This bug was added for those who open BBC Weather in a rush to hide the actual page they were looking at before. The hurricane news make it look more plausible that you were looking at something interesting on the weather page.
Given the chronological proximity to the real hurricane force winds in the US right now, seems fair to me to assume someone at the weather data source was testing how these values might propagate/display and the test values escaped containment?
It's still showing hurricane force winds.<p>I guess they've decided it's better to show the correct forecast data + bad wind data than take down the page entirely.