Jugavoolud on mõne km paksused, kuid pikkus küünib kuni kümnete tuhandete kilomeetriteni ning õhu liikumise kiirus jugavoolu teljes maksimaalselt 700 km/h, tavaliselt aga 100-300 km/h.
A jet stream axis with a wind speed of more than 80 kts is identified by a bold (green) line. An arrowhead is used to indicate wind direction. Wind change bars (double- hatched, light green lines) positioned along a jet stream axis identifies 20 -knot wind speed changes ( see Figure 5-58, High -Level SIGWX Chart Jet S tream —Example).
