Well, that and knowing how to actually drive in snow. Here in the DC area, we get transplants from all parts of the country and the world, who only know that 1) snow is cold and white, and 2) "I have 4-
wheel drive, so I can drive in anything." That last is disproved with clockwork regularity by the sight of SUVs sitting in ditches everywhere.
When we get snow forecast here, people empty out the grocery stores of milk, bread, and toilet paper, apparently in the belief that the 2" of snow we're expecting will trap them in their homes for months and months. Then when the snow hits, they need to take their vehicle out and abandon it on I-95.
I lived 15 years in upstate New York, and I avoid going out in the snow now - not because I can't drive in the stuff, but because some knucklehead will be spinning his tires furiously ahead of me in a vain attempt to get to the end of our street.