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Eastern North Pacific Tropical Weather Discussion



000
AXPZ20 KNHC 280900
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1005 UTC Tue Mar 28 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... 

ITCZ axis extends from 05N89W to 02N105W. Scattered moderate 
isolated strong convection is within 30 nm either side of 
the axis between 90W and 97W.

...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

High pressure north of the area extends a ridge southeast to 
near the Revillagigedo Islands. The gradient between the ridge 
and lower pressure inland over Mexico is supporting fresh to 
strong NW winds west of Baja California Norte and moderate to 
fresh N-NW winds west of Baja California Sur. Gale force winds 
off the coast of southern California will generate large long 
period NW swell that will propagate into the waters off Baja 
California and peak near 13 ft Tuesday. The high pressure will 
remain nearly stationary over the next 48 hours. 

Light winds and seas prevail over the Gulf of California. As the 
high pressure builds eastward, NW winds will increase to 20-25 
kt in the northern Gulf of California later this morning, then 
spread southward into the central Gulf of California waters by 
tonight with seas building to 4-6 ft, then diminish Wednesday as 
the high weakens slightly. Light to gentle winds will prevail 
elsewhere through the week. 

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

Gap winds are not expected to be very significant the next few 
days across Central America. Light to gentle winds and 3-5 ft 
seas are expected to prevail over the forecast waters the next 
several days.

REMAINDER OF THE AREA...

High pressure of 1032 mb located north of area near 35N132W 
dominates the subtropical eastern Pacific. The pressure gradient 
between this high and the near-equatorial trough is supporting 
fresh to strong trades south of 21N and west of 125W. Seas over 
this area are in the 8-11 ft range in a mix of long period NW 
swell and NE wind waves. The aerial extent of the trades will 
peak this morning then diminish through Wednesday as the nearly 
high weakens slightly. Marine conditions over the forecast area 
will change little during the next 48 hours under the influence 
of this broad ridge.

$$
Mundell