Colour state

Colour state

Colour States are a system used for quickly showing meteorological conditions.[1][2]

Meteorological colour states are determined by the relevant worst condition from the visibility and significant cloud height. In the USA and parts of Europe the lowest significant cloud layer is 5 oktas or more; in the United Kingdom, Belgium, France and the Netherlands it is three oktas or more.[3] If visibility or cloud height measurements fall on a boundary (e.g. 5000 m visibility or 1500 ft cloud height) the colour state assumes the higher value in this case WHT.

If an airfield runway is unusable for reasons other than clouds or low visibility, e.g. ice or other obstructions, then the word BLACK is written in full and placed immediately before the actual colour state e.g. BLACKWHT.[4]

The colour state may be appended to a METAR report. A short period forecast called a TREND which covers the following two hours from the observation may also be added, often with reference to the colour state.

Colour state criteria

Colour state BLU WHT GRN YLO1 YLO2 AMB RED
Cloud height in feet 2500 1500 700 500 300 200 <200
Visibility in metres 8000 5000 3700 2500 1600 800 <800

[5]

References


Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Colour revolution — Colour revolutions is a term that was widely used by the media to describe related movements that developed in several societies in the CIS (former USSR) and Balkan states during the early 2000s. The term has also been applied to a number of… …   Wikipedia

  • State Express 555 — is a brand of cigarette manufactured by British American Tobacco. It was first launched in 1895 and is a very popular brand in Asia, especially China where it is BAT s most popular brand. State Express 555 cigarettes are positioned on the market… …   Wikipedia

  • colour — /kul euhr/, n., adj. v.t., v.i. Chiefly Brit. color. Usage. See or1. * * * I Aspect of any object that may be described in terms of hue, brightness, and saturation. It is associated with the visible wavelengths of electromagnetic radiation, which …   Universalium

  • colour — 1 BrE color AmE noun 1 A COLOUR (C) red, blue, yellow, green, brown, purple etc: What colour are your eyes? They re brown. | My favourite colour is purple. | light/bright/pastel etc colour: Children like bright colors. | be an orange/greenish etc …   Longman dictionary of contemporary English

  • “Colour out of Space, The“ —    Short story (12,300 words); written in March 1927. First published in Amazing Stories(September 1927); first collected in O;corrected text in DH;annotated version in An1and CC A surveyor for the new reservoir to be built “west of Arkham”… …   An H.P.Lovecraft encyclopedia

  • State funeral — A state funeral is a public funeral ceremony held to honour heads of state or other important people of national significance. They usually include much pomp and ceremony. Generally, they are held to involve the general public in the mourning… …   Wikipedia

  • State Opening of Parliament — United Kingdom This article is part of the series: Politics and government of the United Kingdom …   Wikipedia

  • State Bank of India Officers Association (Chennai Circle) — The State Bank of India Officers Association (Chennai Circle) whose motto is Service before Self is a registered Trade Union of the S.B.I Officers working in the three states of Tamilnadu, Kerala and Pondicherry.The then General Secretary of the… …   Wikipedia

  • colour-blindness — noun The state or quality of being colour blind …   Wiktionary

  • State emblem of Pakistan — The state emblem of Pakistan was adopted in 1954. The emblem s green colour and the star and crescent at the top are symbols of Islam, the religion with which most Pakistani citizens identify. In the center is a quartered shield, with each… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”