Software and Data for "Long term temporal trends in synoptic-scale weather conditions favoring significant tornado occurrence over the central United States"

This is software and data to support the manuscript "Long term temporal trends in synoptic-scale weather conditions favoring significant tornado occurrence over the central United States," which is under review with PLOS One. The software includes all code that is necessary to follow and evaluate the work. Additional public datasets include tornado data from the Storm Prediction Center (http://www.spc.noaa.gov/wcm/#gis), MERRA-2 reanalysis data (https://doi.org/10.5067/VJAFPLI1CSIV), North American Regional Reanalysis data (https://psl.noaa.gov/data/gridded/data.narr.html), Global Wind Oscillation data (https://psl.noaa.gov/map/clim/gwo.data.txt), and the Nino 3.4 index.(https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/ensostuff/detrend.nino34.ascii.txt).