Weather and climate extremes have happened in sequence with similar characteristics, such as long-lasting drought and severe forest fire. Recently, the succession of two extreme yet opposite characteristics occurring in close proximity, such as the 2018 Japan severe flood followed by record-breaking heat wave, calls for a closer look at the synoptic-climate.  From Europe to Asia, heat waves and severe thunderstorms can happen in rapid succession as well, modulated by a quick phase change of the meandering yet semi-stationary short waves.  The changing climate may or may not affect all those circulation ingredients, making extreme-event attribution analysis difficult.  This session calls for recent advancement in combining the mesoscale, synoptic-scale, and large-scale diagnostics and modeling towards understanding mechanism, prediction and its future with a focus on the compounding factors that bridge weather and climate.