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![Weather Service Bulletin No wea03673.jpg Weather Service Bulletin No](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_wea03673.jpg?itok=F6oEe2zU)
Description
Weather Service Bulletin No. 8, 1949. P. 22. Cloud base and topradar indicator developed allowing cloud heights to be determined directly above the observer. Shows time series of thunderstorm with cloud tops atapproximately 45,000 feet. (Image credit: Headquarters Air Weather Service; Courtesy of the family of Nels Johnson, United States Weather Bureau (dec.))