it was 18 this morning--ahhhh, florida-like. i pulled on lots of clothes (i was actually hot!) and my new yak trax.
i can't explain it well enough, but check here: http://www.yaktrax.com/main.php3?primNavIndex=2&
it allowed me to run fast and easily--the snow piled up at corners was hard, but i could run on snow or ice without a problem!