This movie inspired so many stormchasers and new inventions
You should see what real-life stormchasers use nowadays. Many even came up with better versions of "Dorothy," some of which, didn't need to sacrifice a car in order to get into the tornado. They now use cone or dome-shaped probes that they can leave in the path of the tornado. The cone/dome shape works like an airplane wing stuck on the ground, so then the tornado's winds press down on it and keep it in place while it measures air pressure and wind-speeds. Some of these probes even have cameras hidden inside to film the tornado through bullet-proof glass as it passes over.
Even better, there's a crazy guy in the late 2000s who invented the Tornado Intercept Vehicle, basically a truck with a massive steel and titanium shell built over it, as well as anchors to hold it to the ground. It can withstand tornadoes up to EF-3 strength, with later models of the TIV possibly even able to withstand EF-4 strength winds. The TIV has even been tested on two different tv shows, "Storm Chasers" and "Mythbusters" and has been proven to work. Only issue is, due to its size and weight, it's a gas guzzler.
Another cool invention that came about the same time as the TIV was the Doppler On Wheels (DOW for short). It's a truck with its own Doppler radar dish, and provides data that is linked up with satellites to provide real-time information about thunderstorms and tornadic activity. For a long time, storm-chasers often had to rely only on satellites and what local weather stations could tell them, and the information was always behind what they needed, or they had to use very expensive equipment to get satellite data to their computers (early use of the laptop for scientists was done in the 80s and 90s due to storm-chasers being on the road a lot). Now the DOW (as well as cell phones) makes it much easier to track tornadoes in real-time for well-equipped storm-chasers.