Let it snoooow...

It snooooooooooowed in Denver (final)
So I'm inspired to write about how to handle this (potentially) challenging weather condition...
Traction:
Having some bigger lugs (think deep grooves on a tire), trail shoes, or even YakTrax could help. If I'm running on sidewalks or roads, my biggest fear is black ice... so if I see a questionable patch, I'd rather jump in the snow for a bit. Even more packed down areas might be more slippery than deeper snow. Annnnnd if the sun is setting, really watch out for areas that look wet... with the shift in temps, they might actually be ice.
Layers:
It's better to be a bit too warm than too cold (esp for joints). Wool blends and dryfit are best when you start sweating (they tend to wick it away vs hold on to it and keeping you cold, esp if it's a longer run or you slow down). Having a layer to keep the wind out is VERY wise, even if it will only be blowing for a bit. And wearing as much reflective gear as possible, even in the middle of the day is wise.
Why?
Because you don't want to dress for the best part of the run, you want to dress for the potentially worst parts... the wind gusts, if you flip and ankle and need to walk, etc.
Effort level:
Cold weather is harder on the lungs, and when it's harder to breathe... it's harder to run.
Also, the HR will naturally be a bit lower.
And the joints will take a bit more time to warm up.
So do some activation work indoors, wear a buff when the temps drop, shorten your stride if it's slippery and judge based more on effort than pace or HR.