 To WTOP meteorologist Mike Steneford. A severe thunderstorm watch in effect until 11 o'clock this evening. Over the next several hours, more heat and humidity, and we're going to see some scattered thunderstorms rolling through the region. Any storms that do develop may produce damaging winds. Also, some hail and isolated tornadoes are not out of the question. Storms will end later tonight. Overnight lows will be in the 60s. Mike Steneford, WTOP News.