The central United States is gearing up for the season’s most intense heat wave yet, with temperatures forecast to soar into the 90s and even surpass 100 degrees Fahrenheit across a vast area stretching from the Rockies to the Mississippi Valley.
AccuWeather meteorologists warn that these sweltering to dangerous conditions will coincide with the time of year when the sun is highest in the sky, significantly amplifying the perceived heat.
According to AccuWeather Senior Meteorologist Alex Sosnowski, an area of high pressure building at both the surface and jet stream levels will be the primary driver of this extreme warmth. This atmospheric setup is expected to deflect much of the Canadian wildfire smoke northward and suppress thunderstorm activity, further contributing to clear, hot days.
“Warmth into Monday is just a taste for what is ahead later this week,” Sosnowski noted, indicating a sustained period of oppressive heat.
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Cities across the region are preparing for unprecedented highs. Denver, which had only reached 92 degrees as its highest temperature this year as of June 15, is now forecast to exceed 100 degrees during the peak of the heat wave. While Denver will see a brief cool-down into the 70s and 80s mid-week, an even more significant heat wave is expected from Friday into next weekend, bringing several days of 90- and 100-degree temperatures.
Much of the region, from the eastern slopes of the Rockies to the High Plains and parts of the Mississippi Valley, will experience temperatures 10 to 20 degrees above historical averages. St. Louis, which has yet to hit 90 degrees this year, is predicted to see highs well into the 90s from late this week into the following week, following a brief taste of 90-degree weather on Tuesday. Chicago, having already experienced a couple of 90-degree days this spring, is forecast to endure a daily stretch of 90-degree temperatures, potentially eclipsing its current season high of 94 degrees set on May 15.
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The combination of surging temperatures and significant humidity levels will create hazardous conditions. Sosnowski emphasized the importance of caution, stating, “The vast zone of heat with significant humidity levels will make for dangerous conditions, and care should be taken not to overdo any activity in the midday and afternoon hours.”
The timing of this heat wave, just weeks before the summer solstice on June 22, means the sun’s intensity will be at its peak, drastically increasing AccuWeather RealFeel® Temperatures. Experts warn that even physically fit individuals are susceptible to heat exhaustion and heat stroke under these extreme conditions. Residents are advised to stay hydrated, seek air-conditioned environments, and monitor the AccuWeather RealFeel® on their free app to plan activities and stay safe.
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