The National Weather Service canceled the heat advisory for Palm Beach County, noting dew points were not high enough to reach alert level. A heat advisory is issued when the forecast calls for a heat index of 108 degrees for two hours or more.
The heat index, or “feels like” temperature, at Palm Beach International Airport was 105 degrees at 3 p.m.
Previous story: The National Weather Service has issued a heat advisory for Palm Beach County as heat index temperatures soar into the triple digits today.
The advisory is in effect until 6 p.m. tonight.
“Today looks to be the hottest day of the year so far,” National Weather Service meteorologists said this morning. “The stage is set for a dangerously hot day.”
Temperatures are expected to reach 94 degrees in West Palm Beach today, with a heat index as high as 110 degrees. Parts of Miami-Dade and Collier counties could see a heat index soar to 113 degrees.
Today’s heat advisory is the first for Palm Beach County since July 2016, which was the first in seven years.
Heat advisories are issued when the heat index, or “feels like” temperature is forecast to be 108 or higher for at least two hours.
Part of the blame for the string of warm days goes to the Bermuda High. Its push of east to southeasterly winds sends cooling afternoon thunderstorms into the interior of the state as opposed to allowing them erupt at the coast.
The high also means air is sinking. That sinking air warms by compression as it falls, working to evaporate clouds and allow for more sunshine.
“But the falling air doesn’t dry out the surface,” Thomas said. “If you get just a slight sea breeze, you’ll get the moist air, and that’s what will get the heat index up there.”
Today’s heat advisory includes all of South Florida. On Tuesday, there was a heat advisory for Miami-Dade and Collier counties.