000
AXPZ20 KNHC 030901
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
504 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 0600 UTC surface analysis and satellite imagery through
0900 UTC.

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

The ITCZ extends from 05N93W to 05N120W to 03N140W. No 
significant convection is noted within the ITCZ at this time. 

...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

High pressure of 1029 mb, centered northwest of the area near 
36N136W, extends a ridge southeastward to near the Revillagigedo
Islands. Overnight ASCAT pass depicts gentle to moderate winds 
off the west coast of the Baja California peninsula, with light 
to gentle winds prevailing elsewhere over the forecast waters. 
Northwesterly swell has propagated into the waters off the 
western Baja California Norte, with seas in the 8-10 ft range. 
Seas are in the 5-7 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 below 8 ft over this area by 
midweek. High pressure will build across eastern Mexico midweek 
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. 

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

Winds will pulse 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 increase winds funneling into the Gulf of 
Papagayo 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 prevails 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 are between 9 and 13 ft primarily in 
northwesterly swell. The seas over the northern waters will 
gradually subside through Wednesday. Another set of 
northwesterly swell will build to near and 11 ft over the
northern waters midweek. Another set of large long period
northwesterly swells will reach the northwest waters the end of
the week. Seas will peak near 14 ft on Friday. 

$$
AL