000
AXPZ20 KNHC 021545
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1545 UTC Mon Apr 2 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... 

A surface trough extends from 08N84W to 03N100W. The
intertropical convergence zone continues from 03N100W to beyond
07N140W. Scattered moderate convection is noted from 07N to 08N
between 115W and 125W. As it is normal for this time of the 
year, a second ITCZ axis is observed south of the Equator, 
extending from 04S90W to 05S110W to 05S110W to 02S140W. No 
significant convection is noted.

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Ridging extends from 1023 mb high pressure centered north of the
area near 37N135W southeastward through the Revillagigedo
Islands. This is maintaining a fairly weak pressure field and
thus moderate northwesterly flow through the waters off Mexico
through the Gulf of Tehuantepec. Seas are 3 to 5 ft in open
waters, as noted in recent altimeter satellite passes. Light to
gentle winds and modest seas are noted through the Gulf of
California. The high pressure will build southward through mid
week. allowing the northwesterly winds off Baja California to
increase to moderate to fresh with seas building slightly. Fresh
to strong gap winds are possible through the Gulf of Tehuantepec
by early Thu as high pressure builds north of the region in the
Gulf of Mexico. 

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

Gulf of Papagayo: moderate to fresh NE-E winds are expected 
through Tue, and then again on Thu, with seas generally in the 
4-7 ft range. Gentle to moderate winds will prevail the remainder
of the forecast period.

Gulf of Panama: moderate to fresh N-NE winds will prevail through
tonight, with seas of 4-7 ft.

Elsewhere, gentle to moderate offshore flow is generally expected
N of 09N through Tue, while light and variable winds are forecast
S of 09N.

REMAINDER OF THE AREA... 

A broad ridge extends across the region north of 15N related to 
1023 mb high pressure located near 37N135W. This high pressure 
center build southward over the next 24-48 hours, reaching a 
position near 28N126W by this evening, then will remain nearly 
stationary over the northern forecast waters through Tue evening.
Under the influence of this system, a weak pressure pattern will
prevail over the forecast area. This will maintain mainly gentle
to moderate winds, with seas less than 8 ft through Tue night. 
Then, expect increasing winds and building seas across north of
25N and west of 135W Wed, ahead of a cold front approaching from
the west, accompanied by long period northwest swell to 9 ft
through mid week.

$$
Christensen