A tornadic supercell thunderstorm (i.e. one containing a rotating mesocyclone) that produces a limited amount of hail, but effectively no rain at the ground. The precipitation core is thus translucent (compare high-precipitation supercell). In addition, low-precipitation supercells produce lightning within the anvil and in the clear air beneath it rather than beneath the cloud base and in association with the precipitation column. Such a situation may give rise to little or no audible thunder at the ground. A cloud-to-ground stroke beneath the anvil may be totally unexpected and thus regarded as a bolt from the blue.
Subjects: Meteorology and Climatology.