[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 262335
TWDAT

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
635 PM EST Thu Dec 26 2019

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
2315 UTC.

...SPECIAL FEATURES...

...CENTRAL ATLANTIC GALE WARNING...

A cold front is over the central Atlantic from 31N38W to 29N40W
to 28N44W. Gale force winds are from 30.5N to beyond 31N between 36W
and 37.5W with seas 15 to 19 FT in NW to W SWELL. The gale is
expected to end at 27/0600 UTC tonight. Please refer to the
latest NWS High Seas Forecast issued by the National Hurricane
Center under AWIPS/WMO headers MIAHSFAT2/FZNT02 KNHC for further
details.

...MONSOON TROUGH/ITCZ...

The monsoon trough extends from the coast of Sierra Leone near
08N13W to 07N17W. The ITCZ extends from 07N17W to 04N23W to
03N35W to the coast of N Brazil near 01N50W. Scattered moderate
to isolated strong convection is from 03N-05N between 29W-35W.
Isolated moderate convection is from 02N-06N between 35W-49W.

GULF OF MEXICO...

A surface trough extends across the central Gulf of Mexico from
28N90W to 24N91W to the NE Yucatan Peninsula near 21N87W.
Scattered showers are within 60 nm of the trough. Elsewhere,
isolated showers are over the SE Gulf of Mexico and S Florida.
Fresh E winds are over the eastern Gulf of Mexico. Light to
gentle winds cover the western Gulf.

Locally dense fog is expected within 30 nm of the mouth of the
Mississippi between midnight tonight and mid morning Fri. A weak
surface trough will drift west across the central and western Gulf
through Fri. Fresh to locally strong E to SE winds are expected
east of the trough. Fresh to locally strong southerly return flow
will set up over the NW Gulf on Sat ahead of a cold front forecast
to enter the NW Gulf Sat night into Sun. Then, fresh to strong N
winds will follow the front, which will extend from the Florida
Big Bend to near Veracruz, Mexico on Mon.

CARIBBEAN SEA...

A cold front extends from 19N64W to E Puerto Rico near 18N66W to
17N69W, and dissipating stationary to 15N74W. Scattered moderate
to isolated strong convection is from 17N-19N between 63W-66W,
including the Virgin Islands. Scattered moderate showers are
elsewhere within 45 nm either side of the front.

Light and variable winds will prevail over the western Caribbean
through Fri night. Winds and seas will increase over the central
Caribbean Fri through Sun as high pressure builds over the western
Atlantic.

ATLANTIC OCEAN...

Refer to the section above for details on the Gale Warning
currently in effect for the central Atlantic.

A 1023 mb high is over the W Atlantic near 34N72W. A cold front
is over the central Atlantic from 31N38W to 29N40W to 28N44W. A
stationary front continues to a triple point near 27N59W. A cold
front extends S from the triple point to 19N64W to E Puerto Rico
near 18N66W. An occluded front extends from the triple point to
26N62W to a 1010 mb low near 24N63W. A surface trough extends S
from this low to 21N68W. Widely scattered moderate convection is
within 120 nm of the stationary front.

High pressure building over the western Atlantic will support
fresh to strong NE to E winds across the southern waters through
Sat night. Fresh to strong SE to S winds are expected east of
Florida Sat night through Sun night. A cold front will push E from
Florida Mon night.

$$
Formosa
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