[Tropical] Tropical Weather Discussion

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AXNT20 KNHC 041226 AAA
TWDAT

Tropical Weather Discussion...UPDATED
NWS National Hurricane Center Miami FL
803 AM EDT Tue Sep 4 2018

UPDATED FOR INFORMATION ABOUT T.S. GORDON AND T.S. FLORENCE

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
1200 UTC.

...SPECIAL FEATURES...

The center of Tropical Storm GORDON at 04/1200 UTC is near 28.1N
86.2W, or about 165 nm/305 km to the ESE of the mouth of the
Mississippi River. GORDON is moving WNW, or 300 degrees, 14
knots. The estimated minimum central pressure is 1004 mb. The
maximum sustained wind speeds are 55 knots with gusts to 65
knots. Scattered to numerous strong rainshowers are within 75 nm
of the center in the NE quadrant, and to the ESE of the center.
Widely scattered moderate to isolated strong rainshowers are
elsewhere within 135 nm to the NE of the center, and within 300
nm to the SE of the center. Isolated moderate rainshowers are in
the remainder of the area, in Florida, to the east of GORDON.
The PUBLIC ADVISORIES about Tropical Storm GORDON are issued
under the WMO header WTNT32 KNHC and under the AWIPS header
MIATCPAT2. The FORECAST/ADVISORIES about Tropical Storm GORDON
are issued under the WMO header WTNT22 KNHC, and under the AWIPS
header MIATCMAT2.

The center of Tropical Storm FLORENCE at 04/0900 UTC is near
19.3N 42.0W. FLORENCE is moving WNW, or 290 degrees, 11 knots.
The estimated minimum central pressure is 995 mb. The maximum
sustained wind speeds are 60 knots with gusts to 75 knots.
Scattered to numerous strong rainshowers are within a 60 nm
radius of the center in all directions. Scattered moderate to
isolated strong rainshowers are elsewhere within 165 nm of the
center in the NE semicircle. Isolated moderate to locally strong
rainshowers are in the remainder of the area from 16N to 25N
between 37W and 44W. The PUBLIC ADVISORIES about Tropical Storm
FLORENCE are issued under the WMO header WTNT31 KNHC and under
the AWIPS header MIATCPAT1. The FORECAST/ADVISORIES about
Tropical Storm FLORENCE are issued under the WMO header WTNT21
KNHC, and under the AWIPS header MIATCMAT1.

...TROPICAL WAVES...

An Atlantic Ocean tropical wave is along 21W from 20N southward.
A 1007 mb low pressure is along the tropical wave near 10N.
Scattered strong rainshowers are from 13N to 16N between 20W and
24W. Widely scattered moderate to isolated strong rainshowers are
from 07N to 10N between 24W and 30W.

A Caribbean Sea tropical wave is along 74W/75W, from 21N
southward, through the Windward Passage to Colombia. The wave is
moving through an area of upper level cyclonic wind flow, with an
elongated NE-to-SW oriented trough. Isolated moderate to locally
strong rainshowers are from 15N northward between 70W and 80W.

A tropical wave is moving through the SW corner of the Gulf of
Mexico, along 93W/94W from 21N southward, across the Isthmus of
Tehuantepec of southern Mexico. Isolated moderate rainshowers are
within 120 nm on either side of the tropical wave.

...MONSOON TROUGH/ITCZ...

The monsoon trough passes through the coastal sections of Senegal
near 15N17W, to a 1007 mb low pressure center, that is along a
21W tropical wave, near 10N. The monsoon trough continues to
09N26W and 11N32W. The ITCZ is along 10N45W, to 06N59W in Guyana.
Widely scattered moderate to isolated strong rainshowers are
along the coast from 05N to 10N between land and 16W. Isolated
moderate to locally strong rainshowers are from 03N to 10N
between 35W and 60W, and from 02N south between 33W and 40W.

...DISCUSSION...

GULF OF MEXICO...

Please read the SPECIAL FEATURES section for details about
Tropical Storm Gordon. An upper level trough is west of Gordon
along 86W. Gordon is forecast to move NW during the next 24 to 36
hours. Upper level anticyclonic wind flow covers the rest of the
Gulf of Mexico.

CARIBBEAN SEA...

An upper level trough extends southward from the Gulf of Mexico
to Belize. Isolated moderate showers cover the NW part of the
Caribbean Sea north of 15N and west of 80W.

A tropical wave moving across Haiti will reach the western
Caribbean Sea by mid week. Fresh to strong winds will continue
near the coast of Colombia tonight. A relatively weak ridge
north of 20N will maintain moderate to fresh trade winds across
most of the region through the weekend.

ATLANTIC OCEAN...

Please read the SPECIAL FEATURES section for details about
Tropical Storm Florence. The projected path of Florence may bring
strong winds and seas to 9 ft to AMZ127 east of 62W by Thursday.
Refer to the Offshore Waters Forecast FZNT23 KNHC/MIAOFFNT3 for
more details.

An upper level cyclonic circulation center is near 27N57W. Upper
level cyclonic wind flow in a broad trough covers the region
north of 19N between 50W and 65W. Scattered moderate to isolated
strong showers are from 18N to 22N between 59W and 62W. Widely
scattered moderate showers are from 24N to 30N between 53W and
58W. Isolated showers are elsewhere in the area of upper level
cyclonic wind flow.

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

$$
mundell/mt
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