Relative humidity is a simple concept as weather phenomena go – but it has significant, far-reaching consequences for how we must take care of ourselves on a hot or wet day. Humidity is the amount of ...

Humidity - arguably the most important factor in deciphering how pleasant a day will be. We all know 90 degrees with high humidity and 90 degrees with no humidity is a different ball game. The ...

If you stepped outside this afternoon, you probably noticed it almost instantly. The air felt heavy, thick, and distinctly ...

Meteorologist Ray Petelin joined the KDKA Weather Team in October 2018, but is no stranger to the weather in Pittsburgh and Western Pennsylvania. He has been forecasting in Pittsburgh since 2011 and ...

Humans, microbes (bacteria, viruses, fungi), and plants all react differently to dry ambient conditions. Microbes adapt quickly by shrinking down, forming thicker membranes, and becoming dormant.