List of major snow and ice events in the United States
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The following is a list of major snow and ice events in the United States that have caused noteworthy damage and destruction in their wake. The categories presented below are not used to measure the strength of a storm, but are rather indicators of how severely the snowfall affected the population in the storm's path. Some information such as snowfall amounts or lowest pressure may be unavailable due to a lack of documentation. Winter storms can produce both ice and snow, but are usually more notable in one of these two categories. The "Maximum accumulation" sections reflect the more notable category which is represented in inches of snow unless otherwise stated. Only category 1 and higher storms as defined by their regional snowfall index are included here.
- Note: A blizzard is defined as having sustained winds of at least 35 mph for three hours or more.
Category | RSI value | Description | |||
Five | 18.0+ | Extreme | |||
Four | 10–18 | Crippling | |||
Three | 6–10 | Major | |||
Two | 3–6 | Significant | |||
One | 1–3 | Notable | |||
Zero | <1.0 | Nuisance |
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