International Cloud Atlas
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Appendix 4 - Lists of tables, figures and acronyms

(Section A.4)

List of Tables

Table 1  Cloud forms (genera) associated with each falling hydrometeor (precipitation) type.
Table 2  Cloud classifications
Table 3  Symbols and/or abbreviations for cloud genera and species
Table 4  Abbreviations for cloud varieties, supplementary features and accessory clouds
Table 5  Abbreviations for mother-clouds and special clouds
Table 6  Approximate heights of each level, and the genera occurring in each.
Table 7  Cloud species and the genera with which they most frequently occur
Table 8  Cloud varieties and the genera with which they most frequently occur
Table 9  Cloud supplementary features and the genera with which they most frequently occur
Table 10  Accessory clouds and the genera with which they most frequently occur
Table 11  Scale for the brightness of noctilucent clouds
Table 12  Guide for the identification of the genera of clouds
Table 13  Scale for optical thickness of clouds
Table 14  Cloud symbols corresponding to the CL, CM and CH codes
Table 15  Classification of hydrometeors other than clouds
Table 16  Classification of lithometeors
Table 17  Classification of photometeors
Table 18  Classification of electrometeors
Table 19  Classification of character and intensity of precipitation
Table 20  Nature of showery precipitation, trend over time and location
Table 21  Enhanced Fujita scale for rating the intensity of tornadoes
Table 22  Differentiation characteristics of the 46° halo and the supralateral arc

List of Figures

Figure 1  The 10 genera within their allocated level or levels
Figure 2  Orographic cloud in stable conditions and high moisture windward
Figure 3  Orographic cloud in unstable conditions and high moisture windward
Figure 4  Orographic cloud in stable conditions and low moisture windward
Figure 5  Mountain waves
Figure 6  Satellite image of lee wave trains (A = alignment of the ranges: B= wind direction)
Figure 7  Trapped lee waves
Figure 8  Vertically propagating wave 
Figure 9  Rotor cloud
Figure 10  Pictorial cloud identification guide
Figure 11  Cloud classification aid CL 
Figure 12  Cloud classification aid CM 
Figure 13  Cloud classification aid CH

List of Acronyms

CBS Commission for Basic Systems
CCH  Committee for the Study of Clouds and Hydrometeors
CEN  International Commission for the Study of Clouds
Cg  Congress of the World Meteorological Organization 
CIMO  Commission for Instruments and Methods of Observation 
CSM  Commission for Synoptic Meteorology
C.S.W.I.  Commission for Synoptic Weather Information
EC  Executive Committee 
EC  Executive Council 
I.M.O.  International Meteorological Organization 
ICA International Cloud Atlas 
NMHSs   National Meteorological and Hydrological Services
WIGOS  WMO Integrated Global Observing System
WMO  World Meteorological Organization
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The text enclosed in grey-shaded boxes, like this example, comprises Annex I to the Technical Regulations (WMO-No. 49) and has the legal status of standard practices and procedures.

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