All phenomena
An advancing wall of dust raised by thunderstorm outflow winds.
16-Bit Take (analogy): A moving dust-wall background that signals a hazardous scene.
The science
Air descending from a thunderstorm spreads across the ground and lifts dust into the advancing outflow.
How to spot it
An approaching dust wall is a reason to avoid travel into it. Follow NWS dust-storm driving guidance; never stop in a traffic lane.
Where
Dry regions, including the US Southwest.
Best season
Periods when thunderstorms occur over dry, dusty ground.
- ▸Visibility can fall sharply as the dust arrives.
- ▸Blowing dust makes roads hazardous.
- ▸Haboobs occur especially in dry regions with loose surface material.
Rarity and hazard ratings are informal editorial guides, not measured occurrence rates or official warnings. Local conditions determine actual risk.
Related guides
- Microbursts
Small, intense downdrafts that spread damaging winds outward when they reach the ground.
- SQUALL LINES
Storm formation flight - squadron of thunderstorms marching in military precision
- TROPICAL CYCLONES
Tropical destroyer - ocean-powered spiral of catastrophic winds and water