1950, November 24: Ice Crashes through Garage Roof
On November 24, 1950, a one foot cube of ice fell out of a clear sky to crash through the roof of a garage in Wandsworth, England. The Air Ministry failed to determine an origin for the ice block.
At the moment I have just one source for this account -- Frank Edwards' Stranger Than Science (1959) -- so it is marked both as 'needs investigation' and 'unreliable'. I will update this account as I have time.