* WHAT...Southwest winds 20 to 30 mph with gusts up to 45 mph expected. * WHERE...Portions of northwestern Arizona, southeastern California, and southern Nevada. * WHEN...From 2 PM PDT / MST to 11 PM PDT / MST Tuesday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.