Abstract: It has been proposed that evaporation of precipitation failing from widespread thick masses of nimbostratus derived from cumulonimbus can account for the mesoscale unsaturated downdrafts inferred to occur within certain ...

Abstract: A severe thunderstorm which spawned at least four tornadoes, one of them anticyclonic, formed over central Iowa during the afternoon of 13 June 1976. This storm moved toward the east-northeast, approximately parallel to ...

Abstract: This study compares several formulations parameterizing the surface moisture flux and boundary-layer processes using the ?-σ hybrid-b model of the Mesoscale Analysis and Prediction System (MAPS) within both 1D and 3D ...

Abstract: On 9 June 1988 a mesoscale (?200-km diameter) convectively generated vortex (MCV) passed through the Colorado wind-profiling network. The generating convective system, which was too small to meet Maddox?s mesoscale convective ...

Abstract: The hypothesis that inertial instability plays a role in the upscale development of mesoscale convective systems (MCSs) is explored by sampling environments that supported the growth of MCSs in the Preliminary Regional ...

Abstract: This study compares three modifications to the one-dimensional planetary boundary layer scheme that is implemented in the σ?? hybrid-b version of the Mesoscale Analysis and Prediction System (MAPS) and the Rapid Update ...

Abstract: Case studies of heavy snowstorms at Denver and Colorado Springs, Colorado, indicate that they occur under different meteorological conditions. The authors examine the hypothesis that there are in fact fundamental differences ...

Abstract: he Rapid Refresh (RAP) and High-Resolution Rapid Refresh (HRRR), both operational at NOAA?s National Centers for Environmental Prediction (NCEP) use the Thompson et al. mixed-phase bulk cloud microphysics scheme. This ...

Abstract: This study uses a series of numerical simulations to examine the structure of the wake of the Hawaiian island of Kauai. The primary focus is on the conditions on 26 June 2003, which was the day of the demise of the Helios ...

Abstract: A mesoscale atmospheric forecast model configured in a hybrid isentropic?sigma vertical coordinate and used in the NOAA Rapid Update Cycle (RUC) for operational numerical guidance is presented. The RUC model is the only ...