mammatus clouds with trees in foreground

sky cumulus tree wind plain horizon daytime sunlight field storm prairie nature grassland plant thunderstorm thunder mammatus clouds trees foreground unusual distinctive formations bulges pouches emerging base shape protruding elongated tube hanging formed association large cumulonimbus clouds turbulence underside projecting descends levels reverses cloud-forming growth uneven base weather associated forms thunderstorms huge mass unstable air chance hail heavy rain lightning vicinity air cold winter snow types common mammatus latin mamma udder breast striking appearance visible framed sunlight supplementary firm meteorologists enthusiasts stratocumulus altostratus altocumulus