[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 090604
TWDAT

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0605 UTC Wed Dec 09 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 0000 UTC surface analysis and satellite imagery through
0540 UTC.

...MONSOON TROUGH/ITCZ...

The monsoon trough passes through the coastal border areas of
Sierra Leone and Guinea near 07N11W, to 06N14W. The ITCZ
continues from 06N14W, to 05N23W, 06N33W, to 05N44W. One surface
trough is along 15N42W 07N45W. A second surface trough is along
48W/49W from 01N to 09N. Precipitation: isolated to widely
scattered moderate and locally strong is from 19N southward from
56W eastward.

GULF OF MEXICO...

Broad upper level W wind flow spans the Gulf of Mexico.

The cold front has moved through the entire Gulf of Mexico
already. High pressure has been building into the Gulf of
Mexico, during the last few days. Broad surface anticyclonic
wind flow spans the entire Gulf of Mexico.

Northerly winds will diminish across the basin through
Wednesday, as high pressure builds across the
region. Southerly winds will increase in the western Gulf of
Mexico from Thursday night through Saturday. A cold front will
move into the NW Gulf of Mexico on Saturday night, and then
extend from northern Florida to southern Texas on Sunday night.

CARIBBEAN SEA...

A cold front passes through the Windward Passage, and it reaches
NE Nicaragua. Precipitation: isolated moderate is within 60 nm
on either side of the cold front.

Broad upper level anticyclonic wind flow covers the Caribbean
Sea.

The monsoon trough is along 08N/10N from 73W in N Colombia,
beyond Costa Rica. Precipitation: isolated moderate to locally
strong is from 13N southward from 72W westward to the coast of
the countries of Central America.

The current cold front, from the Windward Passage to northern
Nicaragua, will extend from Hispaniola to Costa Rica on
Wednesday night. The front will stall and weaken across the
western Caribbean Sea on Thursday. Strong northerly winds are
expected to the west of the front through Wednesday. Fresh
NE winds will prevail elsewhere in the NW Caribbean Sea through
Thursday.

ATLANTIC OCEAN...

A cold front passes through 32N59W to 22N70W, to the Windward
Passage, and into the Caribbean Sea to the NE coast of
Nicaragua. Precipitation: isolated to widely scattered moderate
and locally strong is within 180 nm to the east of the cold
front, from 25N northward.

A surface ridge passes through 32N39W, to Puerto Rico. Surface
anticyclonic wind flow covers the Atlantic Ocean from 17N
northward from the cold front eastward.

The current cold front, that is extending from 26N65W to the
Windward Passage, will stall and weaken from 24N65W to
Hispaniola, from Wednesday through Thursday. High pressure will
build across the forecast area on Thursday. Southerly winds will
increase to the east of Florida on Sunday, in advance of a cold
front that is expected to move off northern Florida on Sunday
night.

$$
mt/dm
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