Another chilly June morning, blessed by the silence of idle air conditioners.

It was 52 degrees at dawn on the WeatherDeck in Cockeysville, and 52 degrees also at Baltimore-Washington International Marshall Airport down in Linthicum. That was not a record for the city's official weather station, but it was a nice run at one. The record low for a June 18 in Baltimore is 48 degrees, set back in 1959. We still haven't touched 80 today - only the third day this month that's happened. It was 62 this morning at The Sun's weather station at Calvert & Centre streets.

The forecast low for tonight is 57 degrees, as temperatures begin to warm back toward more seasonable readings this week.

All this cool air is being delivered by a big low rotating north of Lake Ontario. That's dragging cool air in from the north and west, along with little disturbances that, with some solar heating, may trigger some showers or thunderstorms - a few perhaps with hail - as they roll by us. 

So far, however, the coast is clear. Just some cumulus clouds and patches of blue, clearly visible in the satellite image below.

They're calling for more of the same Thursday and Friday, with a risk of showers both days, and highs near 80 degrees. Saturday looks perfect for a wedding - sunny and 83 - but showers and thunderstorms become a risk again for Sunday.