Thunderstorm Facts - Does Rain Kill Thunderstorms?
Rain is essentially the killer of some thunderstorms, especially since it is almost inevitable that each thunderstorm will produce copious amounts of precipitation. How is that possible, you ask?
It starts with updrafts, which are columns of warm air that aid the formation of thunderstorms. On top of these updrafts, surrounded by the storm’s clouds, are huge bundles of raindrops that are being formed before they spill out.
The raindrops, according to Dennis Mersereau from Mentalfloss.com, drags cooler air toward the ground, causing a downdraft. “The falling rain causes a downdraft, which is that cool breeze you feel before and during a storm.” Mersereau also states, “most downdrafts are pretty weak, but some are strong enough to cause damaging winds at the surface.”
This is why rain essentially kills the storms; once the downdraft cuts off the flow of warm air to the updraft, the thunderstorm is no longer able to progressively move and grow, causing the storm to rain out.