Abstract: A uniform spatial localization for all scales is commonly applied in the ensemble-based data assimilation (DA) systems to treat sampling errors. Early studies suggest that the optimal effective localization length for the large scale is broader than that for the small scale.
With NEXRAD now approaching the 30-year mark since its installation, intense study has been underway on designing a replacement national weather radar system. One system design framework—a multifunction phased array radar (MPAR) system—is designed to meet the needs of several end users simultaneously, including NOAA, FAA, DoD, and DHS. More recently, a weather-only radar system with update times on the order of one minute has been investigated.
Using Machine Learning Applications and HREFv2 to Enhance Hail Prediction for Operations Convective Meteorology (Mesoscale Dynamics) Amanda Burke April 12, 2019 3:00 pm/ NWC 5600 Abstract: Severe hail results in, on average, more than a billion dollars of damage within the continental United States each year. Thus, timely and accurate operational hail forecasts are vital […]
Effects of the Representation of Rimed Ice in Bulk Microphysics Schemes on Polarimetric Signatures Marcus Johnson Friday, April 5th 3:00pm/NWC 5600 Abstract: Many flavors of multi-category, multi-moment bulk microphysics schemes (BMPs) are available for storm-scale modeling and have various treatments of rimed ice. In this study, we compare three two-moment schemes available in the WRF model […]
High-Temporal Resolution Observations of Tornadoes Using the Atmospheric Imaging Radar Casey Griffin Friday, March 29th 3:00pm/NWC 5600 Advisors: Dr. Robert Palmer and Dr. David Bodine Phased array radars provide flexible scanning strategies and high-temporal resolution data, which is particularly useful for studying rapidly evolving features, like tornadoes, which have advective timescales of 10 s or […]
A number of novel techniques to examine polarimetric radar data collected via PPI scans in a time-height format have been developed in recent years. Using primarily polarimetric radar data collected by WSR-88D radars, techniques such as quasi-vertical profiles (QVPs), range-defined quasi-vertical profiles (RD-QVPs), and column vertical profiles (CVPs) have been used to investigate the vertical structure of precipitating systems such as winter storms, mesoscale convective systems, and landfalling hurricanes.