June Bacon-Bercey, who by many accounts became the first African-American woman to deliver the weather on television as a trained meteorologist, died on July 3 at a care facility in Burlingame, Calif., her family announced recently. She was 90.

Her daughter Dail St. Claire said the cause was frontotemporal dementia.

Ms. Bacon-Bercey had worked as a meteorologist at WRC-TV in Washington — though without delivering weather forecasts on the air — when she was hired in 1971 to be a reporter for an NBC affiliate in Buffalo, N.Y., WGR-TV (today WGRZ).

She became an on-air meteorologist a year later, after the station’s weather anchor was arrested and charged with robbing a bank to pay off gambling debts.

“All hell broke loose at the station when our weather guy robbed the bank, and they needed someone who was there to fill in for the day,” Ms. Bacon-Bercey was quoted as saying by The San Francisco Chronicle in 2000. “I already knew from my calculations that there was going to be a heat wave. When the heat wave hit the next day, the job was mine.”