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The result is the nearly daily development of clouds that produce thunderstorms. For example, "Lightning Alley"—an area from Tampa to Orlando—experiences an extremely high density of lightning strikes. As of 2007, there were as many as 50 strikes per square mile (about 20 per km 2) per year.
No thunderstorms: 2 Isolated thunderstorms. Lightning is very infrequent, 1–5 cloud-to-ground strikes in a five-minute period. 3 Widely scattered thunderstorms. Lightning is infrequent, 6–10 cloud-to-ground strikes in a five-minute period. 4 Scattered thunderstorms. Lightning is frequent, 11–15 cloud-to-ground strikes in a 5-minute period. 5
When such storms have a brief period of severe weather associated with them, it is known as a pulse severe storm. Pulse severe storms are poorly organized and occur randomly in time and space, making them difficult to forecast. Single-cell thunderstorms normally last 20–30 minutes. [15]
Thunderstorms developed west of Cleveland at 9 p.m., and the National Weather Service issued a severe thunderstorm warning at 9:55 p.m. The storm had passed over Cuyahoga County by 10:20 p.m. [56] Lightning struck 10 times per minute over Cleveland Heights. [56] and 80 mph (130 km/h) winds knocked down hundreds of trees and utility poles.
This template should be added only to the end of stub articles which describe a specific historical weather event. Data templates {{ Tornado Chart }} for tornado events to show the number of tornadoes produced and their intensity
Highest number of tropical storms in a season: 39 official storms during the 1964 Pacific typhoon season: May 12, 1964 – December 17, 1964: Northwest Pacific Ocean [38] Warmest eye: 34.0 °C (93.2 °F) at 700 hPa height: August 19, 1979: Typhoon Judy in the northwest Pacific Ocean [39] Coldest cloud tops produced by a tropical cyclone
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It originates from a mass of storm clouds at an altitude of more than 1 km (0.6 mi), and occurs for 140 to 160 nights a year, nine hours per day, and with lightning flashes from 16 to 40 times per minute. [3] It occurs over and around Lake Maracaibo, typically over a bog area formed where the Catatumbo River flows into the lake. [4]