thunderclouds over the lule river

august bay beautifully blue bymoln calvus capillatus center city cloud clouds cumulonimbus cumulus day europe flash flashes heavy incus july june lule luleälven luleå mumbles norden norrbotten norrland north phenomena rain river scandinavia shower showers skyfall storm stormy summer sweden swedish thunder thundercloud thunderstorms tornar torrential water watercourses weather winds