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Weather Pennsylvania: Lehigh Valley braces for intense summer heat<\/strong><\/p>\n A heat wave is set to grip the Lehigh Valley starting this weekend, with the region expected to experience its first string of 90-degree days (above 32\u00b0C) of 2025<\/strong>, forecasters say. The National Weather Service<\/strong> has issued alerts for intense heat and dangerously high humidity<\/strong>, as heat index values could climb into the upper 90s (above 35\u00b0C)<\/strong> by early next week.<\/p>\n <\/p>\n From rainy chill to intense heat<\/strong><\/p>\n After days of cloudy skies, scattered showers, and below-average highs in the 60s (16\u201320\u00b0C)<\/strong> to start the week, a dramatic warm-up will take hold beginning Wednesday<\/strong>. Temperatures will rise into the mid-80s (around 29\u00b0C)<\/strong>, with a powerful Bermuda high setting up offshore<\/strong> by Thursday, allowing warm and humid air to surge in from the southwest<\/strong>.<\/p>\n By Thursday and Friday<\/strong>, high temperatures in the Lehigh Valley are expected to reach the low 90s (around 33\u00b0C)<\/strong>, signaling the arrival of the first significant summer heat surge<\/strong>.<\/p>\n <\/p>\n Risk of widespread heat-related impacts<\/strong><\/p>\n The NOAA HeatRisk map<\/strong> places much of Eastern Pennsylvania<\/strong> \u2014 including the Lehigh Valley and Philadelphia metro area<\/strong> \u2014 under level 2 to level 3 heat risk<\/strong>, meaning most individuals, especially those without proper cooling or hydration, could be affected<\/strong>. Dew points climbing into the low 70s (21\u201322\u00b0C)<\/strong> will contribute to heat index values topping out in the mid to upper 90s (35\u201337\u00b0C)<\/strong>.<\/p>\n <\/p>\n Severe storms possible Thursday night before heat wave locks in<\/strong><\/p>\n A strong cold front is forecast to sweep across the region Thursday evening<\/strong>, potentially triggering severe thunderstorms<\/strong>. The Storm Prediction Center<\/strong> has issued a 15% risk area<\/strong> for damaging wind gusts<\/strong> across parts of the Northeast and Mid-Atlantic<\/strong>.<\/p>\n Behind the front, a strong upper ridge is expected to dominate<\/strong>, ushering in what may be the first official heat wave of the season<\/strong> \u2014 defined as three or more consecutive days of 90\u00b0F (32\u00b0C) or higher<\/strong>.<\/p>\n <\/p>\n Meteorologist Bobby Martrich expects the heat wave to peak Sunday<\/strong><\/p>\n According to EPAWA meteorologist Bobby Martrich<\/strong>, Sunday, June 22<\/strong>, will likely mark the start of a short but intense heat wave<\/strong>, with temperatures reaching the low to mid-90s (33\u201335\u00b0C)<\/strong> through at least Tuesday, possibly extending into Wednesday<\/strong>.<\/p>\n \u201cIt\u2019s going to be very soupy,\u201d Martrich noted in his latest video forecast. \u201cWe\u2019ll have a southwesterly flow<\/strong>, which brings high humidity and oppressive heat<\/strong>.\u201d<\/p>\n The heat wave is expected to ease by Wednesday, June 25<\/strong>, as another front moves in. Martrich emphasized, \u201cThis isn\u2019t going to be a weeks-long event \u2014 we\u2019re looking at a 3-to-4-day window of serious heat<\/strong>.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":" Weather Pennsylvania: Lehigh Valley braces for intense summer heat A heat wave is set to grip the Lehigh Valley starting this weekend, with the region expected to experience its first string of 90-degree days (above 32\u00b0C) of 2025, forecasters say. The National Weather Service has issued alerts for intense heat and dangerously high humidity, as […]<\/p>\n","protected":false},"author":2,"featured_media":4350,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4349","post","type-post","status-publish","format-standard","has-post-thumbnail","category-news"],"yoast_head":"\n