Russell Lewis http://wrti.org en Tornado Tech: What If Dorothy Had A Smartphone? http://wrti.org/post/tornado-tech-what-if-dorothy-had-smartphone For many, the only way they learn a tornado is approaching are sirens. In the spring and summer, tornado sirens go off a lot more when twisters roar across Alabama, which has been hit by 900 since 2000, accounting for a quarter of all U.S. Tue, 13 Mar 2012 20:58:00 +0000 Russell Lewis 1395 at http://wrti.org Tornado Tech: What If Dorothy Had A Smartphone?