Archived from the original on 6 April 2007. "Glossary of Meteorology, Second Edition". ^ American Meteorological Society (2000).On Severe Local Storms, Indianapolis, American Meteorological Society. "The formation of a "landspout" in a "broken-line" squall line in Oklahoma". 1 US county for producing tornadoes just spawned another landspout". "Why Landspout Tornadoes are Common in Colorado". Landspouts are commonly weak however, on rare occasions, a landspout can be as strong as an EF2 or EF3 tornado. They may form in lines or groups of multiple landspouts. Landspouts tend to progress through recognizable stages of formation, maturation, and dissipation, and usually decay when a downdraft or significant precipitation (outflow) occur nearby. A notable example is the propensity for landspout occurrence in the Denver Convergence Vorticity Zone (DCVZ).įorming in relation to misocyclones and under updrafts, a landspout generally lasts for less than 15 minutes however, they can persist substantially longer, and produce significant damage. Orography can influence landspout (and even mesocyclone tornado) formation. Not all landspouts are visible, and many are first sighted as debris swirling at the surface before eventually filling in with condensation and dust. Landspouts are considered tornadoes since a rapidly rotating column of air is in contact with both the surface and a cumuliform cloud. "They are typically narrow, rope-like condensation funnels that form while the thunderstorm cloud is still growing and there is no rotating updraft", according to the National Weather Service. Landspouts share a strong resemblance and development process to that of waterspouts, usually taking the form of a translucent and highly laminar helical tube. Because of this lower depth, smaller size, and weaker intensity, landspouts are rarely detected by Doppler weather radar (NWS). These generally are smaller and weaker than supercell tornadoes and do not form from a mesocyclone or pre-existing rotation in the cloud. Landspouts are a type of tornado that forms during the growth stage of a cumulus congestus or occasionally a cumulonimbus cloud when an updraft stretches boundary layer vorticity upward into a vertical axis and tightens it into a strong vortex. Landspouts are typically weaker than mesocyclone-associated tornadoes spawned within supercell thunderstorms, in which the strongest tornadoes form. To gush forth in a rapid stream or in spurts: Water spouted from the faucet. The landspout was so named because it looks like "a weak Florida Keys waterspout over land." spouts synonyms, spouts pronunciation, spouts translation, English dictionary definition of spouts. The parent cloud does not contain a preexisting mid-level mesocyclone. "Colloquial expression describing tornadoes occurring with a parent cloud in its growth stage and with its vorticity originating in the boundary layer. The Glossary of Meteorology defines a landspout as 1a transitive to shoot liquid out with a lot of force Synonyms and related words + 2 intransitive/transitive informal to talk, especially for a long time or in a boring way We listened patiently while my uncle spouted a lot of nonsense. Bluestein in 1985 for a tornado not associated with a mesocyclone. Send us feedback about these examples.Landspout is a term created by atmospheric scientist Howard B. These examples are programmatically compiled from various online sources to illustrate current usage of the word 'downspout.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Alex Rennie, Popular Mechanics, 1 June 2022 See More Alex Rennie, Popular Mechanics, 1 June 2022 These can also be placed in the bottom of the downspout to prevent rodents and other small animals from nesting. Better Homes & Gardens, 8 June 2022 Designed to fit directly onto the downspout of your filter, these Massca guards are ideal for those who don’t want to hassle with complex installation of full-length guards. Better Homes & Gardens, 8 June 2022 Keep in Mind: The downspout can be tricky to install. Alex Rennie, Popular Mechanics, 1 June 2022 It's also designed to work with a variety of downspout types. 2022 Its long polypropylene bristles allow water to flow freely through, while preventing leaves and pine needles from entering the gutter and downspout. 2023 The roof downspout and ceiling in the main hall were repaired, and repairs and refurbishments were made to bathrooms on both floors. Beck Andrew Salgado, Journal Sentinel, 27 Feb. 2023 The rain is expected to continue off and on for the next several hours so the weather service says the threat of flooding will continue for small streams, low-lying areas and urban areas where drains and downspouts may have been blocked or clogged by snow. Recent Examples on the Web That will affect the positioning of your downspouts.
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