Anticyclone Hartmut was a storm that began on 22 February 2018, and brought a cold wave to Great Britain and Ireland. Anticyclone Hartmut also brought widespread unusually low temperatures and heavy snowfall to large areas. The cold wave combined with Storm Emma, part of the 2017–18 European windstorm season, which made landfall in southwest England and the south of Ireland on 2 March.

The 2017–2018 European windstorm season was the third instance of seasonal European windstorm naming. France, Spain and Portugal took part in winter storm naming for the first time this season.