Norman office put this out on their FB page.
2:15 PM - our weather balloon data shows the cap (a layer of warm air aloft that can delay/prevent storms) is still in place over central OK, but it appears the cap is likely weaker over western OK. This is where we expect storms to possibly develop after 4pm. Again, most people will not see a storm, but if a storm forms it will likely be severe. A tornado watch will be issued for parts of our area by 3:30 PM. Stay alert!