Just in from the festival website:
Need alternate plans? Saturday just happens to be Museum Day, brought to you by the Smithsonian Institution, where you can get free museum admission at participating museums and venues with tickets procured online. (My wife is intent on an outdoor gardens museum. I'm not sure that's going to work tomorrow.)
6th Maryland Microbrewery Festival 2011 Cancelled this YEAR Severe Weather ConditionsWHEN: Saturday September 24, 2011 11AM - 7PM Cancelled due to severe weather conditions and possible flash flooding. We regret this decision and will refund through Paypal advanced ticket sales.