Rain and snow showers this morning changing to all rain for the afternoon. High 42F. Winds ESE at 5 to 10 mph. Chance of rain 100%.. Chad Turner of Stellar Adventures takes newbies and experienced riders on guided ATV tours of the Arizona desert. Hikers along Tom’s Thumb Trail in Scottsdale, Ariz., stop to take in the view. (Amy Bertrand/St. Louis Post-Dispatch/TNS) Chad Turner of Stellar Adventures takes newbies and experienced riders on guided ATV tours of the Arizona desert. Hikers along Tom’s Thumb Trail in Scottsdale, Ariz., stop to take in the view. (Amy Bertrand/St. Louis Post-Dispatch/TNS) SCOTTSDALE, Ariz. — What’s one thing Arizona has that many places do not have this time of year? Sun. And warm weather and cacti and mountains. In short, a desert climate. The Sonoran Desert covers much of the southwestern part of the United States and into Mexico. It’s known for a variety of vegetation including the majestic saguaro (it’s the only place in the world it grows in the wild), prickly pear and organ pipe cactus. In Scottsdale, a favorite vacation destination known for its golf courses and spas, I set out to explore the desert. Apparently, exploring the desert i...