Lake-effect snow is produced during cooler atmospheric conditions when a cold air mass moves across long expanses of warmer lake water. The lower layer of air, heated up by the lake water, picks up water vapor from the lake and rises up through the colder air above. The vapor then freezes and is deposited on the leeward (downwind) shores.
Cumulonimbus is a dense, towering vertical cloud, typically forming from water vapor condensing in the lower troposphere that builds upward carried by powerful buoyant air currents. Above the lower portions of the cumulonimbus the water vapor becomes ice crystals, such as snow and graupel, the interaction of which can lead to hail and to lightning formation, respectively. When occurring as a thunderstorm these clouds may be referred to as thunderheads. Cumulonimbus can form alone, in clusters, or along squall lines. These clouds are capable of producing lightning and other dangerous severe weather, such as tornadoes, hazardous winds, and large hailstones. Cumulonimbus progress from overdeveloped cumulus congestus clouds and may further develop as part of a supercell. Cumulonimbus is abbreviated Cb.
The Santa Ana winds are strong, extremely dry downslope winds that originate inland and affect coastal southern California and northern Baja California. They originate from cool, dry high-pressure air masses in the Great Basin.
The mistral is a strong, cold, northwesterly wind that blows from southern France into the Gulf of Lion in the northern Mediterranean. It produces sustained winds often exceeding 66 km/h, sometimes reaching 185 km/h. It is most common in the winter and spring, and strongest in the transition between the two seasons. Periods of the wind exceeding 30 km/h for more than sixty-five hours have been reported.
Orographic lift occurs when an air mass is forced from a low elevation to a higher elevation as it moves over rising terrain. As the air mass gains altitude it quickly cools down adiabatically, which can raise the relative humidity to 100% and create clouds and, under the right conditions, precipitation.
Chinook winds, or simply 'Chinooks', are two types of prevailing warm, generally westerly winds in western North America: Coastal Chinooks and interior Chinooks. The coastal Chinooks are persistent seasonal, wet, southwesterly winds blowing in from the ocean. The interior Chinooks are occasional warm, dry föhn winds blowing down the eastern sides of interior mountain ranges. The coastal Chinooks were the original term, used along the northwest coast, and the term in the interior of North America is later and derives from the coastal term.
In meteorology, lee waves are atmospheric stationary waves. The most common form is mountain waves, which are atmospheric internal gravity waves. These were discovered in 1933 by two German glider pilots, Hans Deutschmann and Wolf Hirth, above the Krkonoše. They are periodic changes of atmospheric pressure, temperature and orthometric height in a current of air caused by vertical displacement, for example orographic lift when the wind blows over a mountain or mountain range. They can also be caused by the surface wind blowing over an escarpment or plateau, or even by upper winds deflected over a thermal updraft or cloud street.
Weather lore is the body of informal folklore related to the prediction of the weather and its greater meaning.
The River Eden is a river that flows through the Eden District of Cumbria, England, on its way to the Solway Firth.
Kirkby Stephen is a market town and civil parish in Cumbria, North West England. Historically part of Westmorland, it lies on the A685, surrounded by sparsely populated hill country, about 25 miles (40 km) from the nearest larger towns: Kendal and Penrith. The River Eden rises 6 miles (9.7 km) away in the peat bogs below Hugh Seat and passes the eastern edge of the town. At the 2001 census the parish had a population of 1,832. In 2011, it had a population of 1,522.
The Morning Glory cloud is a rare meteorological phenomenon consisting of a low-level atmospheric solitary wave and associated cloud, occasionally observed in different locations around the world. The wave often occurs as an amplitude-ordered series of waves forming bands of roll clouds.
The great helm or heaume, also called pot helm, bucket helm and barrel helm, is a helmet of the High Middle Ages which arose in the late twelfth century in the context of the Crusades and remained in use until the fourteenth century. The barreled style was used by knights in most European armies between about 1220 to 1350 AD and evolved into the frog-mouth helm to be primarily used during jousting contests.
Aisgill is the southernmost of the hamlets that comprise the parish of Mallerstang in the English county of Cumbria. It is on the B6259 road, at the head of Mallerstang dale, just before the boundary between Cumbria and North Yorkshire.
Mallerstang is a civil parish in the extreme east of Cumbria, and, geographically, a dale at the head of the upper Eden Valley. Originally part of Westmorland, it lies about 6 miles (9.7 km) south of the nearest town, Kirkby Stephen. Its eastern edge, at Aisgill, borders on North Yorkshire; and since August 2016 it has been within the Yorkshire Dales National Park.
Wild Boar Fell is a mountain in the Yorkshire Dales National Park, on the eastern edge of Cumbria, England. At 2,323 feet (708 m), it is either the 4th-highest fell in the Yorkshire Dales or the 5th, depending on whether nearby High Seat (2,326 ft) is counted or not.
An arcus cloud is a low, horizontal cloud formation, usually appearing as an accessory cloud to a cumulonimbus. Roll clouds and shelf clouds are the two main types of arcus clouds. They most frequently form along the leading edge or gust fronts of thunderstorms; some of the most dramatic arcus formations mark the gust fronts of derecho-producing convective systems. Roll clouds may also arise in the absence of thunderstorms, forming along the shallow cold air currents of some sea breeze boundaries and cold fronts.
Hugh Seat is a mountain, or more accurately a fell, in Mallerstang on the eastern edge of Cumbria, England. It lies on the border between Cumbria and North Yorkshire.
Gregory Chapel is one of the high points of the fells on the border between Cumbria and North Yorkshire.
The levant is an easterly wind that blows in the western Mediterranean Sea and southern France, an example of mountain-gap wind. In Roussillon it is called "llevant" and in Corsica "levante". In the western Mediterranean, particularly when the wind blows through the Strait of Gibraltar, it is called the Viento de Levante or the Levanter. It is also known as the Solano.
This glossary of meteorology is a list of terms and concepts relevant to meteorology and atmospheric science, their sub-disciplines, and related fields.
