right|thumb|250px|Cierzo wind blowing in Zaragoza. The cierzo is a strong, dry and usually cold wind that blows from the North or Northwest through the regions of Aragon, La Rioja and Navarra in the Ebro valley in Spain. It takes place when there is an anticyclone in the Bay of Biscay and a low-pressure area in the Mediterranean Sea. It is more common in autumn and winter, when larger pressure gradients take place, but a small pressure difference along the Ebro valley is sufficient to initiate it in any season.
right|thumb|250px|Cierzo wind blowing in Zaragoza. The cierzo is a strong, dry and usually cold wind that blows from the North or Northwest through the regions of Aragon, La Rioja and Navarra in the Ebro valley in Spain. It takes place when there is an anticyclone in the Bay of Biscay and a low-pressure area in the Mediterranean Sea. It is more common in autumn and winter, when larger pressure gradients take place, but a small pressure difference along the Ebro valley is sufficient to initiate it in any season.
The cierzo has been known since ancient times, with its name stemming from the Latin word circius, which probably came from an Iberian word. In the 2nd century BC, Cato the Elder described the cierzo as "a wind that fills your mouth and tumbles waggons and armed men."
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).