It varies widely. In some cases a tornado can be heard over a mile away, in other cases you can't hear it until it's just about on top of you.
please use complete sentences and words... "for m a tornado" makes no sense
It is safest to stay underground if you hear/see a tornado.
From 10 meters away .
200 kHz
That depends on how far away the next destination is and how fast the tornado is traveling.
a lynx can hear a prey from 65 metres away
"Hear" They can HEAR something up to 5 miles away
25 miles away
almost instantly.
ultrasonic
2 miles
yes they can, they can actually hear people from really far away