The Aggie Doppler Radar (ADRAD) is a Doppler weather radar located on the roof of the Eller Oceanography & Meteorology Building on the Texas A&M University campus in College Station, Texas. History The Meteorology department first began its study of convective storms with the use of a 3 cm wavelength radar in the early 1950s. In 1962, they upgraded to a 10 cm, and in 1966, dual wavelength capability was added. After several modifications, the radar was placed on top of the newly completed Eller O&M Building in 1973. In 1992, the Aggie Doppler RADar was born with the installation of doppler capability. A final upgrade to the pedestal, removal of the side dishes, new processor, and work station occurred in 1997. AN/CPS-9 In the early 1950s, the department received a 3-cm weather radar, AN/CPS-9, from the US Air Force. Using this 3-cm radar, researchers studied mid-latitude mesoscale systems, severe storms, and land-falling cyclones. The AN/CPS-9 model was the first purpose-built weather radar. April 5, 1956, tornado warning "The modified APS-2F at Texas A&M University, although not formally a part of the Texas Tornado Warning Network, was used at least once for warning purposes (Bigler 1956). On 5 April 1956, a tornado that produced damage in Bryan and College Station, Texas, was detected by the Texas A&M University radar. At noon that day, the Weather Bureau Forecast Center at Kansas City, Missouri, had issued what we would today call a tornado watch for an area just to the north of Bryan. The Texas A&M University radar observed strong, tall, hook-shaped echoes with V-notch signatures after 1400 LT. At 1445 LT, Texas A&M University meteorologists called the Bryan Police Department and forecast that a tornado would touch down 30 min. later. Actual damage started at 1509 LT. Texas A&M University also warned the College Station Consolidated School System, which decided to keep the children in their school buildings instead of releasing them at the scheduled time of 1500 LT. This is probably the first warning based solely on interpretation of radar data and is a good example of effective interaction between warning meteorologists and the local community. Today, with improved warning dissemination methods, increased community preparedness, and better radar capabilities and coverage, it would be less likely that a research team would be issuing warnings to communities directly." WSR/TAMU-1 and TAMU-ADRAD In 1962, a longer wavelength radar, 10-cm, was constructed and