[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 210538
TWDAT

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
105 AM EST WED DEC 21 2016

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
0515 UTC.

...SPECIAL FEATURES...

.None.

...THE ITCZ/THE MONSOON TROUGH...

The Monsoon Trough extends from the coast of Africa at 10N14W to
07N17W. The ITCZ continues from 07N17W to 03N23W to 02N30W to
03N40W to the coast of South America at 01N50W. Scattered
moderate to isolated strong convection is noted from 00N-05N
between 20W-32W.

...DISCUSSION...

...THE GULF OF MEXICO...

A quasi-stationary front extends from Punta Gorda Florida at
27N82W to 25N90W to 22N92W to the Bay of Campeche at 18N93W.
The front is mostly void of precipitation. Over the SW Gulf of
Mexico S OF 24.5N W of front, winds are NW to N 20-30 kt, with
seas to 11 ft. The remainder of the Gulf has 10-20 kt NE winds.
Temperatures over the Florida Panhandle are presently in the
50's, while temperatures over S Florida are in the 70's. In the
upper levels, an upper level high is centered over central
Mexico near 21N101W. Upper level ridging is over the Gulf of
Mexico with strong subsidence. Expect the elevated platforms in
the n-central Gulf to have reduced visibility in fog and low-
level stratus tonight. Also expect the front to dissipate over
the next 24 hours.

...THE CARIBBEAN SEA...

15-25 kt NE surface flow is over the central and western
Caribbean. Scattered showers are along the coasts of Nicaragua
and Costa Rica. The eastern Caribbean has 15-20 kt tradewinds
with isolated moderate convection E of 70W. In the upper levels,
northern upper level flow is over the central and western
Caribbean with strong subsidence. An upper level low is centered
over Puerto Rico with upper level moisture over the eastern
Caribbean. Expect over the next 24 hours for precipitation to
spread to the central Caribbean.

...HISPANIOLA...

A sharp transition line between deep moisture and pronounced
drying subsidence is currently orientated n to s along 70W.  The
line will shift w tonight into Wed allowing showers along the
east coast to spread w across the central and western portions
of the Dominican Republic, and possibly reach eastern Haiti late
Wed.

...THE ATLANTIC OCEAN...

A quasi-stationary front extends over the western Atlantic from
31N74W to Fort Pierce Florida at 27N80W. Scattered showers are
within 30 nm of the front N of 29N. A surface trough is over the
central Atlantic from 27N49W to 22N51W. Scattered showers are
within 45 nm of the trough. Another surface trough is over the
eastern Atlantic from 31N27W to 27N26W. Scattered showers are
also within 45 nm of this trough. A 1035 mb high is centered
over the eastern Atlantic near 38N28W with ridge axis extending
WSW to 31N65W. Expect the front to dissipate over the next 24
hours.

For additional information please visit
http://www.hurricanes.gov/marine

$$
Formosa
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