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Atlantic Tropical Weather Discussion

AXNT20 KNHC 050535

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0605 UTC Fri Mar 5 2021

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 32N. The following information is based on satellite
imagery, weather observations, radar and meteorological analysis.

Based on 0000 UTC surface analysis and satellite imagery through 
0530 UTC.


The monsoon trough extends from the coast of Sierra Leone near 
07N12W to 02N20W. The ITCZ continues from 02N20W to 02N35W to 
00N39W. Scattered moderate isolated strong convection is noted 
from 00N-03N between 16W-40W.


A ridge centered on 1019 mb high pressure near 29N90W dominates 
the Gulf waters, supporting gentle to moderate anticyclonic 
winds and 2-3 ft seas across the basin. Some low clouds are 
noted over the far western Gulf between 20N and 26N, but no 
significant showers are evident from satellite imagery.

High pressure will prevail across the basin through Fri. A low 
pressure system is expected develop in the western Gulf early 
Fri, then deepen and move rapidly eastward across the Gulf 
through Sat. The low pressure will move E of the area by Sat 
night but the pressure gradient will continue to support fresh 
to strong NE-E winds over the eastern half of the Gulf on Sun, 
with seas building to 10 ft. 


A slow moving cold front is across the NW Caribbean from central 
Cuba to the Yucatan peninsula near 20N87W. No significant winds 
or showers are associated with the boundary. The front will 
reach from eastern Cuba to north of Belize  Fri morning, then 
stall and dissipate over the NW Caribbean waters Fri night and 
Sat. Scatterometer data shows fresh NE winds near the coast of 
Colombia, and gentle to moderate winds elsewhere across the 
region. Typical shallow moisture embedded in the trade wind flow 
is moving across the area, producing isolated passing showers.

The cold front will stall overnight then dissipate and lift 
north of the area through Fri evening. Fresh to occasionally 
strong winds will prevail in the southern Caribbean through Sun, 
with gentle to moderate winds expected elsewhere. A cold front 
is expected to move into the northwest Gulf Sat night and Sun, 
stall from the Windward Passage to Belize by Sun night, then 
dissipate Mon into Tue. Fresh to strong NE winds and building 
seas will follow the front over the western Caribbean. 


A cold front passes through 32N59W across the Bahamas to central 
Cuba near 22N78W. A narrow band of clouds and showers is noted 
ahead of the front north of 23N. The front will extend from 
32N55W to eastern Cuba on Fri, then stall and drift northward 
Fri night and Sat as a low pressure moves from the Gulf of 
Mexico into the SW N Atlantic. 

The remainder of the Atlantic forecast waters is under the 
influence of a 1029 mb high pressure located near the Azores. 
The associated ridge covers the waters between the Canary 
Islands and the NE Caribbean. Strong westerly winds are 
transporting upper level moisture from the deep tropics near 
South America to western Africa, including the Cabo Verde 

The cold front will weaken and stall from 24N65W to eastern Cuba 
on Fri. Northerly winds will follow the front through Fri, then 
shift from the east Sat, increasing north of 27N Sat night. A 
developing low pressure system will move rapidly from central 
Florida to Bermuda Sat night and Sun, possibly accompanied by 
strong to near-gale force winds, and dragging a cold front 
across the region through early next week. High pressure will 
build north of 27N by Mon, supporting strong NE winds south of 
27N through Tue.