AXPZ20 KNHC 200230
Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0230 UTC Wed Mar 20 2019
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 0000 UTC surface analysis and satellite imagery through
Gulf of Tehuantepec Gale Warning: Strong winds over the Gulf of
Tehuantepec will pulse to near gale- force tonight. Winds will
pulse to minimal gale force during the overnight hours Wed and
Thu night with the additional component of drainage flow. Seas
will peak near 12 ft during the period of gale force winds.
Please see the latest High Seas Forecast issued by the National
Hurricane Center under AWIPS/WMO headers FZPN03 KNHC/HSFEP2 or
at website https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
A surface trough extends from 09N79W to 07N90W. The ITCZ
continues from 07N90W to 03N110W to beyond 04N140W. Scattered
moderate isolated strong convection was noted from 04N to 08N
between 83W and 87W. Scattered moderate isolated strong
convection from 06N to 08N between 88W and 95W.
OFFSHORE WATERS WITHIN 250 NM OF MEXICO...
Please read the Special Features section for more details about
the developing Gale Warning in the Gulf of Tehuantepec.
Gulf of California: A weak cold front will approach the northern
Gulf of California from late tonight into Wednesday. S to SW gap
winds will strengthen with the passage of the front.
Light to gentle winds prevail elsewhere over the open waters. NW
swell will propagate into the waters off the coast of Baja
California Norte tonight. The swell will spread southward across
the rest of the Baja Peninsula, with seas greater than 8 ft or
greater prevailing over this area by Thu before starting to
OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND
WITHIN 750 NM OF ECUADOR...
Gulf of Papagayo: Winds will pulse to strong during the overnight
hours across the Gulf of Papagayo through the forecast period.
Gulf of Panama: Northerly winds will freshen over the Gulf of
Panama Thursday night through Sun night.
Between Ecuador and the Galapagos Islands, 5-7 ft seas in SW
swell will persist through early Wed. Elsewhere, generally light
to moderate winds and 3-5 ft seas will prevail for the next
REMAINDER OF THE AREA...
A cold front extends from 30N121W to 25N123W to 22N127W. The
front has ushered in a large set of NW swell into the area. Seas
are currently peaking near 15 ft over the NW waters. The swell
will continue to propagate SE across the waters while subsiding
the next couple of days. By Thu afternoon, seas 8 ft or greater
will cover the area W of a line from 30N116W to 20N109W to
06N110W to 00N121W.
Elsewhere, moderate to fresh trade winds prevail mainly S of 18N
and west of 116W to the ITCZ. High pressure building in the wake
of the front will bring a slight increase to the trades Wed. Another
cold front will approach from the northwest toward the end of
the week, ushering in another set of large long period NW.