Steering wheel vibration

[warecid]

Hey all,

I have a 2007 X5 4.8i (sports pckg with 20" wheels). I am experiencing significant vibration in my steering wheel (and in pretty much the entire vehicle) when on the highway. I just noticed the shaking last night at about 40-50 mph. We just had a really bad snow storm in the north jersey area and I spent the entire day yesterday digging my X5 out of the snow as I got stuck several times.

It does not look like I have any flat tires and my car isn't indicating any warnings, and it was running just fine on Sunday before the snow storm. Any chance this could be caused by freezing somewhere around my wheels? Hoping I did not damage anything when I got stuck in the snow.

Appreciate any input. Thanks...