000
AXPZ20 KNHC 250310
TWDEP 

Tropical Weather Discussion 
NWS National Hurricane Center Miami FL
0405 UTC Fri May 25 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 
0300 UTC.  
  
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 

The monsoon trough extends west from Panama near 09N79W across 
Costa Rica to 11N87W to 10N104W, then dips southwest to 07N116W, 
where scatterometer winds indicate a transition to an ITCZ which 
continues northwest to 11N130W then west-southwest to 09N140W. A 
surface trough is analyzed from 15N130W to 09N132W. Scattered 
moderate isolated strong convection is noted within 150 nm north 
of the trough axis between 104W and 115W.

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Weak high pressure is centered near 26N123W. A ridge extending 
from high pressure centered in the north-central Pacific near 
35N150W will gradually expand east-southeastward to near the 
southern tip of Baja California through Sat. This will tighten 
the pressure gradient over the waters west of the Baja peninsula 
and support fresh to locally strong NW winds this weekend. Seas 
are forecast to build to 5 to 8 ft by Sun morning.
  
Gulf of California: A fresh to locally strong W to SW breeze is 
expected N of 29N on Fri evening as a weak surface low moves 
eastward across the northern gulf waters. Gentle to moderate NW 
winds will prevail across the central and southern Gulf through 
early Sat.

Gulf of Tehuantepec: Moderate to locally fresh nocturnal drainage 
flow is expected through early Sat.
  
OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND 
WITHIN 750 NM OF ECUADOR... 

Gentle to moderate south to southwest winds are expected through 
Tue night, with seas generally 3 to 6 ft throughout this period.
 
REMAINDER OF THE AREA...
   
A weakening cold front extends from 30N129W to near 24N140W with 
a weak surface low evident on the front near 31N131W. The front 
will lose identity as it tracks slowly eastward through early 
Sat. NW swell associated with the front will maintain an area of 
6-8 ft seas across waters from 29N to 32N through Fri afternoon. 

The pressure gradient will tighten tonight as a surface low 
develops along a trough north of the ITCZ near 132W, producing 
fresh trades within 480 nm north of the low with seas building 
to 7-8 ft. The low will drift west and slowly dissipate near 
10N135W this weekend.
  
$$
Mundell