Storm Emma, also called Ulrike, was a deep depression which was part of the 2017–18 European windstorm season. As it interacted with Anticyclone Hartmut, a cold wave, Emma's warmer damp air rode over the cold air that had been over Western Europe for a few days, leading to heavy snow falls of up to . It brought a renewed push of cold air to much of the United Kingdom with temperatures falling as low as in Nairnshire. The worst affected areas were southwest England and southern Wales.
Snowfall, and temperatures
Snowfall
Although the maximum snow fall was , most places affected reported a general total of . Snowfall was reported along the coast of Italy and French Riviera for the first time since 2010 and UK since 29 September 2017. Snow also fell in Barcelona, a rare occurrence for the region, disrupting Formula One car testing ahead of the 2018 season.
Temperatures
Throughout the storm, the temperatures were very low with Cairn Gorm recording a daytime high of on 1 March. However, more generally places saw maximum temperatures between .
Effects
Holyhead Marina in Holyhead, North Wales was destroyed due to the storm on March 1–2, 2018.