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A high risk severe weather event is the greatest threat level issued by the Storm Prediction Center (SPC) for convective weather events in the United States. On the scale from one to five, a high risk is a level five; thus, high risks are issued only when forecasters at the SPC are confident of a major severe weather outbreak.
The event was confirmed to be a derecho in Finland alone, extending the swath of wind damage to the west coast of the country. [110] August 2010 Baltic – Finland derecho: 8 August 2010: Severe wind gusts more than 81 mph (130 km/h; 36 m/s) were measured in Estonia. [110] [111] This was determined to be a derecho event. [112] July 2011 ...
Severe weather is one type of extreme weather, which includes unexpected, unusual, severe, or unseasonal weather and is by definition rare for that location or time of the year. [5] Due to the effects of climate change , the frequency and intensity of some of the extreme weather events are increasing, for example, heatwaves and droughts .
The event marked the first time the word "tornado" was used during a public television weather broadcast (it was said by Oklahoma City WKY-TV's weatherman Harry Volkman). The word had been a banned word by the FCC at the time. (28 significant, 11 violent, 20 killer) [1] [27] Tornado outbreak of May 21–24, 1952: May 21–24, 1952
Parts of this article (those related to Number of tornadoes in United States by year and intensity) need to be updated. The reason given is: Numbers need to be updated.. Please help update this article to reflect recent events or newly available information. (August 2024)
Phenomena caused by severe thunderstorms. Excessive Lightning. Derecho. Extreme wind (70 mph or greater) Downpours. Heavy rain. Flood, flash flood, coastal flooding. Hail. High winds – 93 km/h (58 mph) or higher.
List of major snow and ice events in the United States. The following is a list of major snow and ice events in the United States that have caused noteworthy damage and destruction in their wake. The categories presented below are not used to measure the strength of a storm, but are rather indicators of how severely the snowfall affected the ...
Extreme Weather Source Book -- Economic and Other Societal Impacts Related to Hurricanes, Floods, Tornadoes, Lightning, and Other U.S. Weather Phenomena (University of Colorado at Boulder) Tornado History Project Searchable US tornado database overlaid on a Google Map; Weather data archives. Severe Thunderstorm Events (SPC) Various (NCDC)