Hey, Bird Dog. That was not a tornado you experienced on Monday. That, I believe, was a Microburst. Most people have never experienced them, so you are a lucky one.
Microbursts are violent, brief (10-15 minute), very localized downdraft weather events with the power of tornadoes.
As one guy reported on his experience of one of these,
Microbursts are caused by a collapsing thunderstorm. What happens is, a thunderstorm rides up and over some hot dry air. This causes the rain that the thunderstorm is trying to drop to evaporate, which in turn, causes that hot dry air to suddenly cool off. Cool air falls fast, in fact so fast in this case, that it steals all the energy rising up into the thunderstorm. The sudden downdrafts cause all of the storms energy and moisture to drop in place. It would be kinda like placing a bunch of the little green plastic soldiers on your patio and then standing up on a picnic table, pouring a pitcher of water straight down on them. As the water hits the concrete, there is no where for it to go but out sideways with great force. That is what causes all the wind damage.
It is very hard to predict a Microburst. Later, the ABC station showed their Viper Radar loop. Indeed, there were sheer indicators that popped up right over us right as the Microburst occurred. It only showed on radar for about a minute or two and then was gone, but it sure did a bunch of damage in the short time it was here.
