On 3/8/2013 7:01 PM, Michael A. Terrell wrote:
....

Tune to channel 13 and turn the brightness control down to the point
where the image is nearly--not completely--black. Then turn to channel
2. Lightning will register as horizontal streaks on the screen. When the
picture becomes bright enough to be seen, or when the screen glows with
an even light, there's a tornado within 20 miles, ...

What makes you think that's even remotely likely to be so? Lightning
isn't at all necessarily indicative of tornadic activity--certainly
tornadoes are spawned from t-storms, but I'm pretty sure it's news to
the folks in Norman (NOAA severe weather office) there's predictive
capability in the lightning...

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