ST. LOUIS — Few people expect tornadoes in December, let alone one strong enough to collapse the 11-inch-thick concrete walls of a sprawling, new Amazon warehouse.
But the EF3 tornado that wrecked the facility near Edwardsville, Illinois, last month — one of several twisters that caused widespread damage in six states and more than 90 deaths — could be a sign of things to come.
While most people associate intense tornado outbreaks with spring, weather experts say both the timing and location may be changing.
