In case you didn't know, ice forms on surfaces.  Yes, that can be the result of many weather situations.  For those of you who are not familiar with these, let me give you a few examples. Cold, wet, snow.  Well, then have covered the in depth reasons why ice forms on surfaces.  Let it be known that while you are getting on the elevator at the parking garage, they will assume that you did not have this explanation of these weather patterns. Therefore they are not responsible for the header you take while wearing your rubber soled shoes to work on a cold, wet, snowy day.