Severe weather warnings for tornadoes: Storm based false alarm ratio (%)2007-09-30T00:00:000.75000.74001.01351MetSevere weather warnings for tornadoes: Storm based false alarm ratio (%)2008-09-30T00:00:000.76000.74001.02703MetSevere weather warnings for tornadoes: Storm based false alarm ratio (%)2009-09-30T00:00:000.77000.72001.06944MetSevere weather warnings for tornadoes: Storm based false alarm ratio (%)2010-09-30T00:00:000.74000.72001.02778MetSevere weather warnings for tornadoes: Storm based false alarm ratio (%)2011-09-30T00:00:000.73000.72001.01389MetSevere weather warnings for tornadoes: Storm based false alarm ratio (%)2012-09-30T00:00:000.73000.72001.01389MetSevere weather warnings for tornadoes: Storm based false alarm ratio (%)2013-09-30T00:00:000.74000.72001.02778MetSevere weather warnings for tornadoes: Storm based false alarm ratio (%)2014-09-30T00:00:000.7000.72000.972222ExceededSevere weather warnings for tornadoes: Storm based false alarm ratio (%)2015-09-30T00:00:000.7000.72000.972222ExceededSevere weather warnings for tornadoes: Storm based false alarm ratio (%)2016-09-30T00:00:000.69000.71000.971831ExceededSevere weather warnings for tornadoes: Storm based false alarm ratio (%)2017-09-30T00:00:000.72000.71001.01408MetSevere weather warnings for tornadoes: Storm based false alarm ratio (%)2018-09-30T00:00:000.69000.71000.971831ExceededSevere weather warnings for tornadoes: Storm based false alarm ratio (%)2019-09-30T00:00:000.7000.71000.985915ExceededSevere weather warnings for tornadoes: Storm based false alarm ratio (%)2020-09-30T00:00:000.69000.71000.971831ExceededSevere weather warnings for tornadoes: Storm based false alarm ratio (%)2021-09-30T00:00:000.71000.71001MetSevere weather warnings for tornadoes: Storm based false alarm ratio (%)2022-09-30T00:00:000.66000.71001.08ExceededSevere weather warnings for tornadoes: Storm based false alarm ratio (%)2023-09-30T00:00:000.71000.71001MetSevere weather warnings for tornadoes: Storm based false alarm ratio (%)2024-09-30T00:00:000.7100Severe weather warnings for tornadoes: Storm based false alarm ratio (%)2025-09-30T00:00:000.7100