…SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN DENTON… SOUTHWESTERN COLLIN AND NORTHERN DALLAS COUNTIES UNTIL 545 PM CDT… At 518 PM CDT, Doppler radar was tracking strong thunderstorm outflow winds along a line extending from 6 miles west of Anna to near McKinney to near Allen to near Richardson to Sunnyvale to near Talty. Movement was west at 25 mph.