When OPM announces a delayed arrival due to an emergency condition that occurs before the workday begins, a delayed arrival may be announced. This means:

• You will be excused from work relative to your normal start time. For example, if a 2-hour delayed arrival is announced and you normally arrival at the office at 8 a.m., you would be authorized to arrive at 10 a.m.
• Your supervisor can excuse your tardiness beyond the announced late arrival time if you made a reasonably diligent effort to get to work on time.

Other factors your supervisor will consider when making this determination and the amount of additional excused absence are:

• Distance
• Availability and mode of transportation
• The success of other employees in similar situations in reaching the worksite