Pittsburgh, Pa. – Friday brings a summer weather alert to Allegheny County as scattered thunderstorms and thick fog threaten to snarl afternoon traffic and weekend events. Highs near 89°F will combine with building humidity, making outdoor plans uncomfortable and raising the risk of sudden, localized flooding.
According to the National Weather Service, showers and thunderstorms are likely after 2 p.m. Friday, with fog persisting through the morning commute. Patchy visibility could make travel hazardous along Route 51, I-376, and local Pittsburgh roads until the sun breaks through. Residents are urged to avoid unnecessary travel, keep mobile devices charged, and monitor for sudden downpours that can overwhelm low-lying roads.
Hot, muggy air continues into Saturday, with another round of patchy fog in the early hours and a renewed chance for storms after 2 p.m. Saturday’s high reaches 91°F, and while the region may see a few dry hours, thunderstorms will linger into the evening. By Sunday, conditions remain unstable—expect a 90°F high, scattered showers, and storms throughout the afternoon and into Sunday night. The risk of isolated power outages and brief street flooding persists, especially where heavy rain pools quickly.
Looking ahead:
A hot, stormy pattern continues Monday, with highs near 87°F and another round of afternoon thunderstorms. Tuesday stays mostly sunny, hot, and humid, with relief possible by midweek as the atmosphere stabilizes. Stay tuned for further advisories as conditions evolve.
Five-Day Pittsburgh Forecast (Friday, July 11 – Tuesday, July 15)
- Friday: Areas of morning fog. Showers and thunderstorms likely after 2 p.m. High 89°F.
- Saturday: Patchy fog early. More storms after 2 p.m. High 91°F.
- Sunday: Scattered showers and thunderstorms, mainly after 2 p.m. High 90°F.
- Monday: Chance of afternoon storms. High 87°F.
- Tuesday: Mostly sunny, hot, and humid. High near 90°F.
Storm risks and heat remain through early next week—keep weather alerts active and plan outdoor activities with caution.
