140 degrees below freezing at 30kft? (Score 1)

"....around 30,000 feet...at that altitude...temperatures of 140 degrees below freezing would kill passengers within minutes." The above, from the article, doesn't sound right. 140 degrees below freezing (assuming fahrenheit) equals a temperature of -108F(-77C), which might be a valid temperature for the tropopause over the tropics, at 50,000ft. But, at 30,000ft, it's more likely that the temperature would be about -50F(-45C), or about 80 degrees below freezing.