000
AXPZ20 KNHC 050920
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1005 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 0600 UTC surface analysis and satellite imagery through 
0900 UTC.

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

A surface trough extends west-southwestward from 10N84W to 
02N104W. The ITCZ continues westward from there to 02N116W to 
05N124W to 06N140W. No significant convection is noted.

...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. An mid-upper level disturbance 
will shift eastward across the region later today, 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 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 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 today 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 28N127W. 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