Heat advisories were issued Tuesday for parts of South Florida with heat index values expected to soar as high as 109 degrees.
The advisories cover Collier County but not the immediate coastal areas and were posted from 2 p.m. to 6 p.m. [They were expanded Tuesday afternoon to include portions of Miami-Dade County.] The forecast high in inland Collier is 96, and with calm winds and high humidity it would probably be wise to cancel all picnic plans.
On Wednesday it’s rinse and repeat, so expect advisories to be extended another day. Temperatures across South Florida may edge down slightly as the weekend approaches, but the only real relief may come from sea-breeze-driven thunderstorms in the afternoon.
The storms will affect mostly inland areas, though, with rain chances on the East Coast only in the 20-30 percent range through Friday.
“Hot temperatures and high humidity will combine to create a situation in which heat illnesses are possible,” the National Weather Service in Miami said. “Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.”
It won’t exactly be football weather in Central Florida either, with heat index values ranging up to near 105 degrees inland from east of Tampa across the peninsula and into the Orlando area, where forecast highs Tuesday and Wednesday are 96.
Metro South Florida maximum temperatures on Monday: Miami, 93 (heat index 103); Fort Lauderdale, 90 (heat index 103); West Palm Beach, 92 (heat index 100).
The heat index at Kendall-Tamiami Executive Airport was 105 at 1 p.m. Monday; ditto to the north in Pembrooke Pines.
One of the state’s hot spots Monday was Fort Pierce, where the actual temperature hit 96. The heat index was 108.
Rain chances will be on the increase next week, forecasters said, as a trough along the U.S. East Coast turns winds over the Florida peninsula to the southwest, driving any storms that form in the interior toward the Atlantic Coast.
TROPICS WATCH: The National Hurricane Center is forecasting no tropical development in the Atlantic through at least Sunday. Forecast models have, off and on, predicted development from a Central Atlantic tropical wave. But dry air still rules in the Atlantic, and this seems to be keeping a lid on tropical storm formation.
According to a post Monday on Weather Underground, conditions may be coming together for a very active August, however.
Colorado State University will issue an updated tropical outlook a week from Friday, on August 4.