For the second consecutive day, the National Weather Service has issued a heat advisory for Pinellas County.
The advisory runs between noon and 7 p.m.
The heat index — the so-called feels-like temperature — reached 105 degrees in Pinellas County for about two hours Thursday and is expected to get up there again today.
High humidity, a lack of wind and high overnight temperatures are to blame. While Thursday's high of 93 in St. Petersburg was slightly above average, temperatures never dropped below 84 degrees at night.
"We've been days, basically, without any good winds," said Anthony Reynes of the National Weather Service in Ruskin.
Temperatures are expected to climb into the low to mid-90s today, but afternoon thundershowers should bring some relief to parts of the bay area, said Bay News 9 meteorologist Juli Marquez.
"Pretty much nothing has changed from yesterday," she said.
A large area of high pressure has essentially trapped heat and humidity over much of Florida this week, making for "feels-like" temperatures exceeding 100 degrees.
Temperatures have been above average all week, Marquez said.
The steamy weather is expected to continue over the weekend. Southwesterly winds should bring more showers and thunderstorms in the mornings. Highs should be in the low to mid-90s, Marquez said.
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