Birmingham airport snow! Parking?

[Helpwhatwouldyoudonext]

Hi,
Am due to fly from BHX on Fri early morning. The forecast is for snow. I have to book a carpark - anyone any advice please?
I'm quite anxious the ones 14min away might be under snow!

Hello all - thought you might appreciate an update. Your advice was second to none, drove though the hazardous single motorway lane snow, reached the rail station, parked no problem, mono-railed it to the airport, made it to plane.
BUT runway is closed, been sitting on tarmac over an hour so far, another hour to go at least.
But I'm not trapped in a snow drift, and parked for £30 - thank you all. ☃