Boston August 21, 2019 8:00 pm Weather Forecast: Tornado Warnings End Wednesday night: Mostly cloudy, patchy fog. Lows in the 60s to around 70. Thursday: Mix of sun and clouds, isolated downpour or storm. Highs in the 80s to near 90. Friday: cooler, drier air. Highs in the 70s. US & World Videos 3:01 Weather: Sunny start to weekend 2:50 Weekend forecast: It's going to be rather splendid in Boston 3:27 Cold start Friday in New England, but a warmup is on the way 2:35 Weather forecast: Cold start Friday, temps warm up in the afternoon 3:05 Drier pattern sticks around New England…but for how long?