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Life-Saving Advances in Tornado Detection Since 1974 Outbreak

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weather, tornadoes, tornado history, safety
This image of a school bus thrown into a private garage by a tornado happened in 1974. (Image credit: NOAA.)

This article was provided by AccuWeather.com.

The most violent tornado outbreak in U.S. history based on the number of EF-4 and EF-5 tornadoes occurred on April 3-4, 1974. There were 148 confirmed tornadoes during the outbreak. When it was over, 315 people were dead and 6,100 others were injured. Damages from the tornadoes were estimated to be a half billion dollars.

Since the devastation of those tornadoes, storm prediction has improved greatly. "Back in that era, radar was a patchwork of WRS-57 and WWII radars. There were many places in the U.S. that had no radar coverage at all," said AccuWeather Senior Expert Meteorologist Mike Smith.

RELATED: Personal Account: Helping Victims of the 1974 Tornado Outbreak in Xenia, Ohio Advances in Weather Radar Since AccuWeather Was Born Anniversary of 1974 Super Tornado Outbreak

"The radar that was available was in black and white. Because of this, the tornado that hit Xenia, Ohio did not show up well," Smith said. "A thunderstorm that was detected on radar would only appear on the black and white screen for less than one second." It would be two more years before color radar was invented."

"Only the weather stations who owned radar equipment were able to view the radar. This severely limited the availability of information that could be used to forecast severe weather outbreaks. "The TV stations that had radar were few and far between," said Smith.

This photograph shows the damage to the Audubon Elementary School caused by the 1974 Super Tornado Outbreak. (Image credit: NOAA.)

Another problem during the 1974 tornado outbreak was an issue with the wire service provided by the NWS. The problems prevented some warnings from going out to the places at risk, according to Smith.

Today, we have color radar, Doppler radar and dual polarization radar. Color radar enables the meteorologists to detect the signature hook that may indicate tornado activity. Doppler radar senses wind and the dual polarization radar is able to detect debris fields produced by tornadoes.

Smith said, "The most important advancement to radar since the Super Outbreak is the fact that radar can now be viewed from anywhere."

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