Weathercaster and TV personality Al Roker is going for a world record, and it will take him at least 34 hours to pull it off.

"To make history, you've got to want it. To make history, you've got to ride the rainbow and feel the polar vortex."

The "Today" show weatherman is attempting the longest uninterrupted weather broadcast in history — nicknamed the "Rokerthon."

Roker has made it known this stunt is aimed at raising money for the United Service Organizations, or USO, through crowdsourcing site CrowdRise.

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But Roker's true inspiration for attempting what is undoubtedly a grueling feat is the person he's trying to beat — Norwegian meteorologist Eli Kari Gjengedal. (Video via TV2)

Gjengedal spent more than 33 hours on-air back in September, surpassing the previous record of 24 hours. Roker admitted to The Daily Beast his attempt started out as a joke after reporting on Gjengedal's broadcast. (Video via BBC)

"I kind of flippantly said, ‘I can do that. Sure, I’ll do that.’… And everybody said, ‘Wow. You’re gonna do that?’ And I said, ‘Yeah, I guess so. Why not? It could be fun. It’s a challenge.’”

Roker talked to Gjengedal during the "Today" show Wednesday about what inspired her to make the record-breaking attempt.

ELI KARI GJENGEDAL VIA NBC: "One, I wanted to have focus on weather because it is so important. And the second thing was Norwegian people are so into weather, so I was thinking that we have to have that record."

Of course, what's a Guinness World Record-attempt without a few rules? NBC reports Roker can take a five-minute break every 60 minutes, but he will have to talk about weather the entire time (outside of breaks), and two independent witnesses must be there at all times.

Roker's broadcast, which began at 10 p.m. ET Wednesday, is streaming live online. For more information, visit Today.com/Rokerthon.

This video includes images from Getty Images.