Tenth update today from the SHA operations center in Hanover:

Sunday, bloody Sunday, is on its way. Think of it as Saturday on the rocks.

 To the delightful mix of freezing rain, sleet and 28-plus inches of snow we've seen in the last 36 hours we should soon be adding a measure of ice as the snow melted by salt treatments freezes in sub-25 temperatures.

In interviews here, Gov. Martin O'Malley warned that conditions on the roads could be more treacherous Sunday and Monday than they were Saturday. The governor said he won't announce until Sunday whether non-essential state employees will have the day off Monday, but the betting here is that they won't be working. Stay tuned.

 Another big decision being watched by transportation planners is the federal government's call on whether its offices will shut down Monday. That decision will determine whether MARC trains and MTA commuter buses run.