PENNSYLVANIA — Forecasters are warning that dangerous heat could affect Pennsylvania during the middle of June as a widespread heat wave is expected to develop across much of the United States.
According to the National Oceanic and Atmospheric Administration’s Climate Prediction Center, above-normal temperatures are forecast across the entire lower 48 states from June 11 through June 17. Pennsylvania is included in the area expected to experience sustained warmth as a strong ridge of high pressure builds over much of the country.
Meteorologists say the combination of above-average temperatures, increasing humidity and strong June sunshine could create potentially dangerous conditions across the Keystone State. Heat index values may rise well above actual air temperatures, especially during the afternoon and early evening hours.
The National Weather Service’s Weather Prediction Center said the developing weather pattern will promote above-average temperatures across the East Coast and Mid-Atlantic. Forecasters are particularly concerned about warm overnight temperatures, which can limit relief from daytime heat and increase the risk of heat-related illnesses.
“Warm low temperatures over much of the Mid-Atlantic could lead to moderate-to-major heat risk impacts for those without adequate cooling and hydration,” the Weather Prediction Center said.
Weather experts explain that a ridge of high pressure causes air to sink and warm, often leading to clear skies, limited rainfall and prolonged stretches of hot weather. Such patterns are commonly associated with major summer heat waves.
Forecasters expect the warm pattern to continue through at least mid-June, with portions of the eastern United States likely experiencing several consecutive days of above-normal temperatures.
Residents are encouraged to stay hydrated, limit strenuous outdoor activity during the hottest part of the day, seek air-conditioned locations when possible and check on elderly relatives, neighbors and others who may be vulnerable to extreme heat. Officials also remind residents never to leave children or pets unattended in vehicles, where temperatures can quickly become life-threatening.
