Philadelphia is currently under a spell of unseasonably warm weather, with temperatures hitting 80°F (27°C) over the weekend. This warmth, combined with high humidity, has prompted the National Weather Service to issue alerts for potential thunderstorms. A warm front moving in from the southwest is the culprit, bringing moist air that could lead to scattered showers and thunderstorms, particularly in the afternoons and evenings. Residents are urged to stay informed about weather updates as the situation develops.