Hot and Steamy

Temperatures today will likely be some of the warmest of the year. But it's not just the temperatures that will make it very warm today but the humidity as well. The heat index becomes a big topic this time of year. It combines the actual air temperature with humidity levels to equal the temperature of what it feels like outside to a human. They use a complicated formula to come up with this heat index but have created a pretty simplistic table to describe the basics.This table shows air temperature on the top and then relative humidity levels on the left. Keep in mind that relative humidity is different from the dew point. You combine the two numbers in the middle and you will find the temperature that it feels like outside. We will be very borderline heat advisory criteria (heat index of 105-110 degrees) today and tomorrow. I have circled the areas that I am expecting many places across southern South Dakota, Iowa, and Minnesota to reach today and tomorrow. So try to drink lots of water and limit your outdoor activities because the next two days are going to be dangerously hot.

~KDLT Meteorologist Cody Matz