Dust storm or sandstorm

Region/Country	Description
US	A severe weather condition characterized by strong winds and dust-filled air over an extensive area. Strong winds over dry ground, that has little or no vegetation, can lift particles of dust or sand into the air. These airborne particles can reduce visibility, cause respiratory problems, and have an abrasive affect on machinery. A concentration reducing the visibility to ¼ mile or less often poses hazards for travelers.
CA	A warning is generally issued only in the Prairie Provinces when blowing dust caused by high winds is expected to reduce visibility to one kilometre or less for one hour or more. Dust can impair breathing for people and animals, and make travel hazardous.

Region/Country

Description

A severe weather condition characterized by strong winds and dust-filled air over an extensive area.
Strong winds over dry ground, that has little or no vegetation, can lift particles of dust or sand into the air. These airborne particles can reduce visibility, cause respiratory problems, and have an abrasive affect on machinery. A concentration reducing the visibility to ¼ mile or less often poses hazards for travelers.

A warning is generally issued only in the Prairie Provinces when blowing dust caused by high winds is expected to reduce visibility to one kilometre or less for one hour or more. Dust can impair breathing for people and animals, and make travel hazardous.