Cloud the bottom of the hierarchy. Clouds in the troposphere assume five physical forms based on structure and process of formation. These forms are commonly used for the purpose of satellite analysis. They are given below in approximate ascending order of instability or convective activity. "Non-convective" stratiform clouds appear in "stable" airmass conditions and, in general, have flat sheet-like structures that can form at any altitude in the troposphere. The stratiform group is divided by altitude range into the genera cirrostratus (high-level), altostratus (mid-level), stratus (low-level), and nimbostratus (multi-level). Fog is commonly considered a surface-based cloud layer. The fog may form
Fear or provocation of violence level 5 on the standard scale, or both. Section 4(3) of the 1986 Act formerly provided that a constable could arrest without warrant anyone he reasonably suspected was committing this offence. This was repealed by section 174 of, and Part 2 of Schedule 17 to, the Serious Organised Crime and Police Act 2005. The Crime and Disorder Act 1998 (c.37) creates a label of "racially-aggravated" in its Section 28, Meaning of “racially aggravated”. It describes here what is indicated by the term "racially aggravated", and describes “racial group”: "means a group of persons defined by reference to race, colour, nationality