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For thunderstorms, outflow tends to indicate the development of a system. Large quantities of outflow at the upper levels of a thunderstorm indicate its development. Too much outflow in the lower levels of a thunderstorm, however, can choke off the low-level inflow which fuels it. [ 1 ]
[10] Severe is defined as hail 1 to 2 inches (25 to 51 mm) diameter, winds 58 to 75 miles per hour (93 to 121 km/h), or a tornado. [11] Significant severe is defined as hail 2 inches (51 mm) in diameter or larger, winds 75 mph (65 knots, 120 km/h) or more, or a tornado of strength EF2 or stronger. [1] [12]
In Canada, a severe thunderstorm is defined as having wind gusts of greater than 90 km/h (56 mph), hail with a diameter of greater than two centimetres (0.79 in), rainfall rates of greater than 50 millimetres (2.0 in) in one hour or greater than 75 millimetres (3.0 in) in three hours, or tornadoes. [14]
The severe weather in the Midwest will erupt near the center of the storm system, while severe storms extend from northern Florida to at least as far to the north as Maryland and Delaware in the ...
The storms could bring quarter-sized hail (1 inch) and wind gusts of up to 60 mph. "At 8:03 p.m., severe thunderstorms were located along a line extending from near Newport to near Poolville ...
Nitric oxide present during thunderstorm phenomena, [59] caused by the oxidation of atmospheric nitrogen, can result in the production of acid rain, if nitric oxide forms compounds with the water molecules in precipitation, thus creating acid rain. Acid rain can damage infrastructures containing calcite or certain other solid chemical compounds.
Blood rain; Cold drop (Spanish: gota fría; archaic as a meteorological term), colloquially, any high impact rainfall event along the Mediterranean coast of Spain; Drought, a prolonged water supply shortage, often caused by persistent lack of, or much reduced, rainfall; Floods. Flash flood; Rainstorm; Red rain in Kerala (for related phenomena ...
A severe thunderstorm outbreak, also called a severe weather outbreak or simply a severe outbreak, is an event in which a weather system or combination of weather systems produces a multitude of severe thunderstorms in a region over a continuous span of time.