[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 132309
TWDAT

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0005 UTC Tue Oct 13 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 1800 UTC surface analysis and satellite imagery through
2300 UTC.

...TROPICAL WAVES...

An Atlantic tropical wave has an axis along 18W from 00N-17N,
moving W at 10 kt. Scattered moderate convection is along the
wave from 04N-16N and east of 21W.

An Atlantic tropical wave has an axis along 43W from 02N-15N,
moving W at 10-15 kt. Scattered moderate convection is noted
from 09N-13N between 36W-42W.

An Atlantic tropical wave has an axis along 55W from 05N-20N,
moving W at 10 kt. A 1010 mb low is along the wave near 14N55W.
Scattered moderate convection is just to the east of the low
from 11N-22N between 47W-55W. Seas are up to 11 ft near the low.
Upper-level winds are gradually becoming less conducive, so only
some slight development is possible today while the system moves
westward. By tonight, upper-level winds are expected to become
even less favorable for tropical cyclone formation to occur. This
system has a low chance of development through the next 48 hours
and the next 5 days. Please read the latest NHC Tropical Weather
Outlook at www.nhc.noaa.gov/text/MIATWOAT.shtml for more
details.

A west Caribbean tropical wave has an axis along 80W from 20N
southward, moving W at 10-15 kt. Scattered showers are noted
south of 20N and west of 80W. Another area of scattered moderate
convection is noted over the southern portion of the wave,
mainly where the wave meets the monsoon trough south of 13N.

...MONSOON TROUGH/ITCZ...

The monsoon trough extends off the African coast near 14N17W to
06N32W. The ITCZ continues from 06N32W to 07N42W, then resumes
near 07N44W to 04N51W. Scattered showers are from 01N-09N
between 11W-31W.

GULF OF MEXICO...

A cold front is pushing off the NW Gulf coast, stretching
from the central Louisiana coast near 30N88W to 27N97W. No
significant convection is associated with this front at this time.
A surface trough is analyzed over the Bay of Campeche from
24N97W to 18N94W. Scattered moderate convection is noted along
and west of the trough over the Mexican coast from 18N-24N and
west of 96W. High pressure is building across the northern Gulf.
Gentle to moderate NNE winds are behind the cold front, while
gentle winds prevail across the rest of the basin with calm
seas.

High pressure will prevail across the Gulf waters
through Thu. The cold front will stall this evening before
dissipating tonight. A second cold front will enter the NW Gulf
early on Fri and extend from the Florida Big Bend to near
Tampico, Mexico Fri evening. The front will stall and weaken over
the SE Gulf Sat night. Fresh to strong NE winds are expected
behind the front through Sat evening.

CARIBBEAN SEA

Please refer to the Tropical Waves section above for information
on the west Caribbean tropical wave.

A surface trough is analyzed south of 17N along 70W. Scattered
showers are noted along the trough. The monsoon trough extends
across the SW Caribbean along 10N between 75W-83W enahncing
convection across the area. Light to gentle trade winds prevail
across the basin with moderate trades north of Colombia. Seas
average 3-5 ft.

A tropical wave will bring moderate to fresh winds and building
seas to the tropical waters E of the Lesser Antilles through Wed,
and to the eastern half of the Caribbean Thu through Sat night.
Moderate trade winds over the south-central Caribbean will
increase to fresh speeds Thu evening as high pressure establishes
N of the area. These winds will prevail through the weekend,
increasing to strong in the Gulf of Venezuela at night.

ATLANTIC OCEAN

Please refer to the Tropical Waves section for information on
the Atlantic tropical waves.

A surface trough off the Florida coast in the western Atlantic
extends from 31N75W to 29N77W. To the east, another surface
trough extends from 31N72W to 25N76W. Scattered showers are
noted along this trough.

A surface trough in the west-central Atlantic is analyzed from
30N57W to 28N66W. Another trough is analyzed from 31N42W to
25N43W with scattered showers. This activity is enhanced by a
diffluent flow aloft. A 1014 mb low is analyzed near 30N26W,
with a trough extending southeast of the low to a 1012 mb low
near 23N17W. Light to gentle winds prevail across the basin with
seas averaging between 3-6 ft.

The trough extending across the central Bahamas will dissipate
tonight. A cold front will move off the SE coast of the United
States Fri evening and extend from 31N69W to near South Florida
Sat evening. Fresh to strong NNE winds and building seas will
follow the front and will affect the waters N of 27N over the
weekend.

$$
ERA
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