WHO 13 meteorologist Jason Parkin reveals Parkinson's diagnosis

Driving the news: Parkin disclosed his diagnosis in a Facebook video last week, which he said helps explain years of unexplained fatigue.

• About a year ago, he noticed his left arm stopped swinging normally when he walked, and last fall he developed a tremor that has sometimes made typing and buttoning clothes difficult.

State of play: Parkin tells Axios that doctors haven’t been able to predict how quickly his Parkinson’s will progress because cases can vary significantly.

• He exercises as much as he can and tries to limit his carbohydrate and sugar intake to help manage the disease.

Zoom in: Forecasting the weather keeps him focused and motivated enough that the disease hasn't generally caused problems at work.

Yes, but: On particularly difficult days, he'll occasionally find a chair and close his eyes for about 20 minutes.

• "The folks at WHO have been very supportive and understanding," Parkin said.

Behind the scenes: Parkin said he initially didn't want his diagnosis to be a distraction, but meeting others with Parkinson's persuaded him that going public could help raise money and support others facing the disease.

Flashback: Parkin is the second member of the WHO weather team this year to publicly disclose a serious neurological diagnosis, following longtime meteorologist Jeriann Ritter’s announcement that she has ALS.

• “In all my years in TV news, I’ve never heard of a situation like the one the NBC affiliate in Des Moines is dealing with,” retired KCCI-TV news director Dave Busiek, a former coworker of Parkin’s, wrote in a column about the two meteorologists.

What's next: Parkin plans to emcee the American Parkinson Disease Association's Iowa Optimism Walk on Sept. 19 at Walker Johnston Park in Urbandale.