000
AXPZ20 KNHC 031528
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1308 UTC Mon Apr 3 2017

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
1500 UTC.

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

The ITCZ extends from 05N92W to 03N100W to 03N112W to 04N118W to
03N140W. Scattered moderate convection is present from 06N to 08N
between 111W and 115W and from 04N to 06N between 127W and 131W.

...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A 1027 mb high is centered northwest of the area near 36N136W. 
The high ridges southeastward to near the Revillagigedo Islands
at 15N108W. Gentle to moderate NW winds are noted off the west 
coast of the Baja California peninsula, with light to gentle 
winds prevailing elsewhere over the forecast waters. 
NW swell continue to propagate into the waters west of Baja 
California Norte, with seas in the 8-10 ft range. Seas are in the
6-8 ft range off the west coast of Baja California Sur, 2 ft or 
less over the Gulf of California, and 4-6 ft elsewhere. The 
northwest swell will continue to propagate southeastward, with 
seas building to 8 ft or greater off the western coast of the 
entire Baja California peninsula by late tonight. Seas will then 
subside to below 8 ft in this area by midweek. High pressure 
will build on Wednesday night and Thursday across eastern Mexico
in the wake of a cold front over the Gulf of Mexico. This will 
increase winds funneling through the Chivela pass into the Gulf 
of Tehuantepec Thursday, with winds expected to increase to gale 
force Thursday night and Friday. 

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

NE to E winds will pulse to moderate speeds the next few nights 
over the Gulf of Papagayo. High pressure building in the wake of 
a cold front over the Gulf of Mexico will cause winds funneling 
into the Gulf of Papagayo to become fresh Thu and Fri. 
Otherwise...light to gentle winds and seas of 4 to 6 ft will 
prevail over the forecast waters.

REMAINDER OF THE AREA...

High pressure resides over the northern waters. The pressure 
gradient between this area of high pressure and the lower 
pressure in the vicinity of the ITCZ is supporting moderate to 
fresh tradewinds north of the ITCZ and west of 125W. Seas within 
this area are in the 7 to 9 ft range as long period northwest 
swell mixes with shorter period northeasterly wind waves. Seas 
over the northern waters measure between 9 and 12 ft; primarily 
in northwesterly swell. The seas over the northern waters will 
gradually subside through Wednesday. Another set of northwesterly
swell will cause seas in the northern waters to build to around 
11 ft over the northern waters Wednesday night through Friday. 
Another set of large long period northwesterly swell will quickly
follow into the northwest waters the end of the week. Seas will 
peak near 13 ft on Saturday. 

$$
cam