From that edition of Symon's Meteorological Magazine
"The Daily Weather Report of the Meteorological Office as issued during the past few weeks, reflects an interesting manner the progress of events in Europe. The earliest symptons of interference may be seen in the absence of the Vienna observations on July 26th, followed on the 27th by St Petersburg and on August 1st by Berlin. During the next few weeks the German stations disappeared one by one from the list. Swedish records also failed on the 1st and all Scandinavian ones on the 7th. From the 4th, part of the French records, including Belfort, were absent, on the 5th the Faeroes and Southern Europe were cut off. Brussels appeared regularly to the 16th but from the 17th to 22nd the Continent was practically unrepresented. The French observations mostly reappeared on the 23rd and on September 5th, the Norwegian records brought back something of the customary appearance of the Daily Weather Report."
MANCHESTER SUMMER INDEX for 2021: 238
Timelapses, old weather forecasts and natural phenomena videos can be seen on this site
http://www.youtube.com/channel/UCgrSD1BwFz2feWDTydhpEhQ/playlists