A storm will be named when it is deemed able to have a "substantial" impact on the UK or Ireland. They will be taken from the list, in alphabetical order, alternating between male and female names – the same naming convention that is used by the United States for tropical cyclones. In the case of storms resulting from ex-tropical storms and hurricanes, the original name allocated by the US National Hurricane Center will be used. Met Éireann name any storm which triggers a status Orange or Red weather warning for wind. The basis for such, as outlined on their weather warning service, are mean wind speeds in excess of 40 mph (65 km/h) or gusts over 68 mph (110 km/h). Similarly, the Met Office name storms that have the potential to cause medium (Amber) or high (Red) impacts to the UK. It describes the wind strength relative to observations such as "falling trees or tiles, other items like garden furniture being blown around and even a number of properties left without electrical power. "