National Weather Service United States Department of Commerce

A broad area of moisture will cross the region today, bringing widespread rainfall. The rainfall may be heavy at times. There is a 20% chance of thunderstorms this afternoon, with lightning the main threat.
The first half of May has been quite dry. And, when it has rained, amounts have not been as high as needed to help mitigate the soil moisture deficit being felt by many. The most recent Drought Monitor map (released today, May 21st) shows this with the area of abnormally dry conditions and moderate drought conditions expanding northward over the forecast area. However, the second half of May could end up chipping away at the current overly dry conditions.