Version 2 of the Rapid Update Cycle became operational in April 1998. The RUC-2 features a 1-h assimilation cycle, assimilation of new observation types, much improved parameterizations of turbulence and cloud processes, and 40-km/40 level spatial resolution. We will present overall skill and examples of wind, temperature, icing, and turbulence forecasts from the RUC-2. We will also present information on the data sets actually being used in the operational RUC-2 at NCEP.
Currently, the RUC-2 cycles cloud variables through the 1-h cycle, leading to improved short-term precipitation forecasts. Work is underway toward including satellite, radar, and surface observations to modify initial cloud fields. The RUC-2 cloud analysis procedure will be described and examples shown. Finally, upgrades to the cloud microphysics and other aspects of the RUC-2 will be presented
The 8th Conference on Aviation, Range, and Aerospace Meteorology