The WPIAL has postponed the team track and field semifinals to Wednesday because of unfavorable weather Tuesday.

Sites and times remain the same. The winner from each semifinal site advances to the WPIAL team finals May 6 at West Mifflin.

The North Allegheny girls (Class 3A) and Quaker Valley girls (2A) are each trying to win a fourth straight WPIAL team championship. The Butler boys in Class 3A hope to repeat and make it four district titles in the past five seasons. The Quaker Valley boys are the reigning Class 2A champions.

The WPIAL did not postpone boys tennis matches scheduled for Tuesday. The WPIAL did move the start times for some matches earlier.

WPIAL team track

Wednesday’s semifinals

Class 3A boys

At North Allegheny, 3 p.m.

North Allegheny, Baldwin, Knoch, New Castle

At Norwin, 3 p.m.

Norwin, Plum, Ringgold

At Butler, 3 p.m.

Butler, Kiski Area, Moon, Penn-Trafford

At South Fayette, 2:30 p.m.

Connellsville, Franklin Regional, Mt. Lebanon, Trinity

Class 3A girls

At North Allegheny, 3 p.m.

North Allegheny, Blackhawk, Hempfield, Knoch, Upper St. Clair

At Norwin, 3 p.m.

Norwin, Laurel Highlands, Pine-Richland, Plum

At Butler, 3 p.m.

Butler, Beaver, Belle Vernon, Kiski Area, Moon

At South Fayette, 2:30 p.m.

South Fayette, Franklin Regional, Mt. Lebanon, Seneca Valley

Class 2A boys

At Shenango, 3 p.m.

Shenango, New Brighton, Riverview, Shady Side Academy

At Greensburg Central Catholic, 3 p.m.

Greensburg Central Catholic, Apollo-Ridge, Fort Cherry, Mohawk, Trinity Christian

At California, 3 p.m.

California, Beaver, Mt. Pleasant, South Park

At South Side, 3 p.m.

South Side, Quaker Valley, Neighborhood Academy, Waynesburg Central

Class 2A girls

At Shenango, 3 p.m.

Shenango, North Catholic, Our Lady of the Sacred Heart, Shady Side Academy

At Greensburg Central Catholic, 3 p.m.

Greensburg Central Catholic, Fort Cherry, Laurel, Trinity Christian

At California, 3 p.m.

California, Carlynton, Freeport, Southmoreland

At South Side, 3 p.m.

South Side, Brownsville, Quaker Valley, Winchester Thurston