[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 061116
TWDAT

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
616 AM EST Sat Jan 6 2018

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 0600 UTC surface analysis and satellite imagery through
1045 UTC.

...SPECIAL FEATURES...

An Atlantic Gale Warning has been issued for an area N of
Hispaniola starting Sun 07/1800 UTC lasting 12 hours. A cold front
will extend from 31N54W TO 26N60W then continue as stationary to
20N71W. Gale force winds will be S of 22N W of front to 74W,
including the approach to the Windward Passage. Seas will be 8-12
ft. See the latest NWS High Seas Forecast under AWIPS/WMO headers
MIAHSFAT2/FZNT02 KNHC for more details.

A Caribbean Gale Warning has been issued for the NW Caribbean
from N of 18N between 77W-82W starting Sun 07/1200 UTC lasting 18
hours. Seas will be 8-13 ft. See the latest NWS High Seas
Forecast under AWIPS/WMO headers MIAHSFAT2/FZNT02 KNHC for more
details.

...ITCZ/MONSOON TROUGH...

The monsoon trough extends from the African coast near 06N10W to
03N22W. The Intertropical Convergence Zone axis extends from
03N22W to 01N40W to the South American coast near 01S47W.
Scattered moderate convection is N of the ITCZ from 04N-09N
between 32W-38W. Scattered showers are elsewhere within 120 nm of
the ITCZ.

...DISCUSSION...

GULF OF MEXICO...

A ridge dominates the entire Gulf of Mexico anchored by a 1040 mb
high pressure located over Wisconsin near 48N94W. Broken
multi-layered clouds are over the central Gulf. Overcast low
clouds are banked up along the E slopes of the Sierra Madre
mountains, and are over the far W Gulf W of 95W. 5-10 kt N
surface winds are over Florida. 10-15 kt E winds are over the
Gulf. 5-10 kt S winds are over Texas. In the upper levels, a very
large trough is over the Gulf with axis from the Florida
Panhandle to the Bay of Campeche. Expect the slight cold air
advection to persist over Florida today.

CARIBBEAN SEA...

A quasi-stationary front extends from the Windward Passage near
20N73W to 16N78W to the SW Caribbean near 09N79W. 15-25 kt
northerly winds are presently W of the front. Scattered moderate
to convection is within 90 nm of the front. In the upper levels,
the base of a large trough is over the far NW Caribbean. An upper
level high centered over the Windward Islands near 12N66W is
producing ridging over the remainder of the Caribbean Sea. Expect
the stationary front to linger through Sunday, and dissipate
Monday. A gale warning has been issued for the NW Caribbean. See
above.

...HISPANIOLA...

Cloudiness with embedded showers and isolated tstms will persist
across the island today due to the frontal boundary. Fresh to
strong NE winds are expected through the Windward Passage and
northern coast exposures through Sunday. These winds will reach
gale force on Sunday evening. See Above.

ATLANTIC OCEAN...

The tail end of a cold front is over the W Atlantic from 31N63W
to 27N72W. Scattered showers are within 60 nm of the front. A
stationary front is over the central Atlantic from 31N56W to
the Windward Passage near 20N73W. Scattered moderate convection
is within 90 nm of this front. The central and eastern Atlantic
is under the influence of a surface ridge anchored by a 1032 mb
high centered S of the Azores near 34N33W. The tail end of a cold
front is over the E Atlantic from 31N10W to the Canary Islands
near 27N17W. Scattered showers are within 60 nm of the front.

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

$$
Formosa
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