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Station météo
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Météorologie
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Climatologie
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Informations
Code | Symbol | Type | |
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L1 |
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cumulus humilis cumulus fractus |
little vertical extent and seemingly flattened, or ragged cumulus other than of bad weather, or both |
L2 |
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cumulus mediocris cumulus congestus |
cumulus of moderate or strong vertical extent, generally with protuberances in the form of domes or towers, either accompanied or not by other cumulus or by stratocumulus, all having their bases at the same level |
L3 |
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cumulonimbus calvus | cumulonimbus the summits of which, at least partially, lack sharp outlines, but are neither clearly fibrous (cirriform) nor in the form of an anvil; cumulus, stratocumulus or stratus may also be present |
L4 |
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stratocumulus cumulogenitus | stratocumulus formed by the spreading out of cumulus, cumulus may also be present |
L5 |
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stratocumulus other than stratocumulus cumulogenitus |
stratocumulus not resulting from the spreading out of cumulus |
L6 |
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stratus nebulosus stratus fractus |
stratus in a more or less continuous sheet or layer, or in ragged shreds, or both, but no stratus fractus of bad weather |
L7 |
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stratus fractus of bad weather cumulus fractus of bad weather |
stratus fractus of bad weather or cumulus fractus of bad weather, or both (pannus), usually below altostratus or nimbostratus |
L8 |
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cumulus and stratocumulus | cumulus and stratocumulus other than that formed from the spreading out of cumulus, the base of the cumulus is at a different level from that of the stratocumulus |
L9 |
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cumulonimbus capillatus | cumulonimbus, the upper part of which is clearly fibrous (cirriform), often in the form of an anvil, either accompanied or not by cumulonimbus without anvil or fibrous upper part, by cumulus, stratocumulus, stratus or pannus |
Code | Symbol | Type | |
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M1 |
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altostratus translucidus | altostratus, the greater part of which is semi-transparent, through this part the sun or moon may be weakly visible, as through ground glass |
M2 |
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altostratus opacus altostratus nimbostratus |
altostratus, the greater part of which is sufficiently dense to hide the sun or moon, or nimbostratus |
M3 |
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altocumulus translucidus at a single level |
altocumulus, the greater part of which is semi-transparent, the various elements of the cloud change only slowly and are all at a single level |
M4 |
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altocumulus translucidus patches at one or more levels |
patches (often in the form of almonds or fish) of altocumulus, the greater part of which is semi-transparent, the clouds occur at one or more levels and the elements are continually changing in appearance |
M5 |
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altocumulus translucidus bands |
semi-transparent altocumulus in bands, or altocumulus, in one or more fairly continuous layer (semi-transparent or opaque), progressively invading the sky, these altocumulus clouds generally thicken as a whole |
M6 |
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altocumulus cumulogenitus altocumulus cumulonimbogenitus |
altocumulus resulting from the spreading out of cumulus (or cumulonimbus) |
M7 |
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altocumulus translucidus altocumulus opacus two or more layers altocumulus opacus in a single layer |
altocumulus in two or more layers, usually opaque in places, and not progressively invading the sky, or opaque layer of altocumulus, not progressively invading the sky, or altocumulus together with altostratus or nimbostratus |
M8 |
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altocumulus castellanus altocumulus floccus |
altocumulus with sproutings in the form of small towers or battlements, or altocumulus having the appearance of cumuliform tufts |
M9 |
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altocumulus of a chaotic sky |
altocumulus of a chaotic sky, generally at several levels |
Code | Symbol | Type | |
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H1 |
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cirrus fibratus cirrus uncinus |
cirrus in the form of filaments, strands or hooks, not progressively invading the sky |
H2 |
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cirrus spissatus | dense cirrus, in patches or entangled sheaves, which usually do not increase and sometimes seem to be the remains of the upper part of a cumulonimbus, or cirrus with sproutings in the form of small turrets or battlements, or cirrus having the appearance of cumuliform tufts |
H3 |
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cirrus spissatus cumulonimbogenitus | dense cirrus, often in the form of an anvil, being the remains of the upper parts of cumulonimbus |
H4 |
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cirrus uncinus cirrus fibratus |
cirrus in the form of hooks or of filaments, or both, progressively invading the sky, they generally become denser as a whole |
H5 |
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cirrus and cirrostratus cirrostratus |
cirrus (often in bands converging towards one point or two opposite points of the horizon) and cirrostratus, or cirrostratus alone, in either case, they are progressively invading the sky, and generally growing denser as a whole, but the continuous veil does not reach 45 degrees above the horizon |
H6 |
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cirrus and cirrostratus cirrostratus |
cirrus (often in bands converging towards one point or two opposite poitns of the horizon) and cirrostratus, or cirrostratus alone, in either case, they are progressively invading the sky, and generally growing denser as a whole, the continuous veil extends more than 45 degrees above the horizon, without the sky being totally covered |
H7 |
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cirrostratus covering the whole sky |
veil of cirrostratus covering the celestial dome |
H8 |
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cirrostratus | cirrostratus not progressively invading the sky and not completely covering the celestial dome |
H9 |
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cirrocumulus cirrocumulus predominant among CH clouds |
cirrocumulus alone, or cirrocumulus accompanied by cirrus or cirrostratus, or both, but cirrocumulus is predominant |