northwest cloud formations northwest cloud formations geology 252: the earth and its weather ron...
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![Page 1: Northwest Cloud formations Northwest Cloud formations Geology 252: The Earth and its Weather Ron Kleinknecht](https://reader036.vdocuments.mx/reader036/viewer/2022062320/56649d625503460f94a44568/html5/thumbnails/1.jpg)
Northwest Cloud formations Northwest Cloud formations Geology 252: The Earth and its Weather
Ron Kleinknecht
![Page 2: Northwest Cloud formations Northwest Cloud formations Geology 252: The Earth and its Weather Ron Kleinknecht](https://reader036.vdocuments.mx/reader036/viewer/2022062320/56649d625503460f94a44568/html5/thumbnails/2.jpg)
High Clouds (Cirrus) CH • Etymology: Latin , Tendril, flexible appendage
• Height: Above 10,000 ft. (3 km) to ~ 60,000 ft. (18 km). Tropopause
• Ice crystals
• Forms:
– mares tails, hooks, filaments & strands
– cirrofractus
– cirrostratus
– cirrocumulus (mackerel sky)
![Page 3: Northwest Cloud formations Northwest Cloud formations Geology 252: The Earth and its Weather Ron Kleinknecht](https://reader036.vdocuments.mx/reader036/viewer/2022062320/56649d625503460f94a44568/html5/thumbnails/3.jpg)
Mares’ tails over Whistler
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Cirrus with strands, filaments and hooks
![Page 5: Northwest Cloud formations Northwest Cloud formations Geology 252: The Earth and its Weather Ron Kleinknecht](https://reader036.vdocuments.mx/reader036/viewer/2022062320/56649d625503460f94a44568/html5/thumbnails/5.jpg)
Cirrus with more strands and filaments
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Cirrus (Stratus?)
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Sun Dog (parahelia) Through Cirrostratus
![Page 8: Northwest Cloud formations Northwest Cloud formations Geology 252: The Earth and its Weather Ron Kleinknecht](https://reader036.vdocuments.mx/reader036/viewer/2022062320/56649d625503460f94a44568/html5/thumbnails/8.jpg)
Sundog in Perspective
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Cirrocumulus (Mackerel Sky)
![Page 10: Northwest Cloud formations Northwest Cloud formations Geology 252: The Earth and its Weather Ron Kleinknecht](https://reader036.vdocuments.mx/reader036/viewer/2022062320/56649d625503460f94a44568/html5/thumbnails/10.jpg)
Cirrus and Stratus at Sunset
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Alto, (high) mid- level clouds (Cm)
• Height: Between 6,500 ft. (2 km) and 25,000 ft. (8 km)• Forms:
– Altocumulus
– Altostratus
![Page 12: Northwest Cloud formations Northwest Cloud formations Geology 252: The Earth and its Weather Ron Kleinknecht](https://reader036.vdocuments.mx/reader036/viewer/2022062320/56649d625503460f94a44568/html5/thumbnails/12.jpg)
Altocumulus
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Altostratus and Cumulus Congestus over Orcas Island
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Winter Altostratus over South Bellingham
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Layers of Cirrus, Altostratus and ?
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Low Clouds (CL)• Height: ground to 6,500 ft. (2 km)
• Forms:– Fog– cumulus – stratus– Nimbostratus (rain)– cumulonimbus (rain/storm)
• Base starts low but can develop up to tropopause
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October Cumulus with Moderate Vertical Development
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Dissipating Cumulonimbus
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Summer StratocumulusJuly 2001
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Late Summer Stratus with Fog Lifting
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Stratocumulus over the Bay at Summer SunsetJuly 2001
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Altocumulus at night:Sailors’ delight or warning?
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Where is the Virga?
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Weather Dragons Come Out
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Looking for the green flash