Grist: You may have noticed its been a hot summer so far. June temperatures were above average across the world, and both NASA and NOAA ranked the month among the top five warmest since record keeping began in the late 1800s.
Not surprisingly, snow extent in the Northern Hemisphere was at its third-lowest on record by June. But what makes the current paltry snow cover more significant is the fact that, just a few months ago, the Northern Hemisphere was unusually snowy - April 2013 had the ninth-highest...