Temperatures could approach 90 degrees Thursday afternoon, potentially helping to fuel afternoon storms.
Overnight lows were forecast only in the upper 60s to lower 70s, expected to rise well into the 80s by midday. Baltimore has yet to see a 90-degree day this year.
About a 30-40 percent chance of isolated storms is expected in the afternoon and evening hours. Mostly cloudy skies are forecast for much of the day.
More sunshine and highs in the mid-80s are forecast Friday, with another slight chance of afternoon storms.
More heat and storm potential are forecast for the weekend. Clouds and highs in the mid-80s are forecast Saturday. Storms are likely Sunday as colder air pushes into the region, with highs in the lower 80s before cooling into the 60s Monday.