Is there any possibility to have tower cumulus (or cumulonimbus in worst case) without lightnings? And if this is happen what is the factor that cause this phenomenon?

  • $\begingroup$ was just reading about this today. It is possible to have cumolonimbus without thunder or lightnings. The reason is that not all clouds reach freezing level and many may have warm rain without electrification. $\endgroup$
    – gansub
    May 17 '18 at 13:53
  • $\begingroup$ @liontassThe key to this answer is to get more soundings over the ocean in the tropics where low level easterlies abound and then ask the question - do you need to have presence of supercooled water to have rain ? It is true that over the tropical oceans CAPE is very high ? $\endgroup$
    – gansub
    May 18 '18 at 8:43
  • $\begingroup$ This phenomenon I noticed one month ago in the Mediterranean region and in latitude N36.00. I had returns to the weather radar for 21-24000 heights with a distinct core and reain and no lightning. $\endgroup$
    – liontass
    May 19 '18 at 11:29
  • $\begingroup$ Entirely possible. Was it over land or over ocean waters ? Could be stratiform precipitation as well. Only a DPR radar analysis can tell us what kind of cores there are - stratiform, convective, width of storm, height of storm. $\endgroup$
    – gansub
    May 19 '18 at 13:09
  • $\begingroup$ Read the answers here - earthscience.stackexchange.com/questions/10038/… $\endgroup$
    – gansub
    May 19 '18 at 13:16

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