3. Dry Thunderstorms: Blue Sparks in Arid Skies
Blue lightning is especially noticeable in dry thunderstorms, a rare and sometimes contradictory meteorological situation. Usually in dry or semi-arid areas, these storms arise under conditions with very little humidity. These thunderstorms generate plenty of lightning even though the earth receives little notable precipitation. Without rain, spectators have great clarity which helps them to see the blue colour of the lightning more clearly. Preserving the blue wavelengths, the dry air under the storm clouds does not distribute the light as much as moist air would. This phenomena is not only aesthetically arresting but also perhaps dangerous since lack of rain mixed with numerous lightning strikes may cause wildfires. For this reason, meteorologists and fire control teams regularly track dry thunderstorms utilising blue lightning as a sign of very dry conditions and increased fire risk.