Forecast: High near 91, rain likely

Heat index as high as 100

The National Weather Service was calling for Monday to be mostly cloudy in the Baltimore area, with a high near 91 degrees and calm winds becoming easterly around 6 miles per hour. Heat index values will be as high as 100. Showers and thunderstorms are likely, mainly after noon. The chance of precipitation is 70 percent. Rainfall amounts may range from a quarter of an inch to half an inch.

Monday night was expected to be mostly cloudy, with a low around 74 degrees and southeast winds around 5 miles per hour becoming calm. Showers and thunderstorms are likely, mainly before 9 p.m. The chance of precipitation is 70 percent.

With storms in the forecast, a "hazardous weather outlook" was issued for much of Maryland for Monday. Forecasters warn that numerous thunderstorms will develop by late morning and continue through the evening. These thunderstorms will contain heavy rainfall and potentially could produce flash flooding. The stronger storms also will pose a damaging wind gust threat.

Tuesday is expected to be sunny, with a high near 94 degrees and northwest winds between 8 and 13 miles per hour. Tuesday night is expected to be mostly clear, with a low around 72 and west winds of 5 to 7 miles per hour.