Tonight an unusually strong appearance of the northern lights are forecasted by the Icelandic Met Office in Iceland. Strength is estimated to be around 6 on a scale of 0 to 9. Usually the highest strength during winter, the whole northern lights season in Iceland, is around 5. Most of the time the strength is around 3 to 4 which gives quite a satisfactory and often spectacular Northern Lights but requires a dark area. A strength of 6 and a clear sky makes it easier to see the Aurora Borealis in a city or in any urban area.