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Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 AM EDT Fri Sep 18 2020
For the North Atlantic...Caribbean Sea and the Gulf of Mexico:
The National Hurricane Center is issuing advisories on Hurricane
Teddy, located over the central tropical Atlantic, and on Tropical
Depression Twenty-Two, located over the southwestern Gulf of Mexico.
1. Showers and thunderstorms associated with an area of low pressure
located a few hundred miles southwest of the Cabo Verde Islands are
becoming better organized. Earlier satellite-derived wind data
indicated that this system does not yet have a well-defined center,
but it is producing winds near tropical-storm-force to its east.
Environmental conditions are expected to be conducive for additional
development during the next day or two and a tropical depression or
tropical storm is likely to form before the end of the week. This
system is forecast move west-northwestward at 10 to 15 mph through
the weekend. For more information on this system, please see High
Seas Forecasts issued by the National Weather Service,
* Formation chance through 48 hours...high...70 percent.
* Formation chance through 5 days...high...70 percent.
2. A small low pressure system located just west of the coast of
Portugal is embedded within a larger non-tropical low. Although
showers and thunderstorms associated with the smaller low are
showing signs of organization, the system will soon move inland
over Portugal and further tropical or subtropical development
is unlikely. The low is producing gale-force winds, and will likely
bring gusty winds and brief periods of heavy rain to portions of
western Portugal today and tonight. For more information about
potential hazards in Portugal, please see products issued by the
Portuguese Institute for the Sea and the Atmosphere (IPMA). For more
information about marine hazards associated with this system, see
High Seas Forecasts issued by Meteo France.
* Formation chance through 48 hours...low...20 percent.
* Formation chance through 5 days...low...20 percent.
3. Post-tropical cyclone Paulette is located several hundred miles
north-northwest of the Azores. The cyclone is forecast to move
quickly southward for the next few days and then stall over
marginally warm waters a few hundred miles south or south-southwest
of the Azores by the end of the weekend. The cyclone could
subsequently redevelop tropical characteristics late this weekend or
early next week while it moves little.
* Formation chance through 48 hours...low...20 percent.
* Formation chance through 5 days...low...30 percent.
4. Another tropical wave is forecast to move off the west coast of
Africa by early Saturday. Some gradual development of the system
will be possible thereafter while it moves generally
west-northwestward over the far eastern Atlantic.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 5 days...low...20 percent.
Public Advisories on Tropical Depression Twenty-Two are issued
under WMO header WTNT32 KNHC and under AWIPS header MIATCPAT2.
Forecast/Advisories on Tropical Depression Twenty-Two are issued
under WMO header WTNT22 KNHC and under AWIPS header MIATCMAT2.
Products issued by the Portuguese Institute for the Sea and the
Atmosphere (IPMA) are available on the web at https://www.ipma.pt.
High Seas Forecasts issued by Meteo France can be found under WMO
header FQNT50 LFPW and available on the web at
www.meteofrance.com/previsions-meteo-marine/bulletin/grandlarge/
metarea2
High Seas Forecasts issued by the National Weather Service can be
found under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and
online at ocean.weather.gov/shtml/NFDHSFAT1.php
Forecaster Latto
Original author: NHC
