Reduced barometric stress generally indicates rainfall, so it usually rainfalls at reduced barometric stress as well. Radon degrees inside a residence often tend to rise a number of hrs after reduced barometric stress and also high winds happen outside, so it's not extremely wise to run a radon examination right after a tornado.
Does opening Additional info windows reduce radon?
Opening windows improves air circulation and ventilation, helping move radon out of the house and mixing radon-free outside air with indoor air. Opening basement windows helps reduce negative air pressure, diluting radon with clean outdoor air.