The Netherlands will miss its target to fill natural gas storage sites ahead of the winter, its gas network operators said on Wednesday, in one of the first evidence-based signs that Europe may be struggling to have sufficient supply for a harsh winter. Gasunie, the Dutch gas network operator, on Wednesday warned that the country will miss its target to have 115 terawatt-hours (TWh) worth of gas supply. In response to recent media reports about the state of the storage filling, Gasunie said that “based on the latest developments, the Netherlands…