Dust picked up locally from the surface of the earth and blown about in clouds or sheets. It is classed as a lithometeor and is encoded BLDU as an obstruction to vision in an aviation weather observat [..]

Dust that is raised by the wind to moderate heights above the ground to a degree that horizontal visibility decreases to less than seven miles. Visibilities of 1/8 mile or less over a widespread area [..]

Dust picked up locally from the surface of the earth and blown about in clouds or sheets. Common during the North American Monsoon because of thunderstorm outflows like a dust storm or haboob during t [..]

Wind-driven dust that significantly reduces surface visibility to less than 7 miles (11 kilometers).

A type of lithometeor composed of dust particles picked up locally from the surface and blown about in clouds or sheets.

Dust that is raised by the wind, to moderate heights above the ground. Visibility at eye level may be reduced to 1 km

dust that is raised by the wind

Dust that is raised by the wind to heights of six feet or greater. It is reported as "BLDU" in an observation and on the METAR.

Dust

Dust that is raised by the wind to heights of six feet or greater. It is reported as “BLDU” in an observation and on the METAR.