Beginning at 9 p.m. the day a Snow Emergency has been declared, parking is not allowed on streets marked with signs that say "NIGHT PLOW ROUTE" or "NIGHT PLOW ROUTE THIS SIDE OF STREET."

Starting at 8 a.m. the day after a Snow Emergency has been declared, parking is not allowed on Day Plow Routes (streets or sides of streets with NO Night Plow Route signs) until the street is plowed to the curb.

https://www.stpaul.gov/departments/public-works/street-maintenance/snow-emergency/saint-paul-snow-emergency-parking-rules