244 
AXPZ20 KNHC 220344
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
343 UTC Wed Aug 22 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 0000 UTC surface analysis and satellite imagery through
0330 UTC. 

...TROPICAL WAVES...

A tropical wave along 90W is moving W around 10 kt. No 
significant convection is evident over Pacific waters related to
this wave.

A tropical wave along 104W is moving W around 10-15 kt. 
Scattered moderate convection is from 10N to 13N between 100W 
and 107W.

A tropical wave along 121W is moving W around 10-15 kt. 
Scattered moderate convection is from 09N to 14N between 117W 
and 124W.

A tropical wave along 136W is moving W around 10-15 kt. 
Scattered moderate convection is from 12N to 16N between 135W 
and 140W.
   
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 

The monsoon trough extends from 08N78W to 13N104W to 12N135W.
Scattered moderate convection from 07N to 15N between 100W and
130W. For more information about convection see the tropical 
waves section.

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO... 

For the Gulf of Tehuantepec, high pressure north of the area and
lowering pressure farther south in the tropics is supporting
development of strong mainly overnight and early morning pulses 
through the Gulf of Tehuantepec starting tonight and reoccurring 
Wed night and Thu night, with minor pulses possible thereafter. 
Seas may build briefly to 9 ft during these pulses.

Elsewhere, ridging across the waters north of 20N will support
moderate to occasionally fresh winds funneling along the coast 
of Baja California through the next several days, with 3 to 5 ft 
seas, with highest seas off Baja California Norte. Gentle to 
moderate southerly flow will persist over the Gulf of California.

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

The monsoon trough will linger between 08N to 12N during the 
next few days. Winds on both sides of the trough axis will 
generally be light to moderate. The main exception to this will 
be over the Gulf of Papagayo, where moderate to fresh offshore 
winds will pulse to locally strong each night. Seas are expected 
to remain 6-7 ft downstream of Papagayo during this time.

REMAINDER OF THE AREA...   

Elsewhere, the pressure gradient between ridging across the 
northern waters and the ITCZ will support gentle to moderate 
trades and 4-7 ft seas in mixed swell north of the ITCZ and west
of 120W through the weekend.

Sea heights will be relatively low for most of the forecast area 
this week. Robust long period swell could arrive from the 
Southern Hemisphere toward the end of this week and cause seas 
near the Equator to begin building over the weekend.
  
$$
Christensen