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Eastern North Pacific Tropical Weather Discussion (Text)



000
AXPZ20 KNHC 301506
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1433 UTC Sun Apr 30 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... 

A surface trough extends from 09N84W TO 10N90W TO 10N98W to
06N106W. The ITCZ extends from 06N106W to 03N112W to 03N131W to 
01N140W. Scattered moderate isolated strong convection was noted
from 03N to 10N east of 88W. Scattered moderate isolated strong 
convection was noted within 90 nm north and 30 nm south of the 
trough between 97W and 105W. Scattered moderate isolated strong 
convection was noted within 120 nm north and 30 nm south of the 
ITCZ between 111W and 126W. 

...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Latest surface observations indicate gentle to moderate winds
off the coast of Baja California Norte with light to gentle winds
elsewhere. Seas are in the 6-7 ft range west of the Baja
California peninsula, 5-7 ft off the remainder of the coast of
Mexico, and 1-3 ft over the Gulf of California. Light to gentle
winds will prevail over the Gulf of California while gentle to 
moderate winds will prevail over the remainder of the forecast
waters through Thursday. Winds will strengthen over the Gulf of
Tehuantepec Thu night, bringing a start to the next expected gale
force gap wind event expected to begin on Friday. 

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

Active convection will continue over the region generally south 
of 11N, including over the coastal sections through early this 
week. This persistent thunderstorm activity may cause localized 
flooding and mudslides over prone areas. Mainly light to gentle 
winds are expected through Thursday. Long period southwest swell
with seas in the 5 to 7 ft range will persist over the southern 
waters through Thursday. 

REMAINDER OF THE AREA...

High pressure of 1030 mb centered north of the area near 36N135W
extends a ridge southeastward to near 21N116W. The pressure
gradient between this area of high pressure and lower pressure in
the vicinity of the ITCZ is supporting gentle to moderate winds
north of the ITCZ. An area of seas reaching 9 ft in mixed
northwest and southwest swell prevails north of 18N between 120W
and 130W. Elsewhere seas are in the 5-7 ft range. Seas will
subside below 8 ft over the northern waters by midweek. Cross
equatorial southwesterly swell will bring seas to 8 ft over the
far southern waters south of 02N between 110W and 120W through
Monday before subsiding below 8 ft Tuesday. Elsewhere winds and 
seas will remain below advisory criteria. 

$$
AL

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Page last modified: Sunday, 30-Apr-2017 15:06:30 UTC