cloud types dr. dave dempsey professor of meteorology department of geosciences san francisco state...
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Cloud TypesCloud Types
Dr. Dave Dempsey
Professor of Meteorology
Department of Geosciences
San Francisco State University
Dr. Dave Dempsey
Professor of Meteorology
Department of Geosciences
San Francisco State University
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Steam fog on lake surface
Steam fog on lake surface
• Lassen National Park, CA• ~ 6,000 ft. elevation• October• calm• clear night
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Steam devil (steam fog)
• Yellowstone National Park, WY
• geothermal hot pool• breeze blowing across pool
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Steam devil (steam fog)
Steam devil (steam fog)
• Yellowstone National Park, WY
• geothermal hot pool• breeze blowing across pool
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Port Townsend, WashingtonPort Townsend, WashingtonMixing clouds
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Contrail and
altocumulus clouds Contrail and
altocumulus clouds
Olympic Mts., WA
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Contrails Contrails
Mt. St. Helens, WAtaken May 20, 1979mountain erupted May 18,
1980
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Eastern Sierra Nevada Mts. and Mono Lake, CA
Eastern Sierra Nevada Mts. and Mono Lake, CA
Contrails
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Radiation fog and
altostratus clouds Radiation fog and
altostratus clouds
• Santa Rosa Valley, CA• April• pre-dawn• calm• clear night
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Santa Rosa Valley, CA(sunrise, April)
Santa Rosa Valley, CA(sunrise, April)
Radiation fog
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Central Valley near Chico, CA(morning in December; clear night)
Central Valley near Chico, CA(morning in December; clear night)
Radiation fog
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Central Valley near Chico, CA(morning in December; clear night)
Central Valley near Chico, CA(morning in December; clear night)
Radiation fog
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Central Valley near Chico, CA(morning in December; clear night)
Central Valley near Chico, CA(morning in December; clear night)
Radiation fog
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San Francisco Peninsula,Crystal Springs Reservoir (June)San Francisco Peninsula,Crystal Springs Reservoir (June)
Advection fog
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San Francisco Peninsula(looking southwest; June)Advection fog
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San Francisco (June)Advection fog
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San Francisco (June)Advection fog
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Advection fog Advection fog
Golden Gate,San Francisco
June
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Stratus clouds(marine push)
Stratus clouds(marine push)
• North CascadesNational Park, WA
• ~ 6,000 ft. elevation• well inland from Puget Sound
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Cirrus clouds
Western Colorado
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Cirrus clouds
Acoma Pueblo, NM
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Cirrocumulus clouds
Baja California
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Mt. Everest, NepalCirrostratus (halo, arcs, etc.)
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Mono Lake, CAMid- and high-level clouds
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Mono Lake, CAMid- and high-level clouds
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Point Reyes, CA (Sept.)Altocumulus clouds
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Western Colorado (June)Altocumulus clouds
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Death Valley, CA (March)Altocumulus & cumulus clouds
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Altocumulus clouds
Chico, CA• Daisies• summer
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Boulder, ColoradoStratocumulus (roll) clouds
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S.E. Utah (May)Fairweather cumulus clouds
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Mono Lake, CA (Aug.)Stratocumulus clouds
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Crater Lake N.P, Oregon (July)Cumulus clouds
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San Luis Valley, Colorado (June)Cumulus cloud
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Eastern Colorado (June)Cumulus clouds
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Eastern Utah (July)Cumulonimbus & cumulus clouds
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Western Colorado (July)Cumulonimbus & cumulus clouds
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Eastern Utah (July)Cumulonimbus cloud
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Death Valley N.P., CA (March)
Cumulonimbus cloudwith anvil
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Death Valley N.P., CA (March)
Cumulonimbus cloudwith anvil
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Mojave desert, CA(March)
Cumulonimbus cloudwith anvil
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Northern New Mexico (Feb.)Cumulonimbus
cloud, snowing
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Eastern Colorado (May)Cumulus cloud with
rotating mesocyclone
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Eastern Colorado (May)Cumulus cloud w/rotating mesocyclone, dust updraft
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North Texas (May)Cumulus cloudw/wall cloud, tornado
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Yellowstone N.P., WY (June)
Mammatus cloudsbeneath cumulus anvil
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S.E. Utah (August)Virga (evaporating rain)
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• Pileus cap cloud on cumulus cloud• Cirrus clouds
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Baja California (Feb.)Orographic wave clouds
(lens clouds)
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Cap cloud
Mt. St. Helens, WA (May 1979, before it’sMay 1980 eruption)
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Cap cloud
Mt. St. Helens, WA (May 1979, before itsMay 1980 eruption)
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Orographic Precipitation and Rain Shadow
Orographic Precipitation and Rain Shadow
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California Topography and Precipitation
California Topography and Precipitation
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Temperate rainforest
Hoh rainforest, Olympic
National Park, WA• annual rainfall ~ 160”
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North American Deserts Great Basin Mohave Sonoran Chihuahuan
North American Deserts Great Basin Mohave Sonoran Chihuahuan
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Sand dunes, Eureka Valley, Death Valley NP, CA
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Precipitation Pattern, Maui, Hawaii
Precipitation Pattern, Maui, Hawaii
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Hanakapiai Falls,
Na Pali coast,
Kauai, Hawai annual rainfall ~ 80”
Hanakapiai Falls,
Na Pali coast,
Kauai, Hawai annual rainfall ~ 80”
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Big Island of Hawaii Mauna Loa, Mauna Kea, prickly
pear cacti
Big Island of Hawaii Mauna Loa, Mauna Kea, prickly
pear cacti