What does Nesis stand for?
NESIS
| Acronym | Definition |
|---|---|
| NESIS | National Education Statistical Information Systems |
| NESIS | Northeast Snowfall Impact Scale |
What is a Nesis value?
It indicates the relative impact of the snowstorm on people, and is not a measure of a purely physical phenomenon like wind speed. An “NESIS value” is calculated from the area covered, the depth of the snowfall, the population of the area covered, and two constants based on historical experience with large snowstorms.
Is there a scale for a blizzard?
A blizzard is one type of storm that has no scale in which to measure its intensity. A blizzard’s strength is measured by an estimate based off of total snowfall and wind speeds.
What is a Category 5 blizzard?
A Category 5 Extreme ranking is indicated by a numerical score of 18 or higher on the scale. The highest ranking storm on the list is the Great Blizzard of 1978 which scored a value of 39.07. The most recent storm to receive a Category 5 ranking is the January 2016 United States blizzard which scored a value of 20.14.
How do you categorize blizzards?
These storms have large areas of 10 inch snowfall accumulations and greater. NESIS has five categories: Extreme, Crippling, Major, Significant, and Notable….Overview.
| Category | NESIS Value | Description |
|---|---|---|
| 1 | 1—2.499 | Notable |
| 2 | 2.5—3.99 | Significant |
| 3 | 4—5.99 | Major |
| 4 | 6—9.99 | Crippling |
What is the longest blizzard on record?
The 1972 Iran blizzard, which caused 4,000 reported deaths, was the deadliest blizzard in recorded history. Dropping as much as 26 feet (7.9 m) of snow, it completely covered 200 villages. After a snowfall lasting nearly a week, an area the size of Wisconsin was entirely buried in snow.
What qualifies a storm as a blizzard?
The National Weather Service defines a blizzard as a storm with large amounts of snow or blowing snow, winds greater than 35 mph (56 kph), and visibility of less than ¼ mile (0.4 km) for at least three hours. Travel becomes dangerous when the blowing snow causes whiteout conditions and sky and ground look white.
What is a snow tornado called?
Thundersnow, also known as a winter thunderstorm or a thundersnowstorm, is an unusual kind of thunderstorm with snow falling as the primary precipitation instead of rain. It typically falls in regions of strong upward motion within the cold sector of an extratropical cyclone.
