"In Hurricane Sandy, you can see the bottom temperatures off of New Jersey went from 10 degrees Celsius to near 18 degrees Celsius," he explains. During Sandy, COOL had a glider out right under the eye of the storm. "That's the equivalent of going from summer conditions to winter conditions in two hours." By contrast, during Hurricane Irene, the glider data shows the waters cooled down drastically, de-intensifying the storm. “In Irene, we saw there was an escape route for the storm surge,” Glenn explains. Because it was still summer, the ocean was stratified, with a warmer layer of water on top and a colder layer below. Churned up by the hurricane, the cold water at the bottom of the continental shelf cooled the warmer water at the surface, weakening the storm and reducing the storm surge, the wind-driven ocean water that piles up on shore during a hurricane.