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Sirocco
Sirocco (/sɪˈrɒk/), scirocco, jugo or, rarely, siroc (see other Names below) is a Mediterranean wind that comes from the Sahara and can reach hurricane speeds in North Africa and Southern Europe, especially during the summer season. Sirocco is derived from the Arabic word sharqiyya (شرقية) which means 'easterly'
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Derecho

A derecho (/dəˈr/, from Spanish: derecho [deˈɾetʃo], "straight" as in direction) is a widespread, long-lived, straight-line wind storm that is associated with a fast-moving group of severe thunderstorms known as a mesoscale convective system[1] and potentially rivaling hurricanic and tornadic forces. Derechos can cause hurricane-force winds, tornadoes, heavy rains, and flash floods
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Tropics
The tropics are the region of Earth surrounding the Equator. They are delimited in latitude by the Tropic of Cancer in the Northern Hemisphere at 23°26′11.7″ (or 23.43658°) N and the Tropic of Capricorn in the Southern Hemisphere at 23°26′11.7″ (or 23.43658°) S; these latitudes correspond to the axial tilt of the Earth. The tropics are also referred to as the tropical zone and the torrid zone (see geographical zone). The tropics include all zones on Earth where the Sun contacts a point directly overhead at least once during the solar year (which is a subsolar point). Thus the maximum latitudes of the tropics have the same value positive and negative. Likewise they approximate, due to the earth not being a perfect sphere, the "angle" of the Earth's axial tilt
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Thundersnow
Thundersnow, also known as a winter thunderstorm or a thundersnowstorm, is an unusual[1][2] kind of thunderstorm with snow falling as the primary precipitation instead of rain. It typically falls in regions of strong upward motion within the cold sector of an extratropical cyclone. Thermodynamically, it is not different from any other type of thunderstorm, but the top of the cumulonimbus cloud is usually quite low. In addition to snow, graupel or hail may fall as well. Thundersnow, while relatively rare anywhere, is more common with lake-effect snow in the Great Lakes area of the United States and Canada, the midwestern United States, and the Great Salt Lake. Thundersnow also occurs in Halifax, Nova Scotia, sometimes several times per winter season. Bozeman, Montana also sees thundersnow more often than average with these storms typically occurring in April or May
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Mesocyclone
A mesocyclone is storm-scale region of rotation (vortex), typically around 2 to 6 mi (3.2 to 9.7 km) in diameter, within a thunderstorm. In the northern hemisphere it is particularly found in the right rear flank of a supercell or often on the eastern, or front, flank of an HP storm. The circulation of a mesocyclone covers an area much larger than the tornado that may develop within it.[1] Mesocyclones are detectable on Doppler weather radar as a rotation signature which meets specific criteria for magnitude, vertical depth, and duration. On US NEXRAD radars displays, they will be highlighted by a yellow solid circle on the Doppler velocity products but other countries may have other conventions
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Supercell
A supercell is a thunderstorm characterized by the presence of a mesocyclone: a deep, persistently rotating updraft.[1] For this reason, these storms are sometimes referred to as rotating thunderstorms.[2] Of the four classifications of thunderstorms (supercell, squall line, multi-cell, and single-cell), supercells are the overall least common and have the potential to be the most severe. Supercells are often isolated from other thunderstorms, and can dominate the local weather up to 32 kilometres (20 mi) away. They tend to last 2–4 hours. Supercells are often put into three classification types: classic (Normal precipitation level), low-precipitation (LP), and high-precipitation (HP). LP supercells are usually found in climates that are more arid, such as the high plains of the United States, and HP supercells are most often found in moist climates
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Anticyclonic Tornado
An anticyclonic tornado is a tornado which rotates in a clockwise direction in the Northern Hemisphere and a counterclockwise direction in the Southern Hemisphere.[1] The term is a naming convention denoting the anomaly from normal rotation which is cyclonic in upwards of 98 percent of tornadoes.[citation needed] Many anticyclonic tornadoes are smaller and weaker than cyclonic tornadoes, forming from a different process, as either companion/satellite tornadoes or nonmesocyclonic tornadoes.[2] Various processes can produce an anticyclonic tornado. Most often they are satellite tornadoes of larger tornadoes which are directly associated with the tornadocyclone and mesocyclone. Occasionally anticyclonic tornadoes occur as an anticyclonic companion (mesoanticyclone) to a mesocyclone within a single storm. Anticyclonic tornadoes can occur as the primary tornado with a mesocyclone and under a rotating wall cloud
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Landspout
Landspout is a term created by atmospheric scientist Howard B. Bluestein in 1985 for a kind of tornado not associated with a mesocyclone.[1] The Glossary of Meteorology defines a landspout as Landspouts are a type of tornado that forms during the growth stage of a cumulus congestus cloud by stretching boundary layer vorticity upward and into the cumulus congestus's updraft. These generally are smaller and weaker than supercell tornadoes and do not form from a mesocyclone or pre-existing rotation in the cloud. Because of this, landspouts are rarely detected by Doppler weather radar.[3] Landspouts share a strong resemblance and development process to that of waterspouts, usually taking the form of a translucent and highly laminar helical tube. Landspouts are considered tornadoes since a rapidly rotating column of air is in contact with both the surface and a cumuliform cloud
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