key term - Blizzard

Definition

A blizzard is a severe snowstorm characterized by strong sustained winds of at least 35 mph, significant snowfall, and low visibility often less than a quarter mile for an extended period of time, typically three hours or more. These extreme weather conditions can cause dangerous travel conditions, disrupt daily life, and pose serious risks to health and safety due to cold exposure.

5 Must Know Facts For Your Next Test

1. Blizzards can occur when a cold front moves into an area with moist air, resulting in heavy snowfall combined with strong winds.
2. The combination of low visibility and wind can create whiteout conditions, making it nearly impossible to see anything outside.
3. Blizzards can cause severe disruptions to transportation systems, leading to flight cancellations and road closures due to hazardous conditions.
4. Prolonged exposure during a blizzard can lead to hypothermia or frostbite, making it essential for individuals to stay indoors and keep warm.
5. The Northeast United States and the Great Plains are particularly prone to blizzards due to their geographical features and climatic conditions.

Review Questions

• How do the characteristics of a blizzard differentiate it from other winter weather events?
  • Blizzards are defined by their specific combination of strong winds of at least 35 mph, significant snowfall, and reduced visibility lasting for three hours or more. This sets them apart from other winter weather events such as snow squalls, which are short-lived but intense. The sustained winds in a blizzard create hazardous conditions that are not present in lighter snow events or mere cold weather, making blizzards particularly dangerous.
• What are the impacts of blizzards on infrastructure and emergency services in affected regions?
  • Blizzards can lead to substantial disruptions in infrastructure, such as blocked roads, downed power lines, and delayed public transport. Emergency services may become overwhelmed as they attempt to respond to accidents or assist stranded individuals. The inability to maintain normal operations can also hinder the delivery of essential services like healthcare and emergency response during these severe weather events.
• Evaluate the social and economic implications of frequent blizzards in regions that are highly susceptible to such storms.
  • Regions that experience frequent blizzards often face significant social and economic challenges due to repeated disruptions in daily life and commerce. The costs associated with snow removal, property damage, and lost productivity can strain local economies. Furthermore, communities may experience social impacts such as increased isolation during severe weather events and heightened public health risks due to cold exposure. Over time, these factors can lead to shifts in population as residents seek more temperate living conditions.

Related terms

Snow Squall: A brief but intense period of heavy snowfall that can cause sudden reductions in visibility and significant accumulations of snow.

Wind Chill: The apparent temperature felt on exposed skin due to the combination of air temperature and wind speed, which can lead to increased risk of frostbite and hypothermia during blizzard conditions.

Winter Storm Warning: A notification issued by weather authorities when severe winter weather is expected, including heavy snowfall, blizzards, or ice storms, prompting the need for preparedness.