A bust is a slang storm-chaser term used for a 'wasted chase', i.e. if the chasers/observers are unsuccessful in seeing anything happen with a thunderstorm/tornado. Suffixes to show other info can be added to show other events in the storm.... H = Hail T = Tornado F = Funnel Cloud L = Large Hail (greater than 1cm diameter) C = All lightning within clouds (no CG)....(to be use if non CG is counted) B = Ball Lightning reported S = Snow or Sleet Examples: Typical April Showers: SO0H - Non thundery Hail shower SO2CH - Thundery (non CG) storm with Hail Recent events: SO1 - Rain storm that I drove through to London the other week Summer Storms: SO4 - Straight storm (perhaps a bit remote) SO7H - A nice example of weather!!! Oklahoma: SO6LT - Tornadic supercell with large hail (not always too thundery) Florida: SO10 - Hyperactive storm that storm enthusiasts dream of. Please feel free to use this table on your website. If you have any suggestions or modifications to the table, please let us know by email. You can also view the black and white version of the table here or download the table for MS Word here. This scale has been devised by Mark Lovegrove (UK) and Mike Miles (UK). It is only a rough guidance to the type of thunderstorm (in size and in distance) that you may be experiencing. We have worked to make it a universal scale.