Someone ended an email to me last week with "Stay warm." Not to sound like a jerk, but I happened to be answering email outside with my t-shirt on and sweater slung over the chair. I was also half-wondering whether I should change into shorts. Anyway, this map by Alexandr Trubetskoy, or reddit user atrubetskoy, might be of interest to many of you not in California. It shows an estimated amount of snow required to close school for the day, by county.