000
AXPZ20 KNHC 051536
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1535 UTC Thu Apr 5 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
1430 UTC.

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

A surface trough extends west-southwestward from 09N83W to 
04N101W. The ITCZ continues westward from there to 04N120W to
beyond 04N140W. Scattered moderate convection is from 09N to 12N
between 111W and 117W, and within 150 nm S of the surface 
trough. Isolated moderate convection is from 04N to 10N W of 
132W. 

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A weak ridge extends SE across the offshore forecast waters into 
the Revillagigedo Islands, maintaining mainly gentle to moderate 
NW winds and seas of 4-6 ft. A mid-upper level disturbance will 
shift eastward across the region later today, bringing moderate 
to locally fresh NW-N winds and 5-7 ft seas mainly in the waters 
N of Cabo San Lazaro tonight and Friday as ridging builds behind 
this disturbance. These winds will increase further to fresh to 
locally strong Fri night through Sun with seas increasing to 10 
ft along 30N.

Farther south, high pressure in the SW Gulf of Mexico behind a 
cold front is supporting a brief period of strong gap winds in 
the Gulf of Tehuantepec this morning, with N winds in excess of 
25 kt and max seas building to 7-8 ft. A weak pressure pattern 
elsewhere will transition to a typical trade wind regime, with
gentle to moderate NW to W winds and seas of 4-6 ft prevailing 
by Fri as high pressure builds north of the region.

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

Moderate NE to E winds in Papagayo will freshen this morning and
again Fri morning as high pressure builds north of the region, 
with seas increasing to 4-6 ft. Gentle to moderate winds will 
prevail elsewhere during the remainder of the forecast period.

REMAINDER OF THE AREA... 

A broad ridge dominates the waters north of 15N and W of 110W 
associated with 1022 mb high pressure located near 27N128W. The 
high is expected to remain nearly stationary during the next 24 
hours. The gradient between this ridge and lower pressures in 
the vicinity of the ITCZ will produce moderate to locally fresh 
trade winds and seas to 7 ft across the waters from 08N to 15N W 
of 125W today through the upcoming weekend.

A strong low pressure system moving N of the area will drag a 
cold front across the NW portion of the discussion area Fri 
night and Sat. The front will extend from 30N134W to 26N140W Fri
night, from 30N126W to 25N140W on Sat, then dissipate from 
32N119W to 25N140W by Sat night. Fresh to strong return flow 
is expected N of 27N W of 134W ahead of the front today through 
Fri, with seas building to 8 to 10 ft. Winds will decrease as the
front weakens. However a NW swell to 8 ft will linger N of 28N 
and W of 135W through the weekend. 

$$
Latto