Tropical Weather Discussion
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
000
AXPZ20 KNHC 271521
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1605 UTC Mon Feb 27 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
1545 UTC.

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

No well defined Monsoon Trough/ITCZ. Scattered moderate
convection within 45-60 NM either side of line 03N120W to
03N127W.

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Weak high pressure is settling over the region, supporting gentle
to moderate breezes. Seas are 1 to 3 ft over the Gulf of
California and 3 to 5 ft elsewhere offshore. The high pressure
will dissipate through late today ahead of a cold front
approaching the area from the west. Strong southwest to west
winds are expected over the far northern Gulf of California
ahead of the cold front tonight into Tuesday. The front will
move across Baja California Norte and the northern Gulf of
California through late Tuesday, then become diffuse. Northwest
swell will follow the front, with seas to 8 ft reaching the
waters beyond 200 nm off Baja California Norte Wednesday, then
subsiding. Looking ahead, high pressure building north of the
area over the Great Basin will support strong northwest winds
down the length of the Gulf of California Wednesday night into
Friday.

Farther south, varying winds at 10 kt or less generally prevail
all the way to the Gulf of Tehuantepec. Little change is
expected through Tuesday. Looking ahead, a cold front will sweep
through the southwest Gulf of Mexico by Thursday and funnel
strong gap winds into the Gulf of Tehuantepec. Gale force winds
will be possible Thursday night through Saturday morning.

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

Strong gap winds are developing through the Gulf of Papagayo this
morning, the result of slightly higher pressure building north of
the area. The gap winds will diminish this afternoon, but are
expected to pulse again tonight and each night across the Gulf of
Papagayo through the remainder of the week, along with gap winds
off Puerto Corinto Nicaragua. The combined strong areas of gap
winds will allow seas of 8 ft downstream within 200 nm of the
coast each night. Fresh gap winds will also develop each night
through the Gulfs of Panama and Fonseca. Elsewhere, light to
gentle breezes will persist.

REMAINDER OF THE AREA...

A cold front extends from 30N125W TO 25N130W. Winds and seas are
moderate near the front, but long period northwest swell of 8 to
10 ft was observed in earlier altimeter data well west of the
front, north of 25N and west of 135W. The front will continue to
move east reaching the coast of Baja California Norte Tuesday.
Farther south, a surface trough extends from 11N113W to 04N116W
will continue to move west through the next couple of days
accompanied by a few showers and thunderstorms, eventually
reaching 120W to 125W by mid week before dampening out. High
pressure building north of the area behind the cold front will
allow northeast winds to increase slightly across the region
north of 05N and west of 120W by late Tuesday. Along with the
ongoing components of northwest swell propagating into the
region, seas will build to 8 to 10 ft over much of the area by
mid week.

$$
COBB



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.