YAML

Typhoon Classification (Intensity and Size) - YAML

The Japan Meteorological Agency classifies typhoon intensity and size separately as indicators of approximate strength. 'Intensity' is classified as 'Strong' at 33 m/s or above, 'Very Strong' at 44 m/s or above, and 'Violent' at 54 m/s or above. 'Size' is classified as 'Large' when the radius of the gale-force wind area (15 m/s or above) is 500 km or more, and 'Very Large' at 800 km or more. These classifications are combined to create expressions like 'Large and Strong Typhoon' and are widely used in disaster prevention information.

JMA typhoon meteorology disaster prevention wind speed gale-force wind area storm wind area

- code: "intensity-strong"
  slug: "intensity-strong"
  name: "Strong"
  description: "Intensity category for typhoons with maximum wind speeds of 33-43 m/s (64-84 knots)."
  categoryType: "Intensity"
  windSpeedMinMps: 33
  windSpeedMaxMps: 43.9
  windSpeedMinKt: 64
  windSpeedMaxKt: 84
- code: "intensity-very-strong"
  slug: "intensity-very-strong"
  name: "Very Strong"
  description: "Intensity category for typhoons with maximum wind speeds of 44-53 m/s (85-104 knots)."
  categoryType: "Intensity"
  windSpeedMinMps: 44
  windSpeedMaxMps: 53.9
  windSpeedMinKt: 85
  windSpeedMaxKt: 104
- code: "intensity-violent"
  slug: "intensity-violent"
  name: "Violent"
  description: "Intensity category for typhoons with maximum wind speeds of 54 m/s (105 knots) or higher."
  categoryType: "Intensity"
  windSpeedMinMps: 54
  windSpeedMaxMps: null
  windSpeedMinKt: 105
  windSpeedMaxKt: null
- code: "size-large"
  slug: "size-large"
  name: "Large"
  description: "Size category for typhoons with a gale-force wind area (15 m/s or higher) radius of 500-799 km."
  categoryType: "Size"
  windRadiusMinKm: 500
  windRadiusMaxKm: 799
  windSpeedThresholdMps: 15
- code: "size-very-large"
  slug: "size-very-large"
  name: "Very Large"
  description: "Size category for typhoons with a gale-force wind area (15 m/s or higher) radius of 800 km or more."
  categoryType: "Size"
  windRadiusMinKm: 800
  windRadiusMaxKm: null
  windSpeedThresholdMps: 15