000
AXPZ20 KNHC 030308
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0405 UTC Tue Apr 3 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... 

A surface trough extends from 08N81W to 06N90W to 05N100W. The 
Intertropical Convergence Zone continues from 05N100W to 07N120W
to 06N130W to 07N140W. Scattered moderate convection is noted 
from 05N to 07N between 86W and 90W, from 07N to 09N between 118W
and 121W, from 10N to 12N between 126W and 132W, and from 07N to
10N between 135W and 138W. As it is normal for this time of the 
year, a second ITCZ axis is observed south of the Equator, 
extending from 06S87W to 03S96W to 06S110W to 04S116. Isolated 
moderate convection is from 04S to 07S between 110W and 114W. 

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A ridge extends SE across the offshore forecast waters through 
the Revillagigedo Islands. This is maintaining a fairly weak 
pressure field and thus gentle to moderate northwesterly flow 
across the waters W of Baja California Peninsula. 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 Wed night into 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 early 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 dominates the forecast region north of 15N and W of
110W related to 1024 mb high pressure located well N of the area 
near 44N130W. This high pressure center will build southward 
over the next 24-48 hours, then remain nearly stationary over 
the northern forecast waters through mid week. 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 the far NW
waters on Wed, ahead of a cold front approaching from the west.
Expect fresh to strong southerly winds and seas of 8-9 ft ahead
of the front and NW of a line from 30N136W TO 27N140W by late 
Wed.

$$
GR