DISCUSSION: As of earlier yesterday afternoon, there were very strong thunderstorms which developed across Western and Central Spain. However, as a result of there not being much of any westward forcing mechanisms in place, these strong thunderstorms were very slow-moving. The result of their particularly slow propagation rate was the accumulation of incredible amounts of hail as seen in the image below courtesy of @Pedromad. This is not entirely unusual in this part of Europe since Spain often experiences strong storms capable of producing strong winds and comparably-sized hail. This climatological propensity for the development of stronger storms across Central and Eastern Spain during the earlier part of the summer is a consequence of warm fronts associated with incoming low-pressure systems off of the Northeastern Atlantic Ocean being ideally positioned with respect to Central and Eastern Spain. To learn more about other high-impact weather events from across Europe, be sure to click here!