Fabulous, Chamber-of-Commerce weather across the region today. The overnight low on the WeatherDeck was a refreshingly cool and dry 51 degrees. Who can remember all the 90-degree weather we've seen already this year? (Seven days over three months.)

So, if you haven't thrown open your windows and shut down the AC, you should. We slept with a cool breeze and a light blanket over us last night and the house smelled fresher this morning. The only drawback was the racket from the birds in the neighborhood. We're approaching the earliest sunrise of the year on Monday, and those little peckers are up WAY too early. Anyone?

The overnight low out at BWI was a bit higher - 56 degrees. That's a few degrees cooler than the long-term average low for June 8, which is 59 degrees. The record lows for this time of year at BWI remain stuck in the 40s.  

We remain under the influence of high pressure centered over the mid-Atlantic. The clockwise circulation around the high has been drawing cool, dry air down out of Canada on northwest winds.

But it can't last, of course. Low pressure is approaching from the Midwest, and it's expected to bring us increasing cloudiness tonight and a 70 percent chance of showers Wednesday and possibly a thunderstorm in the afternoon. With plenty of clouds, Wednesday's high will likely stall out around 70 degrees. More showers and storms, with locally heavy rainfall, are likely overnight Wednesday into Thursday.

But then high pressure returns, forecasters said. Thursday and Friday still look sunny, with seasonable highs near 80 degrees. As that high moves offshore, we'll fall under the return flow off the water, with warmer, more humid conditions for the weekend. Look for highs in the mid-80s, with a 30 percent chance of showers and thunderstorms.  AC weather again.

(SUN PHOTO: Andre F. Chung, at Assateague, 2005)