Tornado emergency
While many tornadoes observed to be at or larger than ¼-mile in width have been documented to have produced catastrophic damage falling under the "strong" or "violent" categories (EF2–EF5) of the Enhanced Fujita Scale, there have been instances in which tornadoes of this intensity have resulted in very few to no fatalities and, occasionally, have produced damage corresponding to the Enhanced Fujita Scale's "weak" category (EF0–EF1).Some NWS forecast offices, such as the one serving the Des Moines, Iowa, metropolitan area, have created standardized criteria and purpose for the usages of the heightened wording.The prolific 2011 Super Outbreak set the all-time record for the most tornado emergencies issued by the National Weather Service during a 24-hour period.[10] National directive allows for the use of tornado emergency products when a severe threat to human life exists and catastrophic damage is imminent or occurring.[13] The first tornado emergency ever issued in the Northeastern United States was issued by the National Weather Service in Mount Holly, New Jersey, on September 1, 2021, at 7:04 pm for Bristol, Croydon and Burlington when a confirmed large and destructive tornado was observed over Beverly heading towards the highly populated areas of Levittown, Trenton, and Hamilton Square.One notable instance occurred on April 15, 2022, when the National Weather Service office in Little Rock, Arkansas, issued tornado emergencies for several communities across seven counties in north-central and northeastern parts of the state.[19] The area where the emergencies were issued were within coverage “dead zones” in the radii of NEXRAD radars based in Little Rock, Springfield, Missouri, and Memphis, Tennessee; the supercell was within the highest beam tilt of each radar (ranging roughly 6,000–10,000 feet above ground level), impairing the ability of the radars to provide accurate wind velocity and correlation coefficient data, with large hail being produced by the storm contaminating the correlation coefficient data, producing lower values often indicative of lofted debris.The storm occurring at nightfall in a mostly rural area also complicated matters, with video taken by residents and posted on social media erroneously confusing a tube cloud that extended to near surface level for a tornado.
tornado warningNational Weather ServiceUnited Statestornadosafe roomEnhanced Fujita Scaleflash floodsList of tornado emergenciesMay 3, 1999 tornado outbreakan F5 tornadoBridge CreekOklahoma CityDel CityMidwest CityWeather Forecast OfficeNormanSumiton, AlabamaDes Moines, Iowa2007 Greensburg tornado2011 Super OutbreakBirminghamHuntsville, AlabamaMemphis, TennesseeJackson, MississippiEF4 Tuscaloosa–Birmingham, Alabama tornadoPhiladelphiaSmithville, MississippiHackleburg–Phil CampbellRainsville, Alabamabroader nine-day outbreak sequenceWichitaTopekaSpringfieldSt. LouisKansas CityPleasant HillOklahoma City metropolitan areacentral OklahomaEF5 tornado that struck MooreCanadian Countyanother tornadoMemorial DayMay 27, 2019Dayton, OhioTrotwood, OhioTupelo, Mississippia larger outbreakYazoo City, MississippiNortheastern United StatesMount Holly, New JerseyBristolCroydonBurlingtonBeverlyLevittownTrentonHamilton SquarePennsylvaniaNew JerseyHurricane IdaNational Weather Service officeLittle Rock, ArkansasNEXRADSpringfield, Missouritube cloudJacksonvilleTulsa, OklahomaSpotter NetworkspoofedNWS officeShreveport, LouisianaBowie County, TexasNew Boston, TexasLeague CityDeer Park, Texasan unusual EF3 tornadoPearlandPasadenaBaytownDecember 2023 Tennessee tornado outbreakNashville, TennesseeHendersonville, TennesseeGallatin, TennesseeBarnsdallBartlesvilleoffice in Northern IndianaBranch County, MichiganWilliamsonRutherfordTornado preparednessbasementmattressesblanketsList of United States tornado emergenciesList of tornadoes and tornado outbreaksNorman, OklahomaYahoo! NewsAssociated PressNational Oceanic and Atmospheric AdministrationAccuWeatherArkansas Democrat-GazetteTimes NowKTBS-TVFulton CountyRandolph CountyJackson CountyLawrence CountySharp CountyGreene CountyCraighead CountyCherokee VillageWalnut RidgeSevere weather terminologyThunderstormAdvisoryPDS watchWarningPDS warningSpecial marine warningWinter weather advisoryWinter stormBlizzard/blowing snowBlowing snow advisoryBlizzard watchBlizzard warningLake-effect snow