A landspout is a tornado that does not descend from a mesocyclone in a supercell but forms from the ground up. Pre-existing surface vorticity (from wind convergence) is stretched vertically beneath a growing convective tower.
They are generally weaker than supercell tornadoes (EF0–EF1), short-lived, and harder to detect by radar. In Spain, they occur with relative frequency in the Ebro Valley, the Meseta, and Mediterranean coasts, especially in sea breeze convergence situations.