## Register: Code Table D-2: Physical quantity kinds

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**URI:** http://codes.wmo.int/common/quantity-kind

WMO No. 306 Vol I.3 Common Code-table D-2, Physical quantity kinds.

## Contents

Name | Notation | Description | Types | Status |
---|---|---|---|---|

Aerodrome maximum wind gust speed | aerodromeMaximumWindGustSpeed | Maximum wind speed in the 10 minute period of observation. It... | space and time quantity kind , quantity kind , Concept | stable |

Aerodrome mean wind direction | aerodromeMeanWindDirection | The mean true direction in degrees from which the wind is blo... | space and time quantity kind , quantity kind , Concept | stable |

Aerodrome mean wind speed | aerodromeMeanWindSpeed | The mean speed of the wind over the 10-minute period immediat... | space and time quantity kind , quantity kind , Concept | stable |

Aerodrome minimum horizontal visibility | aerodromeMinimumHorizontalVisibility | The minimum horizontal visibility that is reported when the h... | space and time quantity kind , quantity kind , Concept | stable |

Aerodrome minimum visibility direction | aerodromeMinimumVisibilityDirection | When the minimum horizontal visibility is reported, its gener... | space and time quantity kind , quantity kind , Concept | stable |

Aeronautical prevailing horizontal visibility | aeronauticalPrevailingHorizontalVisibility | The greatest visibility value, observed in accordance with th... | space and time quantity kind , quantity kind , Concept | stable |

Aeronautical visibility | aeronauticalVisibility | The greater of:(a) The greatest distance at which a black obj... | space and time quantity kind , quantity kind , Concept | stable |

Air temperature | airTemperature | The temperature indicated by a thermometer exposed to the air... | thermodynamics quantity kind , quantity kind , Concept | stable |

Altimeter setting (QNH) | altimeterSettingQnh | Altimeter setting (also known as QNH) is defined as barometri... | mechanics quantity kind , quantity kind , Concept | stable |

Atmospheric pressure | atmosphericPressure | The atmospheric pressure on a given surface is the force per ... | mechanics quantity kind , quantity kind , Concept | stable |

Depth of runway deposit | depthOfRunwayDeposit | Depth of deposit on surface of runway | space and time quantity kind , quantity kind , Concept | stable |

Dew-point temperature | dewPointTemperature | The temperature to which a given air parcel must be cooled at... | thermodynamics quantity kind , quantity kind , Concept | stable |

Geometric height | geometricHeight | Vertical distance (Z) of a level, a point or an object consid... | space and time quantity kind , quantity kind , Concept | stable |

Height of base of cloud | heightOfBaseOfCloud | For a given cloud or cloud layer, vertical distance (measured... | space and time quantity kind , quantity kind , Concept | stable |

Horizontal visibility | horizontalVisibility | The greatest distance determined in the horizontal plane at t... | space and time quantity kind , quantity kind , Concept | stable |

Maximum diameter of hailstones | maximumDiameterOfHailstones | Maximum diameter (size) of hailstone (observed). | space and time quantity kind , quantity kind , Concept | stable |

Maximum wind gust speed | maximumWindGustSpeed | Nominal maximum speed of wind during a given period; usually ... | thermodynamics quantity kind , quantity kind , Concept | stable |

Pressure tendency | pressureTendency | Rate of change of atmospheric pressure with respect to time. | mechanics quantity kind , quantity kind , Concept | stable |

Runway contamination coverage | runwayContaminationCoverage | Proportion of runway that is contaminated. A runway is consid... | quantity kind , Concept | stable |

Runway friction coefficient | runwayFrictionCoefficient | Quantitative assessment of friction coefficient of runway sur... | quantity kind , Concept | stable |

Runway visual range (RVR) | runwayVisualRangeRvr | The range over which the pilot of an aircraft on the centre l... | space and time quantity kind , quantity kind , Concept | stable |

Sea surface temperature | seaSurfaceTemperature | Temperature of the sea water at surface. | thermodynamics quantity kind , quantity kind , Concept | stable |

Snow depth water equivelant | snowDepthWaterEquivalent | Depth of lying snow expressed as measure of equivalent depth ... | space and time quantity kind , quantity kind , Concept | stable |

Total precipitation | totalPrecipitation | Total amount of precipitation measured over a defined period. | mechanics quantity kind , quantity kind , Concept | stable |

Total precipitation rate | totalPrecipitationRate | Rate of total precipitation (e.g. combination of convective a... | mechanics quantity kind , quantity kind , Concept | stable |

Total snow depth | totalSnowDepth | Depth of lying snow. | space and time quantity kind , quantity kind , Concept | stable |

UV index | uvIndex | Global Solar UVI is formulated using the International Commis... | quantity kind , Concept | stable |

Vertical visibility | verticalVisibility | Maximum distance at which an observer can see and identify an... | space and time quantity kind , quantity kind , Concept | stable |

Wind direction | windDirection | Direction from which wind is blowing. | space and time quantity kind , quantity kind , Concept | stable |

Wind speed | windSpeed | Ratio of the distance covered by the air to the time taken to... | space and time quantity kind , quantity kind , Concept | stable |