Science / Weather / Blizzard: A severe weather condition characterized by low temperatures, winds 35 mph or greater, and sufficient falling and/or blowing snow in the air to frequently reduce visibility to 1/4 mile or less for a duration of at least 3 hours. A severe blizzard is characterized by temperatures near or below 10?‚°F, winds exceeding 45 mph, and visibility reduced by snow to near zero.
Science / Weather / Black Blizzard: A local term for a violent duststorm on the south-central Great Plains that darkens the sky and casts a pall over the land. MORE
Science / Weather / Whiteout: When visibility is near zero due to blizzard conditions or occurs on sunless days when clouds and surface snow seem to blend, erasing the horizon and creating a completely white vista. MORE