This two-part article gives an overview of Doppler ultrasound technology, then goes into a more technical discussion of verifying the signs of COVID-19 stroke through imaging
the first warning came out at about 2:40 p.m. the first touchdown, we watched it on tv, about 2:53 to 2:55 p.m. so a few minutes notice for newcastle and it continued to drive itself right into moore. there is the hook echo. we talk about the hook. this is the rotation. this is the semicircle, the hook right there that is the most dangerous part of the storm, and the tornado would be right there, right at that point, right on that right there. even something called today a debris ball. we use this term that s new because we have new doppler technology. the doppler can actually pick up the fact that it s not rain that s coming down, it s shingles that are coming down, tree limbs, leaves, insulation, whatever. that s called the debris of a tornado vortex signature. it s the debris of the tornado. we saw that ball heading right toward downtown moore and it moved very slowly. it seemed like it took hours. we were watching it one after
there s a circulation. the technology can predict a tornado between 10 and 15 minutes before it hits the ground. 1880. what was the dissemination? a newspaper. would you really print a newspaper on wednesday predicting tornados on thursday when you didn t have a satellite? didn t have any kind of information at all. certainly, they weren t qualified to predict tornados in 1880, but by 1950, they were much better with the doppler technology. so, carl, explain this. you have this technology and yet you have these deadly tornados. why? part of the reason chad mentioned is you re still looking at 10, 15 minutes warning time in advance of a tornado. contrast that with a hurricane when you have two to three days notice, there are path trackers. with a tornado, it s still a short amount of time. now, we have several technologies available to us. those have pros and cons of their own.