Data for "Assessing the contribution of extratropical cyclones to river floods that caused property damage in Quebec, Canada"

From this domain, 6,227 relevant Baseline Southern Quebec extratropical cyclones (which spent at least one hour inside the domain during the study period) were extracted from the NAEC Catalogue (Chen et al., 2022b). We created two datasets with information related to these Baseline Southern Quebec storms: one containing their entire lifetime tracks (NAEC_9120) and one with only their tracks while they were inside the Baseline Southern Quebec domain (NAEC_9120_BSQ).

Among these Baseline Southern Quebec extratropical cyclones, 200 were identified as contributing to flood events (by being associated with high percentages of rainfall during flood events). These were labelled flood ETCs, and are presented in the flood_ETCs dataset. The rest of the identified Baseline Southern Quebec storms (N = 6,027) were labelled as non-flood ETCs.

Alternative scenarios from the control case were studied for spring (MAM) floods (N = 372). These other scenarios involve reducing the search radius for relevant storms (radius), reducing the time interval studied surrounding the flood events (days), and increasing the necessary threshold for being labelled as a flood ETC (threshold). For each of these alternative scenarios, flood_ETCs and local_floods datasets were produced.