5:55 p.m. update: The tornado watch has been canceled for Central Maryland.
The National Weather Service issued a tornado watch across most of Maryland on Thursday until 10 p.m.
Thunderstorms are again likely in the afternoon, possibly turning severe. The Storm Prediction Center cautioned of several tornadoes possible to form, with other risks of wind gusts up to 70 mph and hail up to 1.5 inches in diameter.
The tornado watch stretches from Washington County in the west to the upper Eastern Shore in Maryland and Delaware, and from Southern Maryland up through eastern Pennsylvania and New Jersey.
Clouds were keeping temperatures in the 80s, well below forecast highs in the mid-90s, in the Baltimore area Thursday afternoon.
Temperatures reached 84 degrees at Baltimore-Washington International Thurgood Marshall Airport at 1 p.m. Thursday. National Weather Service forecasters had called for the heat index to top 100 degrees.
Humidity was high, with a dew point of 71 at BWI.
Friday could still be uncomfortably hot for many. Highs are forecast around 90 degrees with dew points in the upper 60s and more storm chances.
The weekend is forecast to drop into the mid- to upper-80s with more humidity and thunderstorm chances.