Atlantic Tropical Weather Outlook

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September 17, 2020


ABNT20 KNHC 170552


Tropical Weather Outlook

NWS National Hurricane Center Miami FL

200 AM EDT Thu Sep 17 2020

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

The National Hurricane Center is issuing advisories on

recently downgraded Tropical Depression Sally, located inland

over southeastern Alabama, on Hurricane Teddy, located over the

central tropical Atlantic, and on Tropical Storm Vicky, located over

the eastern tropical Atlantic.

Thunderstorm activity associated with a low pressure system located

over the southwestern Gulf of Mexico has increased in coverage and

organization this morning. In addition, recent satellite-derived

surface wind data indicate that the low has become better defined.

Upper-level winds are expected to gradually become more conducive

for development, and a tropical depression is likely to form during

the next day or so while the low meanders over the southwestern Gulf

of Mexico. An Air Force Reserve reconnaissance aircraft is scheduled

to investigate the disturbance later today, if necessary.

* Formation chance through 48 hours...high...70 percent.

* Formation chance through 5 days...high...90 percent.

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 over the weekend. The low 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...60 percent.

A non-tropical area of low pressure is located over the far

northeastern Atlantic Ocean a few hundred miles east-northeast of

the Azores. This system is forecast to move east-southeastward and

then northeastward at about 10 mph over the next day or two, and its

chances of acquiring some subtropical characteristics before it

reaches the coast of Portugal late Friday appear to be decreasing.

For more information on this system, see High Seas Forecasts issued

by Meteo France.

* Formation chance through 48 hours...low...10 percent.

* Formation chance through 5 days...low...10 percent.


High Seas Forecasts issued by Meteo France can be found under WMO

header FQNT50 LFPW and available on the web at



Forecaster Stewart

Click here to read more at The National Hurricane Center

News date : 09/17/2020    Category : Hurricane, Weather

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