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Tempête de neige

Une tempête de neige est un phénomène météorologique hivernal marqué par d’importantes chutes de neige, souvent associées à des vents forts.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

A snowstorm is a winter meteorological phenomenon characterized by significant snowfall, often accompanied by strong winds. It forms when low-pressure systems meet cold air, allowing precipitation to fall as snow. In precise meteorological usage, an intense snowstorm with heavy blowing snow and low visibility is called a blizzard.

Definition

A snowstorm is a winter weather event featuring heavy snowfall. It is typically associated with a low-pressure system and temperatures below freezing.

Formation

Snowstorms form when cold air encounters sufficient moisture to produce snow. The interaction of air masses and atmospheric pressure plays a key role in their development.

Effects and hazards

Snowstorms can reduce visibility, hinder travel, and may be accompanied by blowing snow or ice depending on conditions. More severe episodes can disrupt transportation and power networks.

Blizzard

A blizzard is a more precise and severe type of snowstorm, defined by strong winds, low visibility, and a minimum duration. This distinction is used in North American meteorology, including official Canadian definitions.

Key facts

  • A snowstorm is produced by a significant winter low-pressure system.
  • It occurs when the air is cold enough for precipitation to fall as snow.
  • It can be accompanied by strong winds and last several hours.
  • The term 'blizzard' refers to a very intense snowstorm with blowing snow and severely reduced visibility.
  • In Canada, blizzard has an official meteorological definition distinct from a simple snowstorm.
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Canadian context

Le Canada connaît fréquemment des tempêtes de neige et des blizzards durant l’hiver; le terme est aussi utilisé dans le cadre des définitions météorologiques canadiennes officielles du blizzard.[10]

Frequently asked questions

What is a snowstorm?
It is a winter meteorological phenomenon with significant snowfall, often accompanied by strong winds.
How does a snowstorm form?
It forms when a winter low-pressure system meets a cold air mass, causing precipitation to fall as snow.
What is the difference between a snowstorm and a blizzard?
A blizzard is a more precise and severe snowstorm, with strong winds, low visibility, and prolonged duration.
When do snowstorms most often occur?
They occur mainly between late autumn and early spring.
Is a snowstorm always a blizzard?
No. A snowstorm can be less intense and not meet the wind, visibility, and duration criteria of a blizzard.

References

  1. Wikipédia — https://fr.wikipedia.org/wiki/Temp%C3%AAte_de_neige
    Supports: Définition générale d’une tempête de neige comme phénomène météorologique hivernal lié à une dépression importante.
  2. La langue française — https://www.lalanguefrancaise.com/dictionnaire/definition/tempete-de-neige
    Supports: Définition concise de la tempête de neige comme phénomène météorologique avec fortes chutes de neige.
  3. Gouvernement du Québec — https://www.jeunesse.securitepublique.gouv.qc.ca/jeunes/1re-annee/urgences-et-catastrophes/tempetes-dhiver/
    Supports: Explication simple des tempêtes d’hiver, des vents forts et du blizzard.
  4. The Canadian Encyclopedia — https://www.thecanadianencyclopedia.ca/fr/article/blizzard
    Supports: Définition canadienne du blizzard et critères météorologiques associés.
  5. Battlbox — https://global.battlbox.com/fr/blogs/plein-air/what-is-a-blizzard-understanding-natures-ferocious-winter-storm
    Supports: Critères généraux du blizzard: vents forts, faible visibilité et durée minimale.