derecho
A windstorm characterized by strong, straight-line winds.
Combining all of the above, the Arkansas Valley, Ouachita Mountains, Interior Plateau, and Southwest Appalachian ecoregions have the greatest risk of wind damage from tornadoes and derechos, whereas weakening hurricanes are an important disturbance, especially in the Piedmont ecoregion.
Where it comes from
Learned borrowing from Spanish derecho (“straight”). First used by Gustavus Detlef Hinrichs in 1888, apparently coined to distinguish the winds from tornadoes, which rotate; compare tornado. Doublet of direct.
Adapted from the Wiktionary entry derecho (CC BY-SA 4.0).