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Clouds form a vast ring of Gyoer, 70 miles west of Budapest, Hungary, following a torrential shower and hail storm. The formation is a shelf cloud - a low, horizontal wedge-shaped arcus cloud, associated with a thunderstorm gust front (or occasionally with a cold front, even in the absence of thunderstorms).

from Washington Post

Pic of the week: Giant haboob swallows Phoenix

Haboobs are caused by strong winds blasting out of a thunderstorm, kicking up the loose sand and dust.


Thunderstorms. What Are Thunderstorms? Thunderstorms are the most common kind of severe storm. They form in clouds called thunderheads, or cumulonimbus.

A wall cloud forming from underneath a rotating thunderstorm.

A shelf cloud is a low, horizontal, wedge-shaped arcus cloud. A shelf cloud is attached to the base of the parent cloud, which is usually a thunderstorm, but could form on any type of convective clouds. Rising cloud motion often can be seen in the leading (outer) part of the shelf cloud, while the underside often appears turbulent and wind-torn.

What is a waterspout? A waterspout is a whirling column of air and water mist. Waterspouts fall into two categories: fair weather waterspouts and tornadic waterspouts. Tornadic waterspouts are tornadoes that form over water, or move from land to water. They have the same characteristics as a land tornado. They are associated with severe thunderstorms, and are often accompanied by high winds and seas, large hail, and frequent dangerous lightning.

Severe thunderstorms have formed over south-east Queensland and are hitting Brisbane.

Subscribe for more weekly adventures! - Explore the fascinating world of weather! Create rainbows thunderstorms blizzards and more as you learn about 9 major weather types. Have fun while learning our digital sandbox design seamlessly blends education with engaging play. Experiment and Discover: Weather controls allow you to change atmospheric conditions such as temperature wind speed precipitation cloud coverage and so much more…

Top 10 Weather Photographs: 1/20/2015 – The top 10 weather photographs shared in the Mr Twister Weather Snapshot group on January 18th 2015 #1 Wayne Simoncelli (549 Likes) Chasing mostly