β Scribed by S. Morris Bower
No coin nor oath required. For personal study only.
The weakness of the definition of a day with a thunderstorm as any civil day on which thunder is heard at a station, and the great difficulty of interpreting data on such a basis, is illustrated. An example of a thunderstorm chart based on the daily areas of overhead thunderstorms drawn from a close network of recording stations is presented and is compared with the βthunderβheardβ results. A method of producing detailed period and average maps, published as County Thunderstorm Surveys, is shown. The similar charting of daily areas of lightning damage provides a convenient and reliable method of examining the distribution of storm severity, and has many practical applications.
Analyses of thunderstorms on individual days by means of hourly isochrones, published as Daily Thunderstorm Charts, present new opportunities for detailed comparison with rainfall maps and with radio thunderstorm recordings.
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