Fog and muggy heat start Sunday in Pittsburgh before thunderstorms become possible late. A brief dry period follows early Monday.

Pittsburgh gets a sunny Friday before heavy rain Saturday and a potential severe-storm threat Sunday.

Pittsburgh warms to 82 Thursday before afternoon showers and thunderstorms arrive. Friday looks sunny, but a wetter Saturday is already lining up.

Pittsburgh reaches 87 Wednesday before thunderstorms roll in tonight. Stronger storms are possible north of the city, followed by a rainy Thursday.

Pittsburgh gets a sunny, comfortable Labor Day before temperatures rise and thunderstorms return Wednesday night. Thursday could bring heavy rain and isolated flooding.

Sunny skies and mild temperatures are lined up for Pittsburgh through Labor Day. Then the heat builds, with thunderstorms likely Wednesday night into Thursday.

Pittsburgh starts Saturday foggy and damp, with scattered showers and thunderstorms possible through the afternoon. Sunday and Labor Day turn sunny and seasonable.

A mostly cloudy, humid morning in Pittsburgh will give way to afternoon thunderstorms Friday, with hail and damaging wind gusts possible. Sunny weather returns Sunday and Labor Day.

Pittsburgh will feel like 102 degrees Thursday as thunderstorms move through. A cooler, sunnier weekend follows.

Pittsburgh’s heat index could hit 102 Wednesday and Thursday as storm chances build. Cooler, calmer weather is expected by the weekend.

Pittsburgh heats up to 93 degrees Wednesday, but storms are lining up for late Wednesday and Thursday. The weekend should bring cooler temperatures and more manageable outdoor conditions.

Fulton, Allderdice and Perry students learn from home Sept. 1-3 as forecasted heat trips the district's threshold.

Morning showers open the week in Pittsburgh before temperatures surge into the 90s. Storm chances rise late Wednesday and Thursday.