In fairness, Weather.com does forecast a 30 percent chance of thunderstorms tomorrow night, but I was told by convention organizers just yesterday that if it were just an issue of rain, the show would go on as planned. Alas, the fractional threat of thunderstorms — and more alarmingly for Team Obama, empty seats — forced the DNC to pull the plug:

President Obama’s acceptance speech has been moved from the Bank of America Stadium to the Time Warner Cable Arena, Democrats announced Wednesday. Democrats blamed “severe weather forecasts” for the move to the smaller, indoor arena from the larger outdoor stadium. Thunderstorms are forecast on Thursday for Charlotte. The announcement comes after Obama campaign officials insisted the speech would go forward in the stadium “rain or shine.”