I just received this from Björn at the Music Hall, and so I’m passing it on immediately:

Curt, just want to let you know we’re struggling to keep the stage comfortable in this extreme cold. We purchased a big warehouse heater, but on days when it’s very cold AND windy, it’s an uphill battle. It does look like tomorrow will be less windy, which will help, but maybe let everyone know to dress really warmly for the concert.

Please feel free to deviate from strict concert black as needed in order to feel comfortable. Layers will help, and heavier shoes.