Most people consider me an expert computers (automation via software). Here's a scenario I thought of.
First, LSAC knew they would be closed today because of the weather.
Second, LSAC employees would be working from home via VPN access
When the scores start going out, it takes up a large amount of both bandwidth and processing power. If this were to happen in normal business hours, employees would have a real hard time trying to work remotely (dropped connections, lag time, etc).
So, they change the scores to be sent after hours so that it doesn't affect workers.
Just a thought.