000
AXPZ20 KNHC 181600
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1605 UTC Fri May 18 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 1200 UTC surface analysis and satellite imagery through 
1530 UTC. 
  
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 

The monsoon trough axis extends from 08N78W to 09N92W to 11N99W 
to a 1010 MB low pressure near 10N121W to 06N133W. The 
intertropical convergence zone continues from 08N133W to beyond 
05N140W. Scattered moderate isolated strong convection is from 
05N to 11N between 91W and 110W. Scattered moderate convection 
is from 04N to 12N between 114W and 129W, and within 150 NM 
either side of the ITCZ.

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Moderate to fresh northwesterly winds persist off Baja California
between a 1025 mb high pressure centered west of the area and 
lower pressure over northwest Mexico. Seas are 5 to 8 ft off 
Baja California with a component of SW swell, subsiding to less 
than 8 ft tonight. Moderate northwesterly winds will persist off 
the coast of Baja California thereafter through Wed. However, 
seas are forecast to build to 8 ft in long period SW swell off 
Baja California Mon morning continuing through Wed morning. 

For the Gulf of California, variable light to gentle winds with 
seas to 4 ft will dominate through Wed.

Light to gentle northerly flow with seas of 4-6 ft in SW swell 
is along the remainder of the coast of Mexico. Seas are forecast 
to increase to 8 ft Mon morning and subsiding Tue night. 
  
OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND 
WITHIN 750 NM OF ECUADOR... 

Gulf of Papagayo: Light to gentle winds will dominate the gulf 
the entire forecast period as weak pressure will prevail across 
Central America. Seas of 4-7 ft are forecast over the Gulf and 
nearby waters through Wed.

Gulf of Panama: Gentle to moderate S to SW winds are forecast 
through Wed with seas of 4-6 ft in long period SW swell, 
building to 5-7 ft on Mon as the swell reaches the coasts of 
Panama and Colombia. Expect big waves along those coasts.

Elsewhere, gentle to moderate SW winds are expected to the south 
of the monsoon trough with light to gentle variable winds north 
of trough as a weak pressure pattern remains over Central 
America. Seas of 6-7 ft in long period SW swell west of the 
Galapagos Islands are expected to propagate northward Sat 
through late Tue next week building to 8 ft Sat.

REMAINDER OF THE AREA...

A 1025 mb high is centered near 31N136W, with a ridge axis 
extending southeastward to west of the Revillagigedo Islands. In 
the tropics, a 1010 mb low pressure is centered along the 
monsoon trough near 10N121W. Gentle to moderate northerly winds 
are noted north of 20N west of 120W, with moderate to fresh 
trade winds south of 20N to the monsoon trough/ITCZ. The low 
pressure will drift westward and change little through the next 
couple of days. Otherwise, reinforcing SW swell in excess of 8 
ft will start to move into the region in the next the 24 hours.

$$
Ramos