![]() They then had to hand contour the data to see what the radar saw several months ago. It might take months before they would receive back paper printouts of rows and rows of numbers that were the actual data. Then they would send those tapes off for processing. “They would figure out where the storm was that they wanted to observe, and they would use that to aim the experimental Norman Doppler. Kurt Hondl, Deputy Director of NOAA NSSL describes what that process might have been like. It was recorded on magnetic tape that then had to be processed on a computer before researchers could first see the data. No one saw the The Doppler radar data from Union City for a long time after the storm. But the early days of Doppler radar were quite a bit more cumbersome. Screens fill with colorful images that move and update, close to real time. You often see radar data on TV or you might even have a radar app on your phone. You might be familiar with today’s radar technology. NSSL researchers used the WSR-57 to direct Tornado Intercept Teams into position to observe the Union City tornado. This image is from a WSR-57, one of the earliest forms of weather radar. Early Days of Doppler Radar A radar image of the May 24, 1973, Union City tornado. These teams documented the lifecycle of tornadoes, including extensive timelapse videos, that when paired with the radar data captured by NSSL’s experimental Doppler radar, proved to be pivotal to our understanding of tornadoes. Researchers from the NOAA National Severe Storms Laboratory deployed as Tornado Intercept Teams to document the development of tornadic thunderstorms. That signature has gone on the be used operationally and helps get that lead time in tornado situations.” “That’s what we came to call the tornadic vortex signature or TVS. “The Doppler radar data revealed a rotation signature that appeared aloft in the storm 15, 20, 25 minutes before the tornado touched down,” said Burgess. The discoveries made that day laid the groundwork for decades of improvements to tornado warning lead time and the ability for forecasters to give the public more time to take life-saving action. The revelations from NSSL’s Union City research were the beginning of a new era of tornado forecasting and warning. Having that lifecycle data and not just snapshots was very revealing about what was going on with the storm.” “As storms developed less than 100 miles away, the Storm Intercept Teams were located in the vicinity of the developing tornado, we were able to get the entire life cycle of a tornado documented for the first time ever. “We had the facility here at NSSL ready,” said Burgess. With Union City a short drive away, the researchers at NSSL were in prime position to observe the tornado. Learn how to use the Weather app on your iPhone to check the weather for your current location or for other cities.Don Burgess, a retired NSSL researcher, remembers the lab’s efforts to use the then newly built, experimental Norman Doppler Radar to collect the data. If you use iOS 15.2 or earlier, you might see some temperature and precipitation data that's provided by The Weather Channel.ĭata for air quality maps is provided by BreezoMeter and QWeather. Temperature and precipitation map data is provided by Apple Weather. Next-hour precipitation maps are available for Australia, Ireland, the United Kingdom, and the United States. Temperature maps and 12-hour precipitation maps are available for most countries and regions. Air quality information for China mainland is provided by QWeather and reflects data from air monitoring stations. Air qualityĪir quality information is provided by BreezoMeter for Canada, France, Germany, India, Italy, Japan, Mexico, Netherlands, Singapore, South Korea, Spain, the United Kingdom, and the United States. The information is provided by Apple using data from national weather services. Next-hour precipitation forecasts and precipitation notifications are available for Australia, Ireland, the United Kingdom, and the United States. Severe weather information is available from QWeather for China mainland. Severe weather information is available from national weather services for Australia, Brazil, Canada, India, Japan, Mexico, Thailand, the United States, and most countries and regions in Europe. If you use iOS 15.2 or earlier, you'll see a 10-day forecast that's provided by The Weather Channel. A 10-day weather forecast is available for most countries and regions.
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