0 snow that falls at the same time as there is a storm with thunder and lightning (= flashes of bright light in the sky produced by electricity):
A powerful late season storm brought heavy snow to much of Southern Manitoba on Tuesday along with some local thundersnow in some localities.
Thundersnow is rare because it requires a great deal of atmospheric instability, caused by fluctuating temperatures not often found in wintertime.
Thundersnow happens when enough rising air causes a reaction.
Thundersnow is unusual because it can only occur in a few months of the year.
Snowfall rates of 2-3 inches (58 cm) per hour were common, and thundersnow occurred.
Some suburbs reported thundersnow, which is the meteorlogical term for thunder and lightning in a snowstorm.
The storm also generated a rare meteorological phenomenon known as thundersnow in which thunder and lightning occur concurrently with the falling snow.
The presence of this thundersnow shows how energetic this storm became.
