Introduction:

As winter approaches, the weather turns cold and snowy, often bringing storms that disrupt our daily routines. Some might use the terms “blizzard” and “snowstorm” interchangeably in describing these winter storms, but there are distinct differences between them. In this article, we will explore the characteristics of each one so you can better understand the phenomenon occurring when snow and wind combine.

Blizzard:

A blizzard is an extreme weather event characterized by three key conditions that must occur simultaneously. According to the National Weather Service (NWS), a blizzard comprises of:

1. Heavy or blowing snow that reduces visibility: A blizzard requires that visibility is reduced to less than a quarter-mile for a prolonged period (at least 3 hours). This can be caused by falling snow or snow that’s picked up by strong winds.

2. Sustained winds or gusts reaching 35 mph (56 km/h): Blizzards involve intense winds capable of downing trees and powerlines, causing damage to infrastructure and vehicles.

3. Duration: This powerful combination of snow and wind must persist for at least three hours. Anything under that duration would not fit the criteria of a blizzard.

In addition, blizzards can cause numerous life-threatening risks, including hypothermia from extreme cold temperatures, frostbite due to wind chill, low visibility increasing car accident risks during whiteout events, and even structural collapses from excessive snow weight on roofs.

Snowstorm:

A snowstorm refers to any event where significant amounts of snowfall accumulate over a short period. Snowstorms do not necessarily require strong winds or severely limited visibility. They are defined mainly by their precipitation totals and often lead to disruption in transportation, closures of businesses and schools, and posing health threats like slips or falls on icy surfaces.

Generally speaking, a snowstorm is considered significant if six inches of snow or more accumulate over a 12-hour period, or eight inches or more within 24 hours. The severity and impact of a snowstorm are determined by factors such as temperature, snowfall rate, and duration.

Comparing Blizzards and Snowstorms:

The main differences between a blizzard and a snowstorm are the intensity of the wind and visibility requirements. While both events involve heavy snowfall, a blizzard must include strong winds that create limited visibility for an extended duration. Snowstorms can be more mild and might be characterized by steady, moderate snowfall that creates accumulation and inconvenience without the additional dangerous effects of strong winds.

Conclusion:

In distinguishing between blizzards and snowstorms, it’s essential to understand that blizzards require specific criteria to be met: heavy or blowing snow with significantly reduced visibility, sustained winds of at least 35 mph, and a duration of no less than three hours. Snowstorms, on the other hand, center around the precipitation totals and can vary greatly in terms of wind strength and impact on visibility. By understanding these differences, you will be better informed when facing the challenges and hazards each weather event presents during colder months. Stay safe out there!