The usual script for a summer day in Washington, with its stickiness and showers, took on greater menace Monday evening, as a tornado warning was issued for part of the area, and photos of what appeared to be a funnel cloud began showing up on the Internet.

About 7:30 p.m., the National Weather Service said that a thunderstorm capable of producing a tornado was moving through parts of Prince George’s County.

As the storm made its way through the Waldorf area, several people called the Prince George’s 911 center to report a funnel cloud on the ground, said fire department spokesman Mark E. Brady.

However, he said, no damage or injuries were reported.

Whether or not a tornado touched down, Monday seemed a stormy, steamy start to July. It rained hard in several spots, and menacing gray skies alternated with periods of bright sunshine. At ReaganNational Airport, more than half an inch of rain fell between 10 and 11 a.m.

The new month thus began much as the old one had ended. Tropical moisture was surging north along the East Coast. A total of 3.37 inches of rain fell at National in June’s last four days.

June was also a month in which six tornadoes were confirmed in Maryland.