Hike Tumamoc Hill enough times on a regular schedule and you're bound to get to know other regular hikers. And in the dead of summer, only the most committed make it out for the evening hikes. At about 4:30 p.m. on Monday, near the hottest point of a 107-degree Tucson summer day, the hill was deserted. But of the few who were out there, they all seemed to know – or know about – Taylor Moore.

An AIR climate science team has developed an extended forecast model to provide warning of extreme weather events much earlier than conventional forecasts. An earlier warning could give people more time to prepare – or escape.

There are small but subtle changes that take place in Southern Arizona's climate before our yearly monsoon rains start.