000
AXPZ20 KNHC 202101
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1850 UTC Sat Jan 20 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 1800 UTC surface analysis and satellite imagery through
2100 UTC.

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

A surface trough extends from 08N78W to 05N84W to 07N95W. The 
ITCZ continues from 07N95W to 07N110W to 09N120W then resumes 
from 09N127W to beyond 08N140W. Scattered moderate with isolated
strong convection is noted within 60 nm N of the ITCZ between 
100W and 111W. Scattered moderate isolated strong convection was
noted from 08N to 13N between 111W and 125W. 

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

Gulf of Tehuantepec: Winds continue to diminish across the Gulf
of Tehuantepec. Fresh to strong winds will continue the next 24 
hours, before diminishing to 20 kt or less Sunday. Looking 
ahead, strong to near gale winds are expected again beginning 
Monday night and prevailing through Wednesday. 

Gulf of California: Fresh to strong winds are expected across 
the central and southern portions of the Gulf Sunday evening 
through Monday. These winds will then slowly diminish Monday 
night through Wednesday. 

Large NW swell continues to propagate SE across the waters west
of the Baja Peninsula, with seas of 8-13 ft prevailing. This 
large swell is producing high surf along coasts and outer reefs 
of Baja California and mainland Mexico. While seas will slowly 
subside the next couple of days, they are still expected to 
remain above 8 ft over this area through the middle of next 
week.

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

Nocturnal winds will pulse to fresh each night over the Gulf of 
Papagayo. Elsewhere N of 09N, light to gentle offshore flow will 
prevail. Gentle southerly winds will prevail S of 09N for the 
next few days. 

REMAINDER OF THE AREA...

High pressure of 1032 mb is centered just north of the area near
34N135W. The pressure gradient between this area of high 
pressure and lower pressure in the vicinity of the ITCZ is 
supporting strong fresh to strong winds from 11N to 25N and west
of 125W. Large NW swell continues to propagate across the 
forecast waters, with seas 12 ft or greater prevailing over much 
of the forecast waters north of 20N and west of 120W. Seas 8 ft 
or greater cover nearly all the the open waters N of 05N and west
of 100W. Fresh to strong trades will prevail north of the ITCZ 
to around 20N for the next several days. A surface trough 
embedded in the vicinity of the ITCZ along 122W is helping to 
generate convection across the area mainly east of the trough 
axis, discussed in the ITCZ section. 
   
$$
AL