Trends of monthly Convective Available Potential Energy (CAPE) and single or multiple event extreme precipitation indices, namely RX1day, RX5day R20mm, were analyzed for the summer 1979–2013 over United States (US) southern Canada. A homogeneity test in CAPE data using Wilcoxon-rank-sum showed that statistically significant change points mainly occurred between 2000 2003 probably due to changes...

Climate and reanalysis models contain large water and energy budget errors over tropical land related to the misrepresentation of diurnally forced moist convection. Motivated by recent work suggesting that the water and energy budget is influenced by the sensitivity of the convective diurnal cycle to atmospheric state, this study investigates the relationship between convective intensity, the c...

Destruction and fatalities from recent tornado outbreaks in North America have raised considerable concerns regarding their climatic and geographic variability. However, regional characterization of tornado activity in relation to large-scale climatic processes remains highly uncertain. Here, a novel Bayesian hierarchical framework is developed for elucidating the spatiotemporal variability of ...

The intensification of tornado depends mainly on the synoptic conditions of the troposphere. The main objective of this paper is to differentiate the prevalent atmosphere from thermodynamically point of view. Atmospheric stability parameters such as Lifted Index (LI), Total Total Index (TT), Deep Convective Index (DCI), Wind Index (WI), Severe Weather Threat Index (SWEAT), Convective Available ...

Summertime convection over Arizona typically begins in the early afternoon and continues into the night. This suggests that the evolution of the daytime planetary boundary layer is important to the development of Arizona convection. If numerical models are to provide useful guidance for forecasting convection during the monsoon, then the planetary boundary layer must be simulated as accurately ...