A blizzard is a dangerous winter storm defined by several characteristics. Being caught in a blizzard can be fatal.
Criteria of the National Weather Service for a blizzard:
(1) winter storm
(2) large amount of falling or blowing snow
(3) winds > 35 miles per hour
(4) visibility < 0.25 miles ("whiteout")
(5) duration >= 3 hours (an extended period)
A ground blizzard involves a strong wind blowing already fallen snow.
If some of the features are present then the storm may be referred to as a winter storm or a heavy snow.
To read more or access our algorithms and calculators, please log in or register.
Specialty: Emergency Medicine, Critical Care
ICD-10: ,
