Brief
Snopes finds Yellowstone Lake water‑level claim is satire
The alleged 11‑foot overnight drop in Yellowstone Lake water levels was traced to a satirical post, not real data.
By Felo News Desk · Published
Snopes examined a claim that Yellowstone Lake in Wyoming fell 11 feet between September 26 and 27, 2026, and found the story to be a satire.
What happened
The rumor spread on Facebook, X and Threads after a user posted that park rangers noticed docks above the waterline on September 27. The post suggested an underground channel had opened, draining millions of gallons.
What the reports add
Snopes identified the source as the Facebook page Casper Planet, whose "About" section labels its content as satire and states that names and locations are fabricated. The page used an AI‑generated image, which Pangram and OpenAI tools flagged as fully synthetic. No reputable news outlet reported the event, and a search of Google, Yahoo and DuckDuckGo returned no corroborating articles.
What was said
Snopes noted that the United States Geological Survey’s water‑level readings at the Yellowstone River inlet showed only an inch‑scale change between 9 a.m. on September 26 and the same time on September 27.
How it came about
The claim originated from Casper Planet’s satirical post, which did not clearly label the specific story as satire, leading some users to share it as fact.
Key facts
- The claim that Yellowstone Lake dropped 11 feet overnight was traced to a satirical Facebook page. (snopes.com)
- USGS water‑level data showed only an inch‑scale change between Sept 26 and Sept 27, 2026. (snopes.com)
- The image used in the claim was identified as AI‑generated by Pangram and OpenAI tools. (snopes.com)
Sources
- [1] snopes.com — originally reported as “Did water levels at Yellowstone Lake drop 11 feet overnight?”
