How Hot Is It In South Florida? Let Us Count The Ways 

“WBGT” may sound like a classic rock radio station playing cool songs, but it’s really yet another way for experts to tell us how dreadfully hot it is in South Florida, with a little more precision. The National Weather Service routinely informs us what the heat index, or “feels-like” temperature is, but the agency has recently been emphasizing what’s called the Wet Bulb Globe Temperature, or WBGT. Like the heat index, the WBGT measured air temperature and relative humidity, but also adds in key factors such as wind speed, cloud cover and even sun angle to estimate the combined effect on the human body. “WBGT is a measure of the heat stress in direct sunlight,” said Robert Molleda, head meteorologist at the National Weather Service’s Miami office. He said it’s an additional tool in keeping the public informed of how the weather may affect them. “It’s designed for people who are working or exercising in direct sunlight, such as the military — they’ve been using it for many years.