What do you get when you mix together a hurricane, the remnants of a wintry midwestern storm, and cold Arctic air? The "Frankenstorm," which is what the US National Weather Service renamed Hurricane Sandy as it approached the US east coast during the week before Halloween in 2012. The combination of strange weather conditions may result in a powerful storm not unlike a nor'easter, with powerful winds and lots of rain for the mid-Atlantic and New England. Learn about how meteorologists predict hurricanes, and get ready for the Frankenstorm by stocking up on water and batteries for your flashlight in case you lose power.