Colour state 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). 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. The following criteria are used to determine the colour state: Colour state Colour states is a system used for quickly showing meteorological conditions. Meteorological colour states are determined by the relevant worst condition from
Central Europe region stretches from Central France (the Massif Central) to Central Romania (Carpathians) and Southern Scandinavia. At times, the term "Central Europe" denotes a geographic definition as the Danube region in the heart of the continent, including the language and culture areas which are today included in the states of Croatia, the Czech Republic, Hungary, Poland, Serbia, Slovakia, Slovenia and usually also Austria and Germany, but "never" Russia and other countries of the former Soviet Union towards the Ural mountains. Entirely within Central Europe: Mostly within Central Europe: Partially within Central Europe: Central Europe is one of continent's most populous regions.