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This is an accepted version of this page This is the latest accepted revision, reviewed on 26 December 2024. Vortex or tornado occurring over a body of water For a pipe carrying water from a roof, see Downspout. For regrowth on trees, see Water sprout. For the performance act of regurgitating fluids, see Water spouting. A waterspout near Thailand in 2016 Part of a series on Weather Temperate ...
Waterspouts. Though the word waterspout sounds harmless or even cute, these natural phenomenon can range from mild (if the weather isn't too extreme) to dangerous, tornado-like columns of air and ...
The parent cloud does not contain a preexisting mid-level mesocyclone. The landspout was so named because it looks like "a weak Florida Keys waterspout over land." [4] Landspouts are typically weaker than mesocyclone-associated tornadoes spawned within supercell thunderstorms, in which the strongest tornadoes form.
A waterspout is a columnar vortex forming over water that is, in its most common form, a non-supercell tornado over water that is connected to a cumuliform cloud. While it is often weaker than most of its land counterparts, stronger versions spawned by mesocyclones do occur.
A waterspout is defined by the National Weather Service as a tornado over water. However, researchers typically distinguish "fair weather" waterspouts from tornadic (i.e. associated with a mesocyclone) waterspouts. Fair weather waterspouts are less severe but far more common, and are similar to dust devils and landspouts.
Waterspouts can also form from mesocyclones, but more often develop from environments of high instability and low vertical wind shear. The process in which an extratropical cyclone undergoes a rapid drop in atmospheric pressure (24 millibars or more) in a 24-hour period is referred to as explosive cyclogenesis , and is usually present during ...
A Hurricane Warning can remain in effect if dangerously high storm surge, or a combination of dangerous storm surge and waves continue, even when winds fall below hurricane criteria. (This product is issued as a Typhoon Warning by the NWS Forecast Office in Barrigada, Guam, which uses a 24-hour maximum lead time before the onset of tropical ...
A waterspout formed on the White Oak River in North Carolina as Hurricane Dorian skirted the East Coast of the United States, bringing heavy rain, tornadoes, and severe damage to parts of the ...