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Atlantic Tropical Weather Discussion

AXNT20 KNHC 232318

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0005 UTC Fri May 24 2024

Tropical Weather Discussion for North America, Central America
Gulf of Mexico, 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 1800 UTC surface analysis and satellite imagery through 
2300 UTC.


Significant Rainfall in the Caribbean: A deep-layered trough 
currently extending from the western Atlantic well offshore of
North Carolina S-SW across central Cuba to Costa Rica is 
promoting unstable atmospheric conditions from Colombia north and 
northeastward across the Caribbean and western Atlantic between 
75W and 60W. This feature will lift slowly northeastward and into
the Atlantic this afternoon through early Sat, and will combine 
with abundant tropical moisture to support widespread deep 
convection across eastern Cuba, Hispaniola, Puerto Rico and the
Virgin Islands through late Fri. The latest model guidance 
suggests the highest rainfall accumulations will occur across 
southern Hispaniola through Friday. Residents in the above 
locations should remain alert for significant rainfall and 
potential flash flooding. Please refer to your local weather 
office for more specific information.


A tropical wave is located along 47W, from 13N southward and 
moving westward at 15 kt. Scattered moderate to isolated strong 
convection is seen from 01.5N to 11N between 43W and 51W. 


A monsoon trough enters the Atlantic along the Senegal coast near
12N16W, then curves southwestward across 08N19W to 07N19W. The 
ITCZ continues westward from 05N23W to 05N42W. Scattered moderate
to isolated strong convection is from 01N to 09N between 25W and 


Stable atmospheric conditions generally prevail across the Gulf.
A broad surface ridge persists from the southeastern U.S. 
southwestward to the central Gulf. Smoke and haze produced by 
agricultural fires in Mexico is lingering over the western and 
central Gulf. Latest observations indicate reduced visibilities of
4 to 6 nm mainly across the western Gulf. Moderate with locally 
fresh E to SE winds and seas at 4 to 6 ft are seen over the western
and south-central Gulf. Gentle to moderate E to SE winds and 2 to
4 ft seas prevail across the rest of the Gulf.

For the forecast, hazy conditions due to agricultural fires in 
Mexico will continue across all but NE portions of the Gulf 
through tonight. High pressure will remain NE of the basin through
the end of the week, producing moderate to locally fresh E to SE 
winds across the waters W of 90W, and gentle to moderate winds E 
of 90W. Winds will become SE to S basin-wide tonight through Mon. 


Please read the Special Features section about a Significant 
Rainfall Event. 

A pronounced mid to upper-level trough extends from the western
Atlantic well offshore of North Carolina south southwestward
across the northwest Bahamas, and across central Cuba to Costa
Rica is providing a broad zone of lift and upper divergent flow 
across the central basin. Together with a surface trough through
eastern Cuba focusing abundant moisture across the central basin,
isolated to scattered showers and thunderstorms are occurring 
from Colombia and western Venezuela, north and northeastward 
across the Caribbean between eastern Cuba and the Windward 
Passage. Moderate with locally fresh E to ESE winds and seas of 4 
to 6 ft are present across the basin E of 74W, except for seas 5 
to 7 ft across the waters south of Haiti. Moderate to locally
fresh winds are across the Gulf of Honduras and between Jamaica 
and eastern Cuba. Gentle E to SE winds and 2 to 4 ft seas prevail 

Smoke due to agricultural fires in Central America persists 
across the Gulf of Honduras, and offshore from Nicaragua and Costa
Rica. Latest observations reveal reduced visibilities of 4 to 6 

For the forecast, a strong deep-layered trough will support 
active weather across the central portions of the basin, which 
will gradually shift NE and into the Atlc through Fri night. A 
broad and weak trough will prevail across the north-central 
Caribbean tonight through Sat, yielding moderate trade winds 
across the E portions and moderate to fresh winds across NW 
portions of the basin. Smoke due to agricultural fires in Central 
America continues across the Gulf of Honduras, and spreads NW to 
the Yucatan coast.


A sharp deep-layered trough extends from well offshore of North
Carolina south-southwestward across the NW Bahamas, central Cuba 
and to the SW Caribbean. Broad scale lift induced by this feature 
and strong divergent flow aloft to the east of the trough axis are
coupling with modest convergent southerly surface winds near a 
surface trough over the NW Bahamas to generate scattered moderate 
isolated strong convection from the northern Caribbean across the 
Greater Antilles to the Atlantic, S of 29N between 60W and 76W. 
The heaviest rainfall in recent hours has been occurring across 
the eastern Bahamas and adjacent Atlantic waters to the north and 

A weak surface trough enters our waters near 31N33W to 27N43W. 
No significant convection is noted with this feature. A broad and
weak surface ridge is anchored by a 1021 high center near 26N36W,
and is supporting gentle anticyclonic winds and seas of 4 to 6 ft
north of 23.5N between 35W and 74W. NW of the trough across the 
NW Bahamas, gentle NE winds prevail with seas of 2 to 4 ft. South 
of 23.5N between 64.5W and 72W winds are fresh to locally strong 
with seas 5 to 8 ft. Farther east, moderate to locally fresh NE 
to E winds with seas 5 to 8 ft. With the exception of seas to 9 ft
between the Cape Verde Islands and the W coast of Africa.

For the forecast W of 55W, the surface trough over the Bahamas will
weaken and dissipate through Fri. A second surface trough 
extending through the Windward Passage, across the SE Bahamas to 
25N67W will drift eastward through Sat. Weak low pressure is 
expected to develop along the trough just N of Hispaniola tonight 
and shift N-NE through Sat, moving N of 31N Sat night. The low 
will be accompanied by fresh to locally strong winds and active 
weather Fri through Sat.