Last week, Clowney was honored by her neighbors, family, and community leaders at her church, St. Martin de Porres. More than 100 people attended.
Clowney, a widow who doesn't like to discuss her age, said she knew every person living on the block of 70 homes between Susquehanna Avenue and Dauphin Street.
"I can tell you who lives in each house," Clowney said.
And her neighbors know her for her activism, her generosity, and the whistle she blows when calling for them to participate in street cleanups several times a year.
"Miss Helen is one of the icons of this block," said neighbor Paul Richards. "She's going to be sorely missed as our block captain."
When it's time to clean up the block, "she gets out that whistle," Richards said. "She goes from the top of the block, blowing that whistle, and she has a few of the kids knocking on doors."
When the work is done, she gives everyone a treat, Richards said, usually a pretzel and water ice.
He and others said Clowney is known for organizing the street's annual Memorial Day block party.
Another neighbor, Bernice Hines, also recalled Clowney blowing her whistle to call out neighbors for projects.
"She used the whistle to say, 'All you lazy birds, get out here. You're a part of this block. Show your commitment to it,' " Hines said.
Asked what she liked about being a block captain, Clowney said, "It just makes me feel good inside. When we have affairs in the block, we never have any trouble. Everybody is just family."
Clowney noted that she has a cocaptain, Willie Mae Clark, who has worked with her for many years. "She's a very good person, and I think she should be recognized, too," Clowney said.
Clowney, a graduate of Philadelphia High School for Girls who spent her life as a stay-at-home mother with one child, said she enjoyed walking children to school and back home again.
Among her other interests, she said, she enjoys spending time at the Martin Luther King Older Adult Center on Cecil B. Moore Avenue, where she leads a poetry class.
Clowney also likes to cut a few steps doing line dances. She said she enjoys doing the electric slide and the cha-cha slide. "The Baltimore - that's my favorite. They named that one after me," she quipped. "I taught my granddaughter, my son-in-law, and my daughter."
Her son-in-law, Tony Leonard, said Clowney goes to meetings with elected officials in the community and attends monthly meetings with police at the 22d District at 17th Street and Montgomery Avenue. She describes Philadelphia Sheriff Jewell Williams and City Council President Darrell L. Clarke, who grew up in the neighborhood, as "two of my kids."
She is pleased that a neighbor, Jannette Robinson, will take over as block captain. Clowney said the street also has three junior block captains, two boys and a girl.
Clowney said she was stepping down because "I thought it was time enough for someone else to step up to the plate and take my place after 50 years."
Hines, her neighbor, stood on her front steps and looked down proudly.
"You see this block and the way it looks. It looks this way because of her," Hines said. "She has worked hard to keep it intact."