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Unique formations of asperitas and undulatus spotted over Midlothian, Texas, US
Development of mammatus in conjunction with a storm system over Northwest Iran
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A developing storm that causes dust to rise and swirl from fields that were being plowed to the north, near Antelope Valley, California, US
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During an afternoon wherein there was a Tornado Warning for the county, mammatus (mamma) clouds develop in association with a storm, spotted over Wiliamson County, Texas, US
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Mammatus (Mamma) spotted three miles east of Provost, Alberta, Canada
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A developing cumulonimbus over Northwest Iran
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A storm near the St. Lawrence River, spotted from North Dundas Township, Ontario, Canada
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A storm system on the horizon during what Kay said was a wild weather day for the entire coast, with high surf warnings and unseasonably warm temperatures. A great place for cloudspotting, as Kay and her friend, another CAS member, Helen Shorten, were adding clouds into Kay's Cloud Collector Handbook, as spotted near Tilba Tilba on the south coast of New South Wales, Australia
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Supernumerary bows, with a primary rainbow and a faint secondary rainbow, spotted over Newport Coast, California, US
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Cumulonimbus near Alpine, Texas, US
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A developing storm near Recanati, Italy
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Crepuscular rays amidst a stormy sky, captured near Fremont, California, US
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Supercilium and developing mammatus over the Adirondacks, near Vermontville, New York, US
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An imposing storm system from which Patrick said produced small hail and a small funnel, east of Brighton, Colorado, US
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A storm system near Pismo Beach, California, US
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A dynamic storm system illuminated by the setting sun over San Francisco Bay, near Oakland, California, US
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