A shāchénbào (sandstorm) is a severe weather phenomenon common in arid and semi-arid regions—especially northern China, Mongolia, and Central Asia—where strong winds lift large amounts of sand and dust into the air, drastically reducing visibility and air quality. The word combines three characters: shā (sand), chén (dust), and bào (storm or violent outburst), literally meaning 'sand-dust-storm'. It emphasizes both the composition (sand + dust) and intensity (storm) of the event.

Sandstorms often occur in spring when dry soil, strong cold fronts, and sparse vegetation combine. They carry health risks—irritating eyes, noses, and lungs—and can disrupt transportation, agriculture, and daily life. In Chinese media and weather reports, shāchénbào is used formally and descriptively, frequently paired with verbs like 遭遇 (to encounter), 引发 (to trigger), or 预警 (weather warning). It’s not used metaphorically; it refers strictly to this physical atmospheric event.