The major storm swirling toward Pennsylvania is already leading to travel disruptions.
All flights into and out of Philadelphia International Airport have been cancelled for Saturday, when the blizzard conditions are expected to be in full swing.
Airport spokeswoman Diane Gerace says airlines are being proactive ahead of the expected storm and decided to cancel all flights.
She says airlines hope to resume flights on Sunday, but travelers should check with their carriers to get detailed information.
The National Weather Service on Friday issued a blizzard warning for Philadelphia and its northern suburbs.
Snow is expected to start falling after 7 p.m. Friday and won't slow down until Sunday around 10 a.m. As much as 18 inches could fall around Philadelphia.