A
Heat Advisory has been issued for Lehigh, Northampton and Warren counties
from 10 a.m. to 8 p.m. Thursday, with extreme heat and humidity creating potentially dangerous conditions for residents.
Heat index values — a real-feel measure of air temperature and relative humidity — are expected to surpass 100 degrees, prompting safety concerns for outdoor activities.
The
National Weather Service
warns of oppressive humidity with dew points in the mid-70s, making the heat feel even more intense. Scattered showers and isolated thunderstorms are possible with a marginal risk of severe weather. At Lehigh Valley International Airport, the best chance for rain is after 4 p.m. Thursday, with a 30% probability of precipitation.
Southwest winds 5-15 mph may gust up to 25 mph, providing minimal relief from the heat.
Residents are advised to take precautions during the heat advisory, including staying hydrated, avoiding prolonged outdoor exposure, and checking on vulnerable populations such as elderly neighbors and young children. Air-conditioned spaces and cool, light clothing are recommended to prevent heat-related illnesses.
The heat wave will begin to break Friday as a cold front moves through the region, bringing temperatures down to the low to mid-80s and reducing humidity. Dew points are expected to drop into the 60s, providing more comfortable conditions by Friday evening. The weekend will see more moderate temperatures, with Saturday offering a pleasant day with highs in the mid-80s and lower humidity.
Looking ahead, another warm-up is anticipated early next week as high pressure shifts offshore, potentially bringing back increased temperatures and humidity by Tuesday and Wednesday. Residents should continue to monitor local weather updates and be prepared for changing conditions.
Follow your local forecast from AccuWeather at
lehighvalleylive.com/weather
with National Weather Service watches, warnings and other advisories available as they’re issued at
lehighvalleylive.com/weather-alerts
.
Current weather radar
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Generative AI was used to produce an initial draft of this story, which was reviewed and edited by
lehighvalleylive.com
staff.
