{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/115443"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/115443","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Investigating the longevity of significant-tornado producing supercells","abstract":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms","abstract_html":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms","abstract_has_math":false,"creators":["Housenga, Rylan J"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Atmospheric Sciences","degree_department":null,"school":null,"contributors":["Frame, Jeffrey","Sriver, Ryan","Trapp, Robert J."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2022,"date_issued":"2022-05","date_published":"2022-05","updated_at":"2026-07-22T22:24:54Z","subjects":["supercell","longevity","significant tornado"],"languages":["en","eng"],"rights":["Copyright 2022 Rylan Housenga"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/115443","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Frame, Jeffrey","Sriver, Ryan","Trapp, Robert J."]},{"key":"dc:creator","label":"Author","values":["Housenga, Rylan J"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2022-05","2022-04-27"]},{"key":"dc:type","label":"Dc Type","values":["text","Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Atmospheric Sciences"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["supercell","longevity","significant tornado"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en","eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2022 Rylan Housenga"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/115443"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms","The student, Rylan Housenga, accepted the attached license on 2022-04-22 at 17:03.","The student, Rylan Housenga, submitted this Thesis for approval on 2022-04-22 at 17:09.","This Thesis was approved for publication on 2022-04-27 at 14:15.","DSpace SAF Submission Ingestion Package generated from Vireo submission #17934 on 2022-11-11 at 13:43:13","All 1,515 significant (EF-2+) tornadoes and their environments between 2008 and 2018 in the United States are examined, with a focus on parent supercell thunderstorm longevity. Almost all significant tornadoes are produced by discrete supercells (66%) or clusters (27%), and they are most common in the Plains or Southeast between March and June, with a small secondary peak in November in the Southeast. Bulk wind shear and storm-relative helicity (SRH) are moderately correlated (r ≈ 0.35) with the total time that a supercell is discrete, the total number of significant tornadoes produced by a storm, and the total tornado path length associated with a storm. There is no correlation between storm longevity and any thermodynamic variable. Long-lived (≥ 4 hours) supercells are most frequent in the Southeast, where shear and SRH are typically greatest. Additionally, SRH is roughly 50-70 m2 s-2 greater for the longer-lived supercells (≥ 75th percentile) than for the shorter-lived ones. Another key finding is that excessive (≥ 90th percentile) backing or veering of the wind shear vector above 1 km above ground level (AGL) is detrimental to supercell longevity."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Investigating the longevity of significant-tornado producing supercells"]}]}],"canonical_facts":{"dc:contributor":["Frame, Jeffrey","Sriver, Ryan","Trapp, Robert J."],"dc:creator":["Housenga, Rylan J"],"dc:date":["2022-05","2022-04-27"],"dc:description":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms","The student, Rylan Housenga, accepted the attached license on 2022-04-22 at 17:03.","The student, Rylan Housenga, submitted this Thesis for approval on 2022-04-22 at 17:09.","This Thesis was approved for publication on 2022-04-27 at 14:15.","DSpace SAF Submission Ingestion Package generated from Vireo submission #17934 on 2022-11-11 at 13:43:13","All 1,515 significant (EF-2+) tornadoes and their environments between 2008 and 2018 in the United States are examined, with a focus on parent supercell thunderstorm longevity. Almost all significant tornadoes are produced by discrete supercells (66%) or clusters (27%), and they are most common in the Plains or Southeast between March and June, with a small secondary peak in November in the Southeast. Bulk wind shear and storm-relative helicity (SRH) are moderately correlated (r ≈ 0.35) with the total time that a supercell is discrete, the total number of significant tornadoes produced by a storm, and the total tornado path length associated with a storm. There is no correlation between storm longevity and any thermodynamic variable. Long-lived (≥ 4 hours) supercells are most frequent in the Southeast, where shear and SRH are typically greatest. Additionally, SRH is roughly 50-70 m2 s-2 greater for the longer-lived supercells (≥ 75th percentile) than for the shorter-lived ones. Another key finding is that excessive (≥ 90th percentile) backing or veering of the wind shear vector above 1 km above ground level (AGL) is detrimental to supercell longevity."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/115443"],"dc:language":["en","eng"],"dc:rights":["Copyright 2022 Rylan Housenga"],"dc:subject":["supercell","longevity","significant tornado"],"dc:title":["Investigating the longevity of significant-tornado producing supercells"],"dc:type":["text","Thesis"],"thesis:degree_discipline":["Atmospheric Sciences"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:54Z"}