Residents of Omaha, Nebraska, jokingly claim their city has a forcefield called the Oma-dome protecting it from snowstorms. The Oma-dome was invoked last month after predicted snow again failed to appear.
Some of the Oma-dome legend is confirmation bias: every time forecast snow does not arrive, the story gets another boost. But there is something else happening too. Snowfall has been measured in the greater Omaha area since 1871, and the heaviest falls were all before 1966.
