Severe Weather Research at NSSL Using the MYRORSS Database

The National Severe Storms Laboratory and the National Climatic Data Center have been partnered for the past two years in an effort to reprocess all of the WSR-88D Level-II radar data archive through the Warning Decision Support System—Integrated Information (WDSS-II) software suite. This effort has been referred to as the Multi-Year Reanalysis Of Remotely Sensed Storms (MYRORSS). The goal of this effort is several-fold: 1) produce 3D merged reflectivity grids from quality-controlled single WSR-88D Level-II data; 2) produce 2 composite layer (low- and mid-level) merged azimuthal shear products derived from single WSR-88D Doppler velocity data; 3) produce several reflectivity-derived severe weather parameters, such as estimated hail size and Vertically Integrated Liquid; and 4) produce QPE grids. This presentation will summarize the base product production and quality control, and severe weather products and projects.  The current status of the MYRORSS production and quality control will be discussed.  Future work, including evaluating severe weather warnings using the database, will also be discussed.