How can infrasonic observatories improve tornado warnings?
A 1995 observation of infrasound from an infrasonic observatory co-located with the CHILL Doppler radar in NE Colorado documented infrasound originating from the vicinity of rotation aloft, descending to the surface in the area of a tornado report. This observation led to a review of archived data, identifying over 100 cases where the directions and times of signals matched documented observations of tornadoes. Subsequent field measurements through the summer of 2002 continued to indicate that infrasound could be useful for severe weather warning.
