This icon is a part of a collection of Wiatr prędkości 98-102 flat icons produced by Icons8. Icons follow the guidelines of iOS, Windows, and Android and are designed by a single designer, guaranteeing the consistent quality. Both PNG and vector are available.
This looks like a circle with a line extending from the left side of the circle. At the end of the line, there's two triangles connected to the top side of the line. The triangles are connected on their sides, not their corners.