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Tropical Weather Outlook
NWS National Hurricane Center Miami FL
200 PM EDT Thu Sep 17 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 recently
downgraded Tropical Depression Vicky, located over the eastern
1. Shower and thunderstorm activity has changed little today in
association with an area low pressure system located over the
southwestern Gulf of Mexico. Upper-level winds are gradually
becoming more conducive for development, and a tropical depression
or a tropical storm could form within the next day or so. The low
is expected to meander over the southwestern Gulf of Mexico through
tonight before moving slowly northward to northeastward on Friday
and Saturday. An Air Force Reserve reconnaissance aircraft is
scheduled to investigate the disturbance this afternoon. For more
information on this system, see High Seas Forecasts issued by the
National Weather Service.
* Formation chance through 48 hours...high...90 percent.
* Formation chance through 5 days...high...90 percent.
2. An elongated area of low pressure located a few hundred miles
south-southwest of the Cabo Verde Islands is producing disorganized
shower and thunderstorm activity. Environmental conditions are
expected to be conducive for development during the next few days,
and a tropical depression could form before upper-level winds become
less favorable by late this weekend. The system is forecast to move
west-northwestward at 10 to 15 mph during the next several days.
* Formation chance through 48 hours...medium...40 percent.
* Formation chance through 5 days...medium...50 percent.
3. Showers and thunderstorms have change little since this morning in
association with a non-tropical area of low pressure located over
the far northeastern Atlantic Ocean several hundred miles east of
the Azores. Some additional subtropical development is possible over
the next day or so as it moves east-southeastward and then
northeastward at about 10 mph. The system is expected to reach the
coast of Portugal late Friday. For more information on this system,
see High Seas Forecasts issued by Meteo France.
* Formation chance through 48 hours...low...30 percent.
* Formation chance through 5 days...low...30 percent.
High Seas Forecasts issued by Meteo France can be found under WMO
header FQNT50 LFPW and available on the web at
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