Here’s the official notice. They mean midnight on Friday, 1/21, since Thursday will have just ended.
CITY OF LYNN
SNOW EMERGENCY/PARKING BAN WILL BE IN EFFECT
Thursday, January 21, 2011
All applicable parking, ticketing and related ordinances and laws are in effect. All parked vehicles must be removed from city streets. The Snow Emergency will be in effect until the storm has passed and the streets have been cleared of snow and ice.”