000
AXPZ20 KNHC 110903
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
559 UTC Wed Apr 11 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.

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

A surface trough extends from 09N84W to 05N93W to 04N110W. The 
ITCZ extends from 04N110W to 08N118W to 07N125W to 09N132W to 
07N140W. Scattered moderate isolated strong convection is noted 
within 120 nm south of the trough axis between 90W and 105W. 
Scattered moderate isolated strong convection was noted within 60
nm either side of the ITCZ between 120W and 125W.

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Fresh to strong winds are expected in the Gulf of Tehuantepec 
through Thu. Strong NW winds and large NW swell will move into 
the waters off Baja California Norte Thu. Strong winds are 
possible across the length of the Gulf of California Fri night 
into Sat. Gale force winds are possible in the Gulf of 
Tehuantepec Sunday. 

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

Light to gentle winds are expected during the forecast period. 
Seas in the 3 to 4 ft range will prevail, except south of 05N 
where southerly swell will maintain seas of 3 to 5 ft. Fresh gap 
winds are possible in the Gulf of Papagayo by mid week. 

REMAINDER OF THE AREA... 

The pressure gradient between lower pressure in the vicinity of
the ITCZ and a ridge of high pressure over the northern waters 
is producing mainly gentle to moderate trades north of the ITCZ 
to 20N. High pressure will further build Thu, increasing trades 
over this area. NW swell will propagate southeastward the next 
several days, with seas greater than 8 ft covering the waters 
north of a line from Baja California Norte to 08N140W by Thu. A 
second set of NW swell will move into the northern waters Thu 
night into Fri, bringing seas to near 13 ft over the waters north
of 20N and west of 120W. Yet another NW swell will move into the
NW waters Sat, with seas possibly reaching to near 13 ft over 
the far NW waters.

$$
AL