let me tell you guys a little something about days like today. two things can happen and they are more/less outlined like this....
1)some storms go through the area earlier in the day and suck a lot of potential energy out of the sky by decreasing the air temperature and reducing the amount of moisture aka humidity in the air. if this happens, the later storms will not be very strong.
2)nothing happens early in the day, the sky becomes charged and then we get tornadoes, large baseball hail and everybody dies.