Kilometer-scale models provide new opportunities to understand how weather systems respond to climate change by explicitly representing convection, mesoscale organization, complex terrain, and coupled processes. Regional convection-permitting simulations and emerging global storm-resolving models offer complementary approaches, ranging from targeted event studies to multi-decadal climate simulations.

This session focuses on how kilometer-scale modelling can advance our understanding of weather in a changing climate. We particularly welcome studies using event attribution, storylines, pseudo-global-warming experiments, extreme-event boosting, and other process-oriented approaches to investigate the mechanisms driving changes in individual events or classes of weather systems.

We invite contributions that:
1. use regional or global kilometer-scale simulations to investigate climate change effects on weather and extremes;
2. use attribution, storylines, pseudo-global-warming, extreme-event boosting, or targeted experiments to investigate the effects of climate change on weather systems and the mechanisms involved;
3. examine the physical mechanisms and cross-scale interactions that control changes in the intensity, frequency, duration, or organization of extremes;
4. compare regional and global kilometer-scale modelling approaches, including their respective strengths, limitations, and complementarity;
5. evaluate the added value, biases, uncertainties, and computational challenges of kilometer-scale modelling.

Studies of heavy precipitation, severe convection, tropical cyclones, heatwaves, windstorms, compound extremes, and other high-impact weather are encouraged. Contributions from regional and global modelling communities, including those involved in CORDEX, DYAMOND, nextGEMS, Destination Earth, and EERIE, are particularly welcome.