North Texas September 13, 2017 5:00 pm Weather Quiz: Heat Capacity NBC 5 Rick Mitchell asks: Which of these options has the highest heat capacity? Wake Up to Something Good 3:15 Attendees on alert at Southlake fest as severe weather threatens North Texas 1:39 Communities clean up after monster tornadoes 0:46 San Marcos Police issue Amber Alert for toddler 2:07 Police looking for murder weapon in Bowie HS shooting 2:10 Southlake's Art in the Square prepares for inclement weather