See how to interpret dew point & relative humidity numbers that you see on weather reports. Here's how they relate to the heat index (the "feels like" temp)
Heat waves are prolonged periods of excessive hot weather. A heat wave can bring record-breaking temperatures and heat-related injuries to scores of people.
A weather model is one of the most important tools in making a weather forecast. Now you can make your own weather forecasts using weather models from the National Weather Service!
It's one thing to look up at the lcouds from the ground. It's another to know how high those clouds are and how many layers of clouds are up there. You can figure that out with a quick glance at a cool weather chart called a SkewT.
Strong wind can make a cold day feel even colder by robbing heat from the human body. Here's the formula used by the National Weather Service and a link to the wind chill calculator.