AXPZ20 KNHC 121440
Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1605 UTC Mon Apr 12 2021
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
Based on 1200 UTC surface analysis and satellite imagery
through 1440 UTC.
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
A surface trough extends from 08N83W to 05.5N90W to 06N101W. The
ITCZ continues from 06N101W to 07N113W to 02N130W to beyond
02N140W. Scattered moderate convection is noted from 03N TO
07N between 110W and 125W, and from 01N to 09N between 130W and
OFFSHORE WATERS WITHIN 250 NM OF MEXICO...
A ridge of high pressure prevails west of the Baja California,
and extends southeast to offshore of Cabo Corrientes along 112W.
The pressure gradient between the ridge and a trough over the
Gulf of California is supporting moderate to fresh northerly
winds off of Baja California Norte, and moderate winds off Baja
California Sur. Light to gentle westerly winds prevail elsewhere
across the offshore waters. Seas are in the 6-10 ft range west
of Baja California Norte, 5-6 ft off Baja California Sur, 3-5 ft
over the remainder of the open waters off Mexico, and 1-3 ft
over the Gulf of California.
Moderate to fresh NW winds will prevail west of Baja California
Norte through Tue as the ridge persists. Increased NW swell off
Baja California Norte will prevail into Wed, peaking near 10 ft
this morning, highest across the outer waters. Gentle to
moderate winds are expected elsewhere into Wed. Winds and seas
are expected to diminish slightly areawide Wed through Fri as
the high pressure weakens.
OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and
WITHIN 750 NM OF ECUADOR...
Light to gentle winds prevail across the forecast area, with
seas in the 3-5 ft range. Little change in wind and wave
conditions are expected into Tue, before moderate offshore gap
winds begin across the Papagayo region. Moderate sized SW swell
crossing the equator tonight will move through the offshore
waters through Thu to raise seas slightly.
REMAINDER OF THE AREA...
High pressure ridging prevails across the northern waters. The
pressure gradient between this area of high pressure and lower
pressure in the vicinity of the ITCZ is supporting moderate
trades north of the ITCZ to near 20N and west of 120W. Gentle to
moderate winds prevail elsewhere. Seas are in the 8-10 ft range
over the waters N of 26N between 120W and 130W. Seas in the 4-6
ft range prevail elsewhere. No significant change is expected the
next couple of days. High pressure will shift into the northern
waters Wed through Thu, and slightly strengthen trade winds north
of the ITCZ. Northerly swell will propagate south of 30N across
the waters between 118W and 130W through Wed.