000
AXPZ20 KNHC 030907
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
504 UTC Wed Jan 3 2018

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 0600 UTC surface analysis and satellite imagery through
0900 UTC.

...SPECIAL FEATURES...

Gulf of Tehuantepec Gale Warning: The pressure gradient between high
pressure along the eastern coast of Mexico and a surface trough
over the eastern north Pacific is supporting gale force winds 
over the Gulf of Tehuantepec. Winds will peak near 45 kt, with 
seas peaking near 20 ft late tonight. It is possible that the 
gale force winds associated to this event will last into the 
weekend. Swell generated from the persistent gale force winds 
will propagate downstream of the Gulf of Tehuantepec, with seas 8
ft or greater reaching as far south as 05N and west to 110W by 
the end of the week. Refer to the latest high seas forecast 
issued under AWIPS/WMO headers HSFEP2/FZPN03 for more details.

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

A surface trough extends from 08N82W to 06N111W. The ITCZ 
extends from 06N111W to 10N126W to 09N140W. No significant 
convection. 

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Please see special features section above for more details about
the gale force gap wind event in the Gulf of Tehuantepec.

Relatively tranquil marine conditions will persist through the 
week with light to gentle winds prevailing across the forecast 
waters. Seas in the range of 3 to 5 ft will continue over most of
the offshore waters, while seas in the 1 to 3 ft range will 
prevail in the Gulf of California. NW swell will bring seas of 5 
to 7 ft into the waters off Baja California Norte later in the 
week.

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

NE winds will pulse to fresh to strong in the Gulf of Papagayo 
through the middle of the week. Winds will further increase to 
near gale force Thursday as high pressure builds north of the 
area. Light to gentle NE to E winds will prevail elsewhere N of 
09N, with gentle to moderate S to SW winds expected S of 09N.

REMAINDER OF THE AREA...

NW swell is propagating across the NW waters. Seas of 8 ft or
greater are covering the waters west of a line from 30N124W to 
21N127W to 14N140W, with seas peaking near 11 ft over the far NW
waters. The swell will continue to propagate southeastward, with
seas 8 ft or greater covering much of the water north of 10N and
west of 125W by the end of the week. Low pressure is expected to
develop over the NW waters by the end of the week into the 
weekend, bringing an increase in winds and seas over the waters 
north of 20N and west of 125W.

$$ 
AL