Floods are among the most disastrous and costly extreme weather events in Europe. Atmospheric blocking conditions (persistent, quasi-stationary, and self-preserved weather systems that interrupt westerly flow) are part of the main weather regimes in the Euro-Atlantic. Major flood events in the continent have been associated with blocked patterns. However, the conditions that explain how atmospheric blocking can propagate into floods are largely unexplored on a long-term and continental scale. Over the period 1960-2019, this study analyses annual maximum discharge in >6000 basins in Europe, atmospheric and soil variables from ERA5(-Land) reanalyses, and a hybrid North Hemisphere blocking index derived from ERA5. We analyse how atmospheric blocking modulates wet spell characteristics and the spatial patterns it induces in streamflow maxima, precipitation maxima and soil moisture excess maxima, among other variables relevant to flood generation. Additionally, we derive regional flood indices and explore how these are linked to North Hemisphere blocking. Across Europe, preliminary results show positive anomalies in wet spell duration and total depth under blocking conditions, and mixed positive and negative anomalies in mean precipitation and wet spell frequency. Our results indicate that continental patterns induced by blocking are significantly correlated between streamflow maxima and soil moisture excess maxima, but not between streamflow maxima and rainfall maxima. At the regional scale, the effects of blocking are better defined, acting on the soil-rainfall interaction in all regions and on heavy rainfall in the Alps-Carpathians. Greenland blocking increases flood magnitude and synchronicity across all regions without changing the timing, while Scandinavian blocking reduces floods in the Western-Central region and shifts the timing to the warm season. These outcomes suggest a signature of atmospheric blocking on floods mediated by soil moisture excess (the rainfall-surface interaction), at relevant scales not previously explored.