Weather Service Bulletin No. 8, 1949. P. 22. Cloud base and top
radar indicator developed allowing cloud heights to be determined directly above
the observer. Shows time series of thunderstorm with cloud tops at
approximately 45,000 feet.
Image ID: wea03673, NOAA's National Weather Service (NWS) Collection Photo Date: 1948, July 23 Credit: Headquarters Air Weather Service; Courtesy of the family of Nels Johnson, United States Weather Bureau (dec.)