The National Weather Service posted excessive heat watches for several counties along Lake Ontario’s southern shore, including Niagara and Orleans counties.
Heat indices as high as 110 degrees are possible between noon Friday and early Saturday evening, the weather service said.
(National Weather Service)
An excessive heat watch means forecasters expect a prolonged period of exceptionally hot temperatures.
“The combination of hot temperatures and high humidity will combine to create a dangerous situation in which heat-related illnesses are possible,” the weather service said.
Forecasters said those who spend prolonged periods of time outside or in locations that are not air-conditioned are likely to suffer heat illness.
“Prolonged heat is most dangerous for young children and the elderly,” forecasters said. “Car temperatures can reach lethal temperatures in minutes.”
Heat indices across portions of Western New York are expected to reach the ‘danger’ category. (NWS)
Although this is the warmest part of the year for Western New York climatologically, the heat that’s expected is anomalously hot.
The expected heat indices are in the warmest 1 percent of July days for the region, data shows.
The oppressive heat is being generated by a sub-tropical ridge of high pressure. With it, high humidity is expected.
Temperatures are expected in the low to mid-90s during the day Friday and Saturday in spots away from the lake. Metro Buffalo is expected to be in the upper 80s.
Overnight lows across Western New York are expected to remain in the low 70s, the weather service said.
“This heat, combined with dew points in the mid 70s, will support stifling heat index values possibly as high as 105-107,” the weather service said. “Heat advisories can be expected for the entire region, with the risk for excessive heat warnings for some of the counties bordering the south shore of Lake Ontario.”
— Brian Brettschneider (@Climatologist49) July 16, 2019
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