The good news: York's St. Patrick's Day parade will step off on a mild, sunny Saturday afternoon.

The bad news: It's probably going to snow Sunday night.

The National Weather Service says Saturday will hit a sunny but breezy high of around 55 in York County. The nighttime low will drop back down to 28, though, the NWS says.

Increasing clouds will roll in throughout Sunday, which will hit high temperatures around 39, the service says.

Snow will be likely after 8 p.m. Sunday night, which will see low temperatures of about 23. Snow has about a 50/50 chance of continuing into Monday — St. Patrick's Day — which will only see highs of 33, the NWS says.

As we've previously reported, the possible snow accumulation is still very much up in the air..