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Atlantic Tropical Weather Discussion (Text)



000
AXNT20 KNHC 271746
TWDAT 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1246 PM EST Thu Feb 27 2020

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 1200 UTC surface analysis and satellite imagery through
1720 UTC.

...HEAVY RAINFALL POTENTIAL IN NORTHERN HONDURAS...

A strong cold front is moving across the NW Caribbean Sea and
has stalled in the Gulf of Honduras. Heavy rainfall has developed
ahead of the front in northern Honduras and is expected to 
continue through Saturday. Persistent heavy rainfall could lead to
significant flash floods and mudslides. Locally heavy rainfall is
also expected today in north central Guatemala, the southeastern 
parts of the Mexican state of Veracruz, and northern Chiapas. 
Please monitor the latest forecasts from your local or national 
meteorological service.

...MONSOON TROUGH/ITCZ... 

The monsoon trough passes through the coastal areas of Sierra 
Leone near 07N12W to 05N16W. The ITCZ continues from 05N16W to 
01N23W to 02S32W. Numerous strong convection is seen along and 
south of the ITCZ from 05S-01N between 23W-30W. Scattered moderate
convection is noted from 06S-04N between 18W-38W. Isolated
thunderstorms are moving off the coast of Liberia and Cote
d'Ivoire. 

GULF OF MEXICO...

High pressure is building across the Gulf of Mexico behind the 
cold front that is now well into the Atlantic and Caribbean. 
Overcast skies cover most of the Gulf with isolated showers moving
in the southeast Gulf toward southern Florida. Skies are clearing 
along the central and western Gulf coast. The latest scatterometer
data depicts fresh northerly winds across most of the basin, with
moderate northerly winds in the NW Gulf. Seas of 6 to 10 ft are 
seen across the eastern and southern Gulf with 1 to 3 ft along the
western and central Gulf coast. 

Hazardous seas will gradually subside from N to S today with 
tranquil conditions prevailing by Fri. A weak reinforcing cold 
front will sweep through the NE Gulf Fri night and bring fresh NW 
winds. High pressure will shift east of the Gulf Sun with fresh 
return flow increasing to strong over much of the Gulf early next 
week.

CARIBBEAN SEA...

A mid to upper-level ridge is over most of the basin, with a mid
to upper-level trough digging across the NW Caribbean. At the
surface, a cold front extends off the central coast of Cuba near
22N79W to 19N85W. The tail-end of the front stalls from 19N85W to
NW Honduras near 16N88W. A 1018 mb low is noted north of Honduras
near 17N85W with a trough along the low from 17N83W to 16N87W. An
area of thunderstorms is occurring in northern Honduras and
portions of the southern Gulf of Honduras and has been persistent
throughout this morning. Showers are also seen along the front. 
Elsewhere, showers are moving quickly across the Lesser Antilles 
and the eastern basin. A trough is noted east of the Lesser 
Antilles from 18N60W to 12N59W with showers along this feature. 

The latest scatterometer data depicts strong to near gale force
northern winds behind the cold/stationary front in the NW
Caribbean and Gulf of Honduras. Light winds are ahead of the front
in the western Caribbean. Strong trades are north of Colombia and
moderate trades across the central and eastern Caribbean. Seas up
to 9 ft are noted along and behind the front with 3 to 6 ft
elsewhere. 

The cold front will move SE and reach from E Cuba into E Honduras
by this evening, then slow and stall this weekend from Hispaniola
to near the Nicaragua-Costa Rica border, and dissipate by early 
next week. Strong N winds will prevail behind the front as high 
pressure builds into the region with the highest winds near the 
Central American coast. NE winds may reach near gale force in the
Windward Passage Mon and Mon night. Otherwise, moderate to fresh 
tradewinds will prevail east of the front through early Fri. 
Strong winds will return to offshore Colombia waters Fri night 
through early next week.

ATLANTIC OCEAN...

A cold front continues to push south and east across the western
Atlantic from 31N71W to the central Bahamas near 24N76W to central
Cuba near 22N78W. A secondary cold front is analyzed from 31N74W 
to the northern Bahamas near 27N77W to northwest Cuba near 23N81W.
Showers are within 60 nm of each front. A dying stationary front 
is in the central Atlantic from 30N42W to 19N59W with a 1019 mb 
low along the front near 23N50W. 

In the central Atlantic, a mid-level low is near 25N38W with a 
trough extending to the NE South American coast. At the surface, 
a 1018 mb low is near 22N41W with a trough along the low from 
30N37W to 19N44W. Showers with isolated thunderstorms are near 
this feature from 21N-29N between 27W-40W. Another trough is seen 
from 21N31W to 09N25W. Thunderstorms are noted near this trough 
from 15N-21N between 29W-33W. A 1011 mb low is off the Guinea- 
Bissau coast near 12N17W with a trough along it from 12N20W to 
11N15W. 

The latest scatterometer data depicts strong to near gale force NW 
winds behind the secondary front in the western Atlantic. Strong
westerly winds are noted behind the primary front with fresh
southerly winds ahead of it N of 29N. Seas in the western Atlantic
are 5 to 9 ft. 

The cold front will reach Bermuda to E Cuba by the evening, then 
slowing and gradually stalling into the weekend over the SE waters
and Hispaniola. A secondary surge of high pressure and reinforcing
cold front will likely sweep across northern areas Fri through 
Sat night and bring another round of strong W to NW winds. 
Improving conditions are expected for the start of next week. 

$$ 
AReinhart

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Page last modified: Thursday, 27-Feb-2020 17:46:39 UTC