…SIGNIFICANT WEATHER ADVISORY FOR JOHNSON…DENTON…NORTHEASTERN BOSQUE…TARRANT…HILL…ELLIS…COLLIN…EASTERN COOKE…DALLAS… GRAYSON…NAVARRO AND WESTERN FANNIN COUNTIES UNTIL 915 PM CST… At 755 PM CST, Doppler radar was tracking strong thunderstorms along a line extending from near Callisburg to 7 miles northeast of Meridian. Movement was east at 35 mph.