000
AXPZ20 KNHC 050315
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0405 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 0000 UTC surface analysis and satellite imagery through 
0300 UTC.

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

A surface trough extends westward from 09N78W across Panama to 
10N85W, then SW to 02N104W. The ITCZ continues from there from 
05N124W to 06N140W. No significant convection.

...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. Little change in marine conditions 
is expected into Thu morning. An mid-upper level disturbance 
will shift eastward across the region on Thu, bringing moderate 
to locally fresh NW-N winds and 5-8 ft seas mainly in the waters 
N of Cabo San Lazaro as ridging builds behind this disturbance.

Farther south, high pressure in the SW Gulf of Mexico behind a 
cold front will support a brief period of strong gap winds in 
the Gulf of Tehuantepec overnight, with N winds in excess of 25 
kt and max seas building to 7-8 ft early Thu. A weak pressure 
pattern elsewhere will transition to a normal trade wind regime 
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 on Thu as high 
pressure builds north of the region, with seas increasing to 4-6 
ft. Gentle 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 1021 mb high pressure located near 29N127W. 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 later this week.

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 32N134W to 27N140W Fri 
night, from 32N125W to 25N140W on Sat, then dissipate from 
32N119W to 25N140W by Sat night.

$$
Mundell