AXNT20 KNHC 162338
Tropical Weather Discussion
NWS National Hurricane Center Miami FL
738 PM EDT Tue Jul 16 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
...Caribbean Gale Warning...
High pressure N of the area will support fresh to strong trade
winds over the central Caribbean through the forecast period, with
winds briefly increasing to gale-force over the NW coast of
Colombia by Wed night due to low pressure over northern Colombia
deepening. Seas will build to 8-14 ft as a result of these winds.
Please read the latest High Seas Forecast issued by the National
Hurricane Center under AWIPS/WMO headers FZNT02 KNHC/HSFAT2 or at
website https://www.nhc.noaa.gov/text/MIAHSFAT2.shtml for further
A tropical wave is off the coast of W Africa, with axis along 19W
from 05N-20N, moving west at about 10 kt. Scattered moderate
convection is noted east of the wave axis south of 12N between
A central Atlantic tropical wave extends its axis along 46W from
07N-20N, moving west at 10-15 kt. Scattered showers prevail along
the wave axis and south of 11N.
An Atlantic tropical wave extends its axis along 58W from 08N-
25N, moving west at 10-15 kt. Scattered showers are noted over the
southern portion of the wave mainly south of 11N.
A western Caribbean tropical wave extends its axis along 78W from
03N- 18N, moving west at 10-15 kt. Scattered showers prevail along
and east of the wave axis between 72W-78W.
The monsoon trough extends from the coast of Senegal near 14N17W
to 06N32W. The ITCZ extends from 06N32W to 04N43W, then resumes
west of a tropical wave near 08N48W to 08N57W. Besides the
convection mentioned in the tropical wave section, scattered
showers are noted within 180 nm north of the ITCZ between 48W-57W.
GULF OF MEXICO...
Weak surface ridging prevails over the basin, anchored by a 1022
mb high centered over the Florida Panhandle. With this, gentle
anticyclonic winds prevail across the Gulf waters. Scattered
showers are developing over the Yucatan Peninsula reaching the Bay
of Campeche at this time. This activity will continue overnight
as the usual thermal trough moves west from the peninsula into the
southwest Gulf. Scattered showers are also developing over
Florida and moving west reaching the far east Gulf waters mainly
east of 82W. This activity will dissipate tonight.
High pressure ridge will remain near the northern Gulf coast
through the weekend. Gentle to moderate east to southeast winds
will prevail across the basin, except that winds will be fresh to
strong to the NW of the Yucatan peninsula during the evening and
Refer to the Special Features section above for details on the
Gale Warning currently in effect for the south-central Caribbean.
Refer to the Tropical Wave section above for details on the wave
traversing the central Caribbean.
Aside from the convection related to the tropical wave, only
scattered showers are noted across the remainder of the basin.
Scatterometer data depicts gentle to moderate trades across most
of the basin except between 70W-80W, where moderate to fresh winds
High pressure north of the area will continue to support fresh
trade winds over the central Caribbean through the forecast
period. Winds will briefly increase to gale force along the coast
of Colombia by Wed night. Fresh to occasionally strong trade
winds will affect the Gulf of Honduras Tue night through Thu
night. The tropical wave along 78W will cross the western
Caribbean through Thu night. A surge of fresh to strong winds and
building seas will accompany this wave. The next tropical wave
will reach the Windward Islands tonight and move across the
eastern Caribbean Wed and Thu, across the central Caribbean Thu
night through Sat and into the western Caribbean Sat night.
Refer to the Tropical Waves section above for details on the
waves traversing the basin.
A surface trough extends from 30N66W to 28N69W. To the east,
another trough extends from 30N53W to 28N57W. Scattered showers
are noted along the troughs. Surface ridging prevails across the
remainder of the basin, anchored by a 1027 mb high centered
High pressure dominating the basin will maintain
gentle to moderate E to SE winds over the Bahamas. The high will
be strong enough to generate fresh to strong east winds between
the southeastern Bahamas and Hispaniola through Fri night,
primarily during the evening hours.
For additional information please