John S. Coleman, a co-founder of the Weather Channel, the original meteorologist on ABC’s “Good Morning America” and, later in his career, a vocal climate change skeptic, died on Saturday at Summerlin Hospital Medical Center in Las Vegas. He was 83.

His death was confirmed by his family.

Before it became possible to use mobile phones to check humidity levels and wind speeds by ZIP code on demand, Mr. Coleman pioneered the concept of round-the-clock weather reporting.

He popularized the use of chroma key — better known as green screen — which allowed him to speak against a backdrop of ever-changing maps and images. Throughout his career his shows included warning systems to allow viewers to prepare for coming storms and incorporated lifestyle segments.

Nearly half of American households now tune in each month to the Weather Channel, which Mr. Coleman helped launch with Frank Batten Sr. in 1982.