<Tr> <Th> Storms </Th> </Tr> <Tr> <Td> <Ul> <Li> Cloud </Li> <Li> Cumulonimbus cloud </Li> <Li> Arcus cloud </Li> <Li> Downburst </Li> <Li> Microburst </Li> <Li> Heat burst </Li> <Li> Dust storm </Li> <Li> Simoom </Li> <Li> Haboob </Li> <Li> Monsoon </Li> <Li> Gale </Li> <Li> Sirocco </Li> <Li> Firestorm </Li> <Li> Lightning </Li> <Li> Supercell </Li> <Li> Thunderstorm </Li> <Li> Severe thunderstorm </Li> <Li> Thundersnow </Li> <Li> Storm surge </Li> <Li> Tornado </Li> <Li> Cyclone </Li> <Li> Mesocyclone </Li> <Li> Anticyclone </Li> <Li> Tropical cyclone (Hurricane) </Li> <Li> Extratropical cyclone </Li> <Li> European windstorm </Li> <Li> Atlantic Hurricane </Li> <Li> Typhoon </Li> <Li> Derecho </Li> <Li> Landspout </Li> <Li> Dust devil </Li> <Li> Fire whirl </Li> <Li> Waterspout </Li> <Li> Winter storm <Ul> <Li> Ice storm </Li> <Li> Blizzard </Li> <Li> Ground blizzard </Li> <Li> Snowsquall </Li> </Ul> </Li> </Ul> </Td> </Tr> <Ul> <Li> Cloud </Li> <Li> Cumulonimbus cloud </Li> <Li> Arcus cloud </Li> <Li> Downburst </Li> <Li> Microburst </Li> <Li> Heat burst </Li> <Li> Dust storm </Li> <Li> Simoom </Li> <Li> Haboob </Li> <Li> Monsoon </Li> <Li> Gale </Li> <Li> Sirocco </Li> <Li> Firestorm </Li> <Li> Lightning </Li> <Li> Supercell </Li> <Li> Thunderstorm </Li> <Li> Severe thunderstorm </Li> <Li> Thundersnow </Li> <Li> Storm surge </Li> <Li> Tornado </Li> <Li> Cyclone </Li> <Li> Mesocyclone </Li> <Li> Anticyclone </Li> <Li> Tropical cyclone (Hurricane) </Li> <Li> Extratropical cyclone </Li> <Li> European windstorm </Li> <Li> Atlantic Hurricane </Li> <Li> Typhoon </Li> <Li> Derecho </Li> <Li> Landspout </Li> <Li> Dust devil </Li> <Li> Fire whirl </Li> <Li> Waterspout </Li> <Li> Winter storm <Ul> <Li> Ice storm </Li> <Li> Blizzard </Li> <Li> Ground blizzard </Li> <Li> Snowsquall </Li> </Ul> </Li> </Ul> <Li> Tropical cyclone (Hurricane) </Li>

During which of the following stages of thunderstorm development does precipitation begin (2 points)