A major economic development announcement for the Huntsville/Madison County area is expected Wednesday morning.

The Chamber of Commerce of Huntsville/Madison County issued a media advisory Tuesday morning for the event, which begins promptly at 10 a.m. and is not open to the public. Few details are known at this time about the nature of the announcement or where exactly the press conference will take place.

The announcement will be held at the Chamber building on 225 Church St. N.W., in downtown Huntsville only if it rains.

Although the Chamber has not said where the event will be, the media advisory did include driving and parking directions from downtown Huntsville:

Take 565 west to exit 3 (Greenbrier Road).

Turn right onto Greenbrier, then follow detour signs to turn right to stay on Greenbrier Road.

Continue straight on Greenbrier Road across Old Highway 20 at Greenbrier BBQ.

Assistants will greet guests and provide instructions on parking and exiting the site. AL.com has contacted the Chamber, City of Huntsville, Gov. Robert Bentley's office and the Alabama Department of Commerce for additional details.

Bentley's Press Secretary Yasamie R. August said Ed Castile with Alabama Industrial Development Training (AIDT) will be present at Wednesday's event.

Check back later for updates.