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RISPhase-Correcting Data Assimilation and Application to Storm-Scale Numerical Weather Prediction. Part II: Application to a Severe Storm Outbreak
Publisher: American Meteorological Society
Abstract: A scheme to correct phase errors in numerical model forecasts using Doppler radar, radiosonde, profiler, and surface data is demonstrated to improve forecasts in a complex severe thunderstorm situation. The technique is ...
Photographs of a Funnel-Producing Indented Cloud-Base Swirl
Publisher: American Meteorological Society
Abstract: An interesting swirl in the cloud base of a severe thunderstorm near Denver, Colorado, is documented with photographs and Doppler radar velocity measurements. The swirl, which produced two funnel clouds, may have been an ...
Phase-Correcting Data Assimilation and Application to Storm-Scale Numerical Weather Prediction. Part I: Method Description and Simulation Testing
Publisher: American Meteorological Society
Abstract: An objective method of determining and correcting phase or position errors in numerical weather prediction is described and tested in a radar data observing system simulation experiment (OSSE) addressing the forecasting ...
Comparison of Eddy Dissipation Rates from Spatial Spectra of Doppler Velocities and Doppler Spectrum Widths
Publisher: American Meteorological Society
Abstract: Doppler radars offer unique data from which it is possible to estimate the turbulent eddy dissipation rates, ?. If the inertial subrange extends to lengths longer than the radar resolution volume size, ? can be obtained ...
Sensitivities of 1-km Forecasts of 24 May 2011 Tornadic Supercells to Microphysics Parameterizations
Publisher: American Meteorological Society
Abstract: n 24 May 2011, Oklahoma experienced an outbreak of tornadoes, including one rated EF-5 and two rated EF-4. The extensive observation network in this area makes this an ideal case to examine the impact of using five different ...
Near-Real-Time Applications of a Mesoscale Analysis System to Complex Terrain
Publisher: American Meteorological Society
Abstract: Several mesoscale data analysis systems are reviewed, of which one is then adapted and applied to the complex terrain of northwest Utah and the western United States. The analysis system relies on the simple, but computationally ...
An Isentropic Three-Hourly Data Assimilation System Using ACARS Aircraft Observations
Publisher: American Meteorological Society
Abstract: A 3-h intermittent data assimilation system (Mesoscale Analysis and Prediction System?MAPS) configured in isentropic coordinates was developed and implemented in real-time operation. The major components of the system are ...
Multiscale Characteristics and Evolution of Perturbations for Warm Season Convection-Allowing Precipitation Forecasts: Dependence on Background Flow and Method of Perturbation
Publisher: American Meteorological Society
Abstract: ultiscale convection-allowing precipitation forecast perturbations are examined for two forecasts and systematically over 34 forecasts out to 30-h lead time using Haar Wavelet decomposition. Two small-scale initial condition ...
Exploring Ensemble Forecast Sensitivity to Observations for a Convective-Scale Data Assimilation System over the Dallas–Fort Worth Testbed
Publisher: American Meteorological Society
Evaluation of Convection-Permitting Precipitation Forecast Products Using WRF, NMMB, and FV3 for the 2016–17 NOAA Hydrometeorology Testbed Flash Flood and Intense Rainfall Experiments
Publisher: American Meteorological Society
Abstract: AbstractDuring the summers of 2016 and 2017, the Center for Analysis and Prediction of Storms (CAPS) ran real-time storm-scale ensemble forecasts (SSEFs) in support of the Hydrometeorology Testbed (HMT) Flash Flood and ...