969
AXPZ20 KNHC 241728
TWDEP
Tropical Weather Discussion...Update
NWS National Hurricane Center Miami FL
1605 UTC Wed Apr 24 2024
Tropical Weather Discussion for the eastern Pacific Ocean from
03.4S to 30N, east of 120W including the Gulf of California, and
from the Equator to 30N, between 120W and 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
1530 UTC.
Updated Offshore Waters and Remainder of Area sections
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
An equatorial trough extends westward from the coastal border of
Panama and Colombia to 07N92W. An ITCZ continues from 07N92W
across 07N115W to beyond 05N140W. Scattered moderate convection
is occurring up to 130 nm along either side of the trough, and up
to 200 nm along either side of the ITCZ. This area includes the
offshore waters of Costa Rica, Panama and northwestern Colombia.
...OFFSHORE WATERS WITHIN 250 NM OF MEXICO...
A surface ridge extends southeastward from a 1027 mb high near
32N145W to near the Revillagigedo Islands. The pressure gradient
between the ridge and a trough over the Gulf of California is
gentle to moderate northerly winds and seas of 4 to 6 ft west of
Baja California and near the Revillagigedo Islands. Moderate with
locally fresh southerly winds and 3 to 5 ft seas exist at the
northern Gulf of California. Light to gentle winds and seas at 1
to 3 ft prevail elsewhere in the Gulf of California. Moderate to
fresh northerly winds with 5 to 6 ft seas are present at the
Gulf of Tehuantepec. Mainly gentle N to ENE winds and seas of 4
to 6 ft are present across the rest of the offshore waters along
central and southern Mexico.
For the forecast, moderate to fresh southerly winds in the
northern Gulf of California will pulse to between fresh and
strong this evening through early Thu morning, and again Fri
evening through early Sat morning. Starting Thu, strong high
pressure over the East Pacific is going to build eastward toward
Baja California. This will cause gentle to moderate northerly
winds west of Baja California and near the Revillagigedo Islands
to become fresh to locally strong along with building seas by
Fri.
...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA,
AND WITHIN 750 NM OF ECUADOR
An upper-level trough is triggering widely scattered showers and
isolated thunderstorms at the offshore waters of Guatemala and El
Salvador. Refer to the ITCZ/Monsoon Trough section for additional
convection. Fresh with locally strong easterly winds and seas of
5 to 7 ft are in the Gulf of Papagayo region as indicated by
earlier satellite altimeter data. Moderate to fresh north winds
along with 4 to 6 ft seas are in the Gulf of Panama reaching
south to near 05N. Mainly gentle ENE to SE winds and seas at 4 to
6 ft in mixed moderate swells exist elsewhere over the Central
American offshore waters. Gentle with locally moderate southerly
winds and seas of 3 to 5 ft in long- period moderate southerly
swell continue offshore Ecuador and near the Galapagos Islands.
For the forecast, moderate NE to E winds at the Gulf of Papagayo
region will become fresh to strong this evening through Fri
morning. Gentle northerly winds at the Gulf of Panama will
increase to between moderate and fresh during this same time
period. Elsewhere, light to gentle winds along with moderate seas
will continue through the weekend.
...REMAINDER OF THE AREA...
A surface ridge extends southeastward from a 1027 mb high near
32N145W to near the Revillagigedo Islands. A surface trough
curves southwestward from a 1019 mb low at 29N127W to 27N130W.
Widely scattered showers are seen near these features north of
26N between 123W and 130W. Moderate to fresh N to NW winds with 6
to 8 ft seas are present west of the low, north of 28N between
125W and 129W as revealed by latest satellite altimeter data.
For the remaining area north of 20N and west of 120W, gentle to
moderate N to NE winds and seas at 5 to 6 ft exist. The pressure
gradient between the high pressure and lower pressure in the
vicinity of the ITCZ is supporting moderate to fresh trade winds
and seas at 6 to 8 ft from 09N to 20N west of 115W. Gentle to
moderate ENE to SSE winds and 5 to 6 ft seas are noted near the
ITCZ and equatorial trough. South of the ITCZ, gentle to moderate
E to SE winds along with seas of 4 to 6 ft in long-period,
moderate southerly swell prevail.
For the forecast, the trade winds from 09N to 21N are forecast
to become fresh to occasionally strong, along with 7 to 9 ft seas
by Thu evening as the surface ridge strengthens. The aforementioned
weak low pressure and related trough are forecast to move in a
general eastward motion through this afternoon, weakening into a
trough later this evening. Moderate to fresh N to NE winds and
seas at 5 to 7 ft are expected north of 21N and west of 120W by
Fri.
$$
Chan
