The National Weather Service forecast office in Sterling, Va. is warning of high heat index readings tomorrow as winds from the southwest begin pumping more humidity into the region. That means anyone working outdoors, or stuck inside with no air conditioning, could encounter some dangerous overheating from the combined effects of heat and humidity. New to Baltimore? You're gonna love this weather.

They're expecting this "misery index" to climb into the high 90s, particularly in the "heat islands" of downtown Baltimore and Washington. The actual forecast high isn't that bad - 92 degrees at BWI-Marshall. That's only a shade warmer than today's high of 91 at BWI.

But after that - actually by late in the day Thursday - the rain chances begin to climb as the threat of showers and thunderstorms increases. That threat will bump to 50 percent for the weekend and beyond. We could have a real active few days. But the daytime temperatures will moderate - falling to the 70s by Sunday.

I remember when we first moved to Baltimore - from Massachusetts - in June 1980, the first several weeks we were here it seemed like we had thunderstorms virtually every day. We thought we had moved to the Amazon. Thunderstorms are amazing, and beautiful ... provided nothing heavy, or electric, strikes your house.