Definition of Blizzard
A blizzard is a severe meteorological event that arises in winter, defined by strong, gusty winds, substantial snowfall, and significantly diminished visibility due to the snow being swept about by the wind. The resultant conditions from these storms may disrupt transportation and infrastructure, and pose severe threats to human health and well-being.
Blizzard Formation
The formation of blizzards usually takes place when a
low-pressure system interacts with cold air. This interaction leads to the freezing of atmospheric moisture, which descends as snow. This scenario of intense snowfall coupled with potent winds generates the perilous conditions related to blizzards, including drifting snow and severely reduced visibility.
Blizzard Criteria
For a winter storm to be officially designated as a blizzard, it needs to fulfill certain requirements. These include wind gusts that are sustained or frequently reach speeds of
35 mph (56 km/h) or more, snowfall that diminishes visibility to less than
0.25 miles (0.4 km) , and the persistence of these conditions for a minimum duration of
3 hours.
Blizzard Impacts
The consequences of blizzards are diverse and wide-ranging, affecting individuals, communities, infrastructure, and the natural environment. They may lead to power outages, interrupt transportation systems, and necessitate the shutdown of schools and businesses. Blizzards also present dangers to human health, including conditions related to extreme cold and wind chills, namely hypothermia and frostbite.
Blizzard Safety and Preparedness
Preparation for a blizzard involves staying updated on the weather forecast, acquiring emergency supplies, and devising a strategy to cope with possible power outages and other disruptions. During a blizzard, the utmost priority is to remain indoors, refrain from traveling, and take measures to protect oneself from the harsh cold to lessen the possibility of harm or sickness.
Blizzard Research and Prediction
Blizzards are the subject of in-depth research by meteorologists and scientists to gain a deeper understanding of their genesis, characteristics, and potential effects. Through the utilization of advanced technology - encompassing weather radar, satellite imagery, and numerical weather prediction models - forecasting and warning systems for blizzards have been significantly enhanced. This progress is crucial in reducing damage and saving lives during these extreme winter events.
Updated: May 19, 2023
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