Cirrus uncinus | |
Abbreviation | Ci unc |
Family | A |
Genus | Cirrus |
Occurrence | Worldwide |
Altitude | >7000m, in troposphere |
Formation | Saturation of upper-level air mass combined with strong wind immediately below cloud level |
Precipitation | None |
Potential Hazards | Indicates an approaching frontal system (usually warm or occluded) |
Cirrus Uncinus have the shape of ponytails, commas, hooks or hooks. They gradually increase throughout the sky and may indicate the approach of a warm or occluded front; This is generally true if they are followed by Cirrostratus. That is, they indicate bad weather. They are formed by wind shear.
Clouds | |
---|---|
High Clouds (Family A): | Cirrus (Ci) • Cirrus aviaticus • Cirrus intortus • Cirrus radiatus • Cirrus uncinus • Cirrus Kelvin-Helmholtz • Cirrostratus (Cs) • Cirrocumulus (Cc) • Pileus • Contrail |
Middle Clouds (Family B): | Altostratus (As) • Altostratus undulatus • Altocumulus (Ac) • Altocumulus undulatus • Altocumulus mackerel sky • Altocumulus castellanus • Altocumulus lenticularis |
Low Clouds (Family C): | Stratus (St) • Orographic stratus • Fog • Nimbostratus (Ns) • Cumulus humilis (Cu) • Cumulus mediocris (Cu) • Stratocumulus (Sc) |
Vertical Clouds (Family D): | Cumulonimbus (Cb) • Cumulonimbus incus • Cumulonimbus calvus • Cumulonimbus with mammatus • Cumulus congestus • Cumulus castellanus • Pyrocumulus • Pyrocumulonimbus |