Don't normally do severe thunderstorm watches here but since it is early in the season and since two major metro areas (Oklahoma City and Wichita) and it is close to a third (Tulsa), I'm going ahead.
A severe thunderstorm watch means to watch for large hail (≥1") and or damaging winds (≥58mph).
Here is the two warnings that are in effect. The first is a severe thunderstorm warning out just southwest of Wichita until 3:30pm. This storm is moving in the general direction of the Wichita/Sedgwick Co. area and has produced two reports of hail between 3/4" and 1". Radar at 3:16pm:
The second looks like it has large hail and damaging wind potential as is moves NE to ENE through northern Oklahoma.
Here is the severe thunderstorm watch until 10pm.