Severe-Weather Scales
The two canonical U.S. National Weather Service intensity scales for the atmosphere's most violent storms: the Saffir–Simpson Hurricane Wind Scale (5 categories, by 1-minute sustained wind) and the Enhanced Fujita (EF) Scale (6 ratings, by estimated 3-second gust). Every row is read live at build time from OnlyCSharp.Data.Catalogs.EarthScience.WeatherScales. Authored as .razor; rendered to static HTML.
Source: NOAA / National Weather Service — Saffir–Simpson Hurricane Wind Scale (National Hurricane Center) and the Enhanced Fujita Scale. Works of the U.S. Government, in the PUBLIC DOMAIN (17 U.S.C. § 105). License / dedication proof: https://www.weather.gov/disclaimer (NWS states its content is in the public domain; attribution not required). We cite anyway; the citation is the proof we owed no credit.
Saffir–Simpson Hurricane Wind Scale
| Category | Sustained wind | Severity | NWS damage descriptor |
|---|---|---|---|
| Category 1 | 74–95 mph | — | Very dangerous winds will produce some damage |
| Category 2 | 96–110 mph | — | Extremely dangerous winds will cause extensive damage |
| Category 3 | 111–129 mph | Major | Devastating damage will occur |
| Category 4 | 130–156 mph | Major | Catastrophic damage will occur |
| Category 5 | 157+ mph | Major | Catastrophic damage will occur |
Enhanced Fujita (EF) Tornado Scale
| Rating | Estimated 3-second gust |
|---|---|
| EF0 | 65–85 mph |
| EF1 | 86–110 mph |
| EF2 | 111–135 mph |
| EF3 | 136–165 mph |
| EF4 | 166–200 mph |
| EF5 | 201+ mph |