CUMULONIMBUS CLUSTER - WEATHER EVENTS

by ZAMG

Parameter	Description
Precipitation (incl. thunder)	Heavy rain showers, thunderstorms and hail showers. The most intensive weather activities to be found during mature stage of development of the larger CBs and with the highest cloud tops. If movement of the cluster slow, large amounts of precipitation to be expected. In the dissipating stage heavy showers becoming light to moderate with no further thunderstorm activity.
Temperature	Remarkable drop possible in connection with downdrafts.
Wind (incl. gusts)	Wind gusts and even downbursts.
Other relevant information



19 July 1999/15.00 UTC - Meteosat VIS image; blue: surface observation, red: lightning reports (British lightning detection system)	19 July 1999/15.00 UTC - German Radar image; red: precipitation intensity 10 - 30 mm/hr, black: precipitation intensity >30 mm/hr