I don't have to say without hesitation that with the impending icy deep freeze this weekend how dangerous that presents to outdoor folks as Saturday is supposed to be a high temperature of only 11 degrees but a windchill real feel of MINUS 14 !
These conditions are prime for hypothermia and frostbite.If its not worth it, try to stay indoors. Sunday is supposed to be a little "balmier" but winds will die down
In any case for the weekend and anytime in winter when you are birding ( and go with friend(s) if possible) Here are the facts and safety tips on hypothermia and frostbite from the following link.
( and get those hand & feet warmers like "Hot Hands" good for 10 hrs warmth)
Remember, BE SAFE!