Severe and Hazardous Weather


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Severe Thunderstorms and Tornadoes in the United States


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Severe thunderstorms and tornadoes affect communities across the U.S. every year, causing fatalities, destroying property and crops, and disrupting businesses. Tornadoes are the most destructive products of severe thunderstorms. Damages from violent tornadoes seem to be increasing, similar to the trend for other natural hazards in part due to changing population, demographics, and more weather-sensitive infrastructure and some analysts indicate that losses of $1 billion or more from single tornado events are becoming more frequent. Insurance industry analysts state that tornadoes, severe thunderstorms, and related weather events have caused nearly 57%, on average, of all insured catastrophe losses in the U.S. in any given year since 1953. Contents of this report: (1) Overview; (2) Issues for Congress: A Focus on Local Warnings and Forecasts for the National Weather Service; Mitigation: The National Windstorm Impact Reduction Program; Reauthorizing the National Windstorm Impact Reduction Program; Climate Change and Severe Weather: The April and May 2011 Tornados: A Link to Climate Change?; Other Factors Contributing to Risk From Tornadoes; Forecasting and Warning: The Role of the National Weather Service; Summary and Conclusions; Appendix: Risk from Severe Thunderstorms and Tornadoes. Map and tables. This is a print on demand report.




Severe Weather Forecasting


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National Severe Local Storms Operation Plan


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National Severe Local Storms Operations Plan


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From Research to Operations in Weather Satellites and Numerical Weather Prediction


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This workshop report examines the capability of the forecast system to efficiently transfer weather and climate research findings into improved operational forecast capabilities. It looks in particular at the Environmental Modeling Center of the National Weather Service and environmental observational satellite programs. Using these examples, the report identifies several shortcomings in the capability to transition from research to operations. Successful transitions from R&D to operational implementation requires (1) understanding of the importance (and risks) of the transition, (2) development and maintenance of appropriate transition plans, (3) adequate resource provision, and (4) continuous feedback (in both directions) between the R&D and operational activities.







Scanning the Skies


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Tornadoes, nature's most violent and unpredictable storms, descend from the clouds nearly one thousand times yearly and have claimed eighteen thousand American lives since 1880. However, the U.S. Weather Bureau--fearing public panic and believing tornadoes were too fleeting for meteorologists to predict--forbade the use of the word "tornado" in forecasts until 1938. Scanning the Skies traces the history of today's tornado warning system, a unique program that integrates federal, state, and local governments, privately controlled broadcast media, and individuals. Bradford examines the ways in which the tornado warning system has grown from meager beginnings into a program that protects millions of Americans each year. Although no tornado forecasting program existed before WWII, the needs of the military prompted the development of a severe weather warning system in tornado prone areas. Bradford traces the post-war creation of the Air Force centralized tornado forecasting program and its civilian counterpart at the Weather Bureau. Improvements in communication, especially the increasing popularity of television, allowed the Bureau to expand its warning system further. This book highlights the modern tornado watch system and explains how advancements during the latter half of the twentieth-century--such as computerized data collection and processing systems, Doppler radar, state-of-the-art television weather centers, and an extensive public education program--have resulted in the drastic reduction of tornado fatalities.




What Is Severe Weather?


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What are tornadoes? Blizzards? Hurricanes? Readers will learn the ins and outs of severe weather in this book. Accessible text and appealing photos show severe weather conditions and encourage students to be weather aware and to take proper precautions in the event of severe weather.