The options for OPM tomorrow are not easy. The roads will be a nightmare due to the cold temperatures and horrible timing of heavy snow between 4AM and 8AM (the DC Rush hour). A two-hour delay may not serve any purpose because it will still be snowing between 8AM and 10AM.
Snow should taper off and end between 10AM and noon with lingering flurries during the afternoon hours. The best two options for OPM tomorrow (in my humble opinion): Delayed Opening at 11AM or Close the Government.