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HP2DFA > NHC 24.10.26 18:32l 107 Lines 4613 Bytes #300 (0) @ WW
BID : 5516_HP2DFA
Read: GUEST
Subj: NHC: TROPICAL WEATHER DISCUSSION (23-Oct 05:00Z)
Path: IZ3LSV<IK6IHL<IK7NXU<HB9ON<DK0WUE<PD0LPM<VE3CGR<KB5YZB<W0ARP<HP2DFA
Sent: 261023/0957Z 5516@HP2DFA.#COL.PAN.CEAM BPQ6.0.24
000
AXNT20 KNHC 230950
TWDAT
Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1215 UTC Fri Oct 23 2026
Tropical Weather Discussion for North America, Central America
Gulf of America, Caribbean Sea, northern sections of South
America, and Atlantic Ocean to the African coast from the
Equator to 31N. The following information is based on satellite
imagery, weather observations, radar and meteorological analysis.
Based on <a href='https://www.nhc.noaa.gov/tafb/USA_06Z.gif'>0600 UT
0930 UTC.
...SPECIAL FEATURES...
Heavy Rainfall in the North Caribbean: A broad upper-level
trough extends from the United States into the NW Caribbean,
while deep moisture convergence is ongoing at lower levels in the
southern Caribbean. A broad plume of very moist air will interact
with the upper level trough in the NW Caribbean, sustaining
moisture into Hispaniola, Jamaica, Cuba, and the Bahamas over the
next several days. Low-level winds will also lead to moist onshore
flow entering along the southern coasts of east Cuba and Haiti,
where heavy precipitation is expected through Sunday. Expect the
heaviest precipitation to occur across all other aforementioned
areas on Sat and Sun. Heavy rainfall will raise concerns for
dangerous and life-threatening flash flooding.
Please refer to your local weather services and the International
Desk at the Weather Prediction Center for more information.
...MONSOON TROUGH/ITCZ...
The monsoon trough extends off the coast of Africa near 13N16W
and extends to 07N30W. The ITCZ extends from 07N35W to 05N52W.
Scattered moderate convection is noted from 08N to 11N between
17W and 20W.
...GULF OF AMERICA...
A tight gradient between 1020 mb high pressure off Louisiana and a
trough over the northwest Caribbean is supporting moderate to
fresh NE winds and 4-6 ft seas across the eastern Gulf this
morning. Light to gentle NE to E winds and 1-3 ft seas are noted
over the western Gulf.
For the forecast, a tightening pressure gradient between the high
pressure and a low pressure forecast to develop near the Bahamas
will bring fresh to strong NE winds and rough seas over the
eastern Gulf, including the Florida Straits, tonight through early
next week.
...CARIBBEAN SEA...
An upper level trough over NW Caribbean supports scattered to
numerous showers and thunderstorms over the north-central
Caribbean. A weak pressure gradient over the area is generating
moderate or weaker winds, and slight to moderate seas, over the
basin.
For the forecast, scattered to numerous showers and thunderstorms
over the north-central Caribbean and Windward Passage will
prevail through Sat. Meanwhile, a broad trough over the central
and western Caribbean will support light winds and slight to
moderate seas west of 75W through Sat, and moderate to fresh E to
SE winds and moderate seas east of 75W. Fresh N to NE winds
across the western Caribbean with building seas west of 80W are
expected by early next week as high pressure builds north of the
area. Expect rough seas and large swell across the Yucatan Channel
Mon and Tue. Little change is expected elsewhere.
...ATLANTIC OCEAN...
Scattered showers and thunderstorms are active east of the
northern Bahamas, and west of a trough reaching from 31N60W to
the central Bahamas. Gentle to moderate breezes persist east of
50W, although a tongue of large N swell continues to move into
the waters between 70W, with 7 to 9 ft wave heights. Waves are 5-7
ft elsewhere west of 560W. Scattered showers and thunderstorms
are active near another surface trough is noted along 50W north of
25N, and within 90 nm east of a trough along 32W from 10N to 18N.
Elsewhere, broad ridging centered on 1030 mb high pressure near
the Azores is maintaining fresh to strong SE to S winds and 6-8
ft seas north of 27N between 45W and 50W, and moderate to fresh E
winds and 5-7 ft seas elsewhere.
For the forecast west of 55W, large northerly swell will continue
to propagate across the forecast region W of 65W and NE of the
Bahamas through Fri. A tightening pressure gradient will develop
beginning late Fri as high pressure builds southward over the
western Atlantic and low pressure deepens near the Bahamas along a
trough or developing frontal boundary. This setup is expected to
induce widespread fresh to strong NE to E winds and rough to very
rough seas, with winds likely reaching gale-force over much of the
waters north of 27N and W of 60W Sat night through Sun night.
Mariners are urged to remain alert to these dangerous marine
conditions, and take the necessary precautions to avoid the
affected areas.
$$
Christensen
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