Weather alert: Heat advisory issued for the Miami area. How steamy will it get?

A heat advisory has been issued for South Florida.

The advisory from the National Weather Service will be in effect from 10 a.m. to 8 p.m. Friday. While temperatures are expected to rise to the mid-90s, it could feel as high as 105 when you mix in humidity, according to the weather service.

“It’s going to be another scorcher,” said Lissette Gonzalez, a meteorologist with Miami Herald news partner CBS News Miami. “Super steamy.”

So steamy that the thermometer reached more than 80 degrees in Miami at 5 a.m., and Key West was already in the mid-80s and feeling like the mid-90s.

MORE: It’s feeling like 100 degrees outside. So how cold should you set your A/C thermostat?

What is the heat index?

The heat index is a measure of how hot it really feels when relative humidity is factored in with the actual air temperature, according to the weather service.

Last year, Miami-Dade County weather service officials announced plans for raising awareness of environmental extreme heat hazards. Among the initiatives: the declaration of a Miami heat season that runs from May 1 to Oct. 31.

Previously, the weather service issued a heat advisory when the heat index hit 108 degrees. Now, the local weather service in Miami issues a heat advisory if the index is 105 degrees for at least a couple of hours.

Rain chance

The one good part of the forecast: Not much rain is expected Friday. Rain chance is about 10 percent, with anything falling coming after 4 p.m., according to the weather service. That will change on Sunday, when rain chance rise to 50%.

Looking ahead

The heat isn’t ending after Friday. Temperatures in the 90s are also forecast through the weekend and into Monday in South Florida.

This story was originally published May 17, 2024 at 5:55 AM.