South Florida has stumbled into an eighth straight day of dangerously hot weather as Saharan dust smothers moisture from above anemic clouds and the damp warmth of the surface is like walking in water.
It will be the longest back-to-back heat advisory in Palm Beach County since at least 2005, and before it expires — if it does — Wednesday. By 8pm, a series of notable heatwaves will be ‘felt’. Temperatures in Miami hit 100 degrees Celsius for the 30th straight day as of Monday.
“I find it unbelievable, but the word has lost its meaning these days,” said Brian McNoldy, a hurricane and climate researcher at the University of Miami, in a social media post Monday. “Miami hit a heat index of 109.9 degrees at 1pm.”
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West Palm Beach reached a heat index of 105 at 2:30 pm Monday.
The National Weather Service does not keep records of heat index temperatures, a measure of how air feels when high humidity reduces the human cooling mechanism of perspiration. But McNoldy has tracked temperatures in Miami, where the state had a heat index of over 100 degrees Celsius for 30 days, and on Monday, the heat index hit 105 degrees Celsius or higher for the fifth straight day.
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A heat advisory is issued for most areas when the heat index or “feels like” is expected to reach 108°C or higher for more than two hours. In Miami-Dade County, the Bureau of Meteorology issues a heat advisory if the heat index is expected to be 105 or higher for more than two hours.
“We’re humid, but the upper levels are less humid, so there’s no credible thunderstorm activity that gives us a respite from the heat,” said Cameron Pine, a meteorologist at the NWS office in Miami. rice field. . “It’s a pretty nasty combination.”
The heat is a common misery this summer, from Arizona’s scorching Sonoran Desert to the boiling Southern Plains to subtropical Florida.
After torrential rains from a slow-moving storm hit New York and Connecticut on Sunday and then reached New England, another problem hit the northeast on Monday. Some towns in Vermont were inaccessible due to washed out roads. The Associated Press reported that the storm caused hundreds of flights to be canceled at Kennedy, LaGuardia and Newark airports. About 200 flights were canceled at Logan Airport in Boston.
The NWS had forecast more rain and flash floods across Vermont on Monday as a coastal low pressure system pushes humidity into New Hampshire and Maine as well as Vermont.
For the southern United States, it’s a stubborn area of high pressure that’s been causing unusually high temperatures after it cut into the Gulf of Mexico last month. Nothing in the atmosphere can match it, rotating clockwise, compressing and heating the air as it sinks into a relentless heat pattern.
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At the same time, a weaker Bermuda High will reduce cool afternoon sea breezes in southeastern Florida.
And a delayed plume of the Saharan atmosphere that left the coast of Africa about two weeks ago reached the tip of the peninsula and the Gulf of Mexico over the weekend. That’s why the atmosphere 5,000 feet above Earth is “completely dry,” says Jason University of Miami meteorologist, who works with NOAA and the Atlantic Ocean Meteorological Institute to measure and track Saharan dust. Danion says.
“There was an increase in June, but it is behind schedule and not as normal,” Dunion said.
The dust could probably break off on Wednesday, but the larger plume that left Africa on July 3 is moving west and could reach Florida on Thursday, followed by the coast on Monday. Followed by a third plume that was moving offshore.
That means high temperatures in Palm Beach County are expected to hit mid-90s through at least Sunday. The normal maximum temperature at Palm Beach International Airport at this time of year is 90 degrees. Last Thursday, temperatures hit 97 degrees Celsius, breaking the previous record high of 95 degrees Celsius set in 1992. It hit 94 degrees on Monday, twice short of the 1981 record of 96 degrees.
“Unfortunately, there is nothing on the horizon that will change the situation,” said Andrew Olison, a meteorologist at the Center for Weather Prediction, who said the heat will not ease in the near future.
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Instead, the Center for Weather Prediction, part of the National Oceanic and Atmospheric Administration, expects temperatures to get hotter, extend in range and increase in magnitude, Olison said.
“If anything, it’s getting a lot hotter in Florida,” he says.
Sea surface temperatures along the Gulf of Mexico, the Straits of Florida and Florida’s east coast have been unusually warm for this year, Orison said, adding that the change occurred in the past month. Along Florida’s southwestern coast, water temperatures can be up to 5 degrees warmer than normal, reaching nearly 90 degrees in some places. Off the coast of Palm Beach County, it was about 3 degrees above normal, with temperatures nearing 88 degrees.
“Even if the sea breeze is blowing, it’s going over a very warm sea,” Pyne said. “This is definitely a heat wave.”
Scientists are wary of linking specific events to climate change, but McNoldy said global warming makes periods like the current one “a little more likely” to be long-lasting.
Kimberly Miller is a veteran journalist with the Palm Beach Post, part of the Florida USA Today network. She covers real estate and how growth affects the South Florida environment. Subscribe to The Dirt for weekly real estate roundups. If you have any news tips, please send them to firstname.lastname@example.org. Help us support our local journalism. Subscribe now.