Carlton Controls Corporation incorporated NASA's space shuttle technology into the development of the meteorological instrument called a barograph. This instrument traces historical ups and downs of barometric pressure and plots a rising or falling curve. Barorator provides a reading of barometric rate of change in millibars per hour. Information is provided to meteorologist every 15 minutes on an automatic printout. Tied in with other data, pressure rate of change information adds useful dimension for predicting exactly when a high or low pressure weather system will reach a particular locale. Also useful in tracing high altitude air movements such as jetstreams, it has special potential for predicting the onset of severe storms or tornadoes.