000
AXPZ20 KNHC 180901
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
604 UTC Thu May 18 2017

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.

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

The monsoon trough extends from 16N97W to 08N109W. The ITCZ
extends from 08N109W to 04N124W to beyond 05N140W. Scattered 
moderate convection is noted within 60 nm either side of the ITCZ
between 117W and 127W. Scattered moderate isolated strong
convection was noted within 60 nm either side of the ITCZ west of
134W. 

...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Moderate to fresh winds prevail off the coast of the Baja 
California peninsula. Light to gentle winds prevail over the Gulf
of California. Gentle to moderate winds prevail elsewhere. Seas
are in the 7-8 ft range off the coast of Baja California Norte,
6-7 ft off the coast of Baja California Sur, 1-3 ft over the Gulf
of California, and 4-6 ft elsewhere. The northwesterly swell will
continue to subside, with seas falling below 8 ft west of Baja
California Norte Friday night. Otherwise winds and seas will
remain below advisory criteria. 

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

Gentle to moderate winds prevail over the offshore waters west of
Ecuador while light to gentle winds prevail elsewhere. Seas are
in the 5-7 ft range in southwest swell over the southern waters
and 4-6 ft over the northern waters. The southwesterly swell will
continue to propagate across the southern waters, with seas
building to 6-8 ft by Friday and continuing through the weekend
before diminishing below 8 ft by early next week. 

REMAINDER OF THE AREA... 

High pressure of 1029 mb, centered northwest of the area near 
35N140W, extends a ridge southeastward to near the Revillagigedo
Islands. The pressure gradient between the ridge and lower 
pressure in the vicinity of the ITCZ is maintaining moderate to 
fresh trades north of the ITCZ west of 120W. Seas in this trade- 
wind belt are in the 6-9 ft range in mixed northeast wind waves 
and northwest swell. High pressure will shift further from the
area through the weekend, loosening the pressure gradient over
the forecast area. Winds and seas will continue to decrease over
the area through this time. 

$$
AL