* WHAT...East winds 20 to 30 mph with gusts up to 45 mph expected. * WHERE...Portions of east Tennessee and southwest Virginia. * WHEN...Until 8 AM EDT /7 AM CDT/ Sunday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * ADDITIONAL DETAILS...Localized gusts up to 50 mph possible.