
mild marine conditions are due to a relatively weak pressure 
gradient in place between 1005 mb low pressure over the Colorado
River Valley and 1026 mb high pressure centered over the eastern
Pacific between California and Hawaii. Smoke from agricultural 
fires is restricting visibility within about 120 nm of shore over
offshore waters S of Cabo Corrientes. 

For the forecast, moderate to fresh NW winds will prevail beyond
90 nm offshore Baja California Norte through tonight as low 
pressure deepens over the Colorado River Valley. This pattern 
will also allow fresh strong gap winds to pulse through tonight 
over parts of the northern Gulf of California. Large NW swill 
will also impact waters beyond 90 nm offshore Baja California 
Norte through Mon, before subsiding Tue night. Gentle to moderate
breezes and slight to moderate combined seas will persist 
elsewhere through late week. Some smoke may restrict visibility 
nearshore southern Mexico today. 

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

Light to gentle breezes and slight to moderate combined seas in 
SW swell dominate the region. Scattered thunderstorms persist 
S of Panama and Costa Rica near the monsoon trough. 

For the forecast, a weak pressure gradient will support light to
gentle breezes across the region through late week. Expect 
slight to moderate combined seas primarily in S to SW swell. 
 
...REMAINDER OF THE AREA...

The subtropical ridge is anchored by 1026 mb high pressure 
centered near 32N140W and extends southeastward to southern 
Mexico. This pattern is supporting moderate to fresh trade winds 
north of 06N and west of 120W. Gentle to moderate breezes are 
evident elsewhere. Combined seas are 6 to 8 ft in NW to N swell 
from 06N to 15N and west of 135W and N of 27N E of 125W. Seas are
4 to 6 ft elsewhere.

For the forecast, large NW swell will persist through Tue night 
for waters north of 25N and east of 125W. High pressure will 
continue to shift west and weaken further into early week, 
leading to a continued decrease in trades west of 125W. Seas west
of 125W will also fall below 8 ft tonight.

$$
ERA