Probably not. If the issue was serious enough to interest the police at the time, it is likely that you would be required to remain and answer.
Usually something like this would be measured by a 'reasonable man' test, meaning 'how would a reasonable man act' in the situation. It is also likely that the court would find your action (running) to not be reasonable if a reasonable man (the officer) felt it was not necessary to run away. If you have reason to believe that the place you are in is unsafe, you should inform the officer.
If you can see the tornado
To a limited degree. It is possible to detedct a tornado and its immediate precursors with Doppler radar, but this cannot tell when the tornado will touch down, how long it will last, or if it will change course. Beyond this, weather conditions can tell if a given areas is at risk from tornadoes on a given day, but cannot tell where indivitdual tornadoes will strike.
No. If a tornado is coming you will not have time to board up your windows.
yes!
It can be purple or any other color. The color of the lightning has nothing to do with whether or not a tornado is coming.
There is no way of knowing when the next tornado will be in any given place.
There is no way of knowing that.
"Prayer time"
Many people do not may attention to there being a tornado watch, as it does not inidicate an immediate threat of tornado, so many people go about their ordinary business. A tornado warning often means that a tornado is minutes away from htting. So it is no so much that people go to the store as much as, they just happen to be there when the warning is issued. If a person is outside or in a car and a tornado is coming, they will often go to the nearest permanent building, which in some cases is a store.
If a tornado has formed in the U.S. chances are it will be detected by Doppler radar.
it is unpredictable to tell what a tornado's path will be it could be coming right towards you then out of no where turn
No, I won't. I would get myself evacuated from the tornado area.