This is the Północny zachód icon for Windows 10. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.
It's a sign to point to the direction known as North West. The outer arrow shape is pointing diagonally to the upper left, similar to the position of 10 on a clock. There are the letters NW inside the arrow shape.