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 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
AXPZ20 KNHC 210230
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
048 UTC Sun Apr 21 2019

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 0000 UTC surface analysis and satellite imagery through
0140 UTC.

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

A trough extends from 07N84W to 06.5N93W to 07N98W. The ITCZ
continues from 07N98W TO 06N102W TO 08.5N111W to beyond
04.5N140W. Scattered moderate and isolated strong convection is
noted within 60 nm either side of a line from 04N80W to 08N87W,
within 60 nm either side of a line from 05N108W to 12N112W and
from 05N to 10N between 118W and 126W.

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A broad ridge continues to reside over the offshore forecast
waters of Baja California, while a surface trough still runs
along the length of the Baja California peninsula this evening.
The pressure gradient between the high and troughing over Baja
supports moderate to locally fresh NW winds N of Punta Eugenia
and gentle to moderate winds between Cabo San Lucas and Punta
Eugenia. Seas are currently running between 5 and 7 ft. Moderate
to fresh NW winds will continue to affect the waters N of Punta
Eugenia, with seas building to around 8 ft in NW swell in the far
northern waters Sun through Mon night. Elsewhere, mainly gentle
to moderate NW to N winds and seas of 5 to 7 ft are expected
through Wed night.

Gulf of California: Winds will briefly increase across the
northern part of the Gulf this evening. At that time, expect SW
to W winds of 20 to 25 kt and seas building to as high as 5 ft
between 29.5N and 30.5N. Otherwise, light to gentle winds can be
expected through Wed.

Gulf of Tehuantepec: Winds diminished to near gale force earlier
this afternoon, and the area covered by strong winds or greater
continues to decrease. Seas generated by these winds have
produced an area of 8 ft or greater wave heights that extends SW
from the Gulf to near 08N101W. Winds are forecast to further
diminish to 20 to 25 kt by Sun morning, and then become variable
at 15 kt or less Sun night through Mon night. Light to gentle
onshore winds are expected Tue through Thu.

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

Gulf of Papagayo: Fresh to strong NE to E winds are forecast
across the Gulf of Papagayo and downwind to near 90W tonight
through Mon night, with seas building to 7-8 ft. Winds will be
strongest during the overnight and early morning hours with the
assistance of the nocturnal drainage flow. Moderate to fresh
winds are expected the remainder of the forecast period with
seas below 8 ft.

Gulf of Panama: Moderate to fresh northerly winds will briefly
affect the Gulf of Panama Sun night through Mon night, then
mainly gentle to moderate northerly winds will generally prevail
across this area, with seas in the 3 to 5 ft range in long period
SW swell.

Light to gentle winds will dominate the remainder of the offshore
forecast waters, with seas of 4 to 5 ft.

REMAINDER OF THE AREA...

A ridge extends SE across the forecast waters from 1030 mb high
pressure centered close to 34N139W to near the Revillagigedo
Islands. The pressure gradient between the ridge and lower
pressure in the vicinity of the ITCZ is supporting an area of
fresh to strong trade winds covering the waters from the ITCZ
northward to about 20N and W of 130W. The high will remain near
its current location but weaken Tue through Thu in response to
low pressure approaching from the west. This will allow the area
of fresh to strong winds and seas of 8 ft or higher to retreat to
the W of 140W by Tue night.

$$
CAM


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