Also in this playlist...
This transcript is automatically generated
TSB investigators trying to piece together what went wrong with the -- on a flight in San Francisco as they look at technical factors.
Attention is turning away now from what's known as -- this year.
In focusing instead on a weather phenomenon called a micro burst which we're gonna explain in just a moment joining us now.
Is -- Mike Smith who is a meteorologist to has vast experience on this subject.
And there you see.
What is essentially hour -- Diagram of what happened.
Mike explain to me first of all.
Why this is not win this year.
In order to get a micro burst -- you have to have a thunderstorm or thunderstorm related clouds.
We didn't have -- San Francisco yesterday it was actually a very -- -- -- flying with stable air.
And -- very good atmosphere -- flying light winds clear skies -- disability.
So we know it wasn't -- burst because we didn't have the right kind of wild spoke one.
Right now talk to us a little bit about micro bursts.
A generation ago in the seventies and eighties.
Mike will burst with a number one cause of commercial.
Airline accident we were losing a -- about every twelve to eighteen months.
We didn't understand it until doctor Ted Fujita came along you hear -- -- associated with the computers scale when tornadoes.
He discovered this type of contents.
Change in wind speed and wind direction that we caused all of micro burst.
-- -- Are much more susceptible to -- burst -- this year.
-- propeller -- playing so you have in the 1950s.
When it and the propellers were common.
They were affected by them but he checked because it slice through those rapid changes in wind speed and wind direction.
Would lose altitude and crashed short of the -- -- And because they would crashed short of the runway.
That's why people put two and two together mistakenly.
And -- yesterday's crash -- San Francisco.
Might be a Michael -- But you -- you see no sign of that.
You know trying to aren't certain there was no micro -- and ball online and pilots are now well equipped to be able to detect.
Mike for a -- and wind shear in advance.
Yes thanks to the work of doctors who -- us.
-- doctor John McCarthy and a number of other researchers.
We have the technology in place to let the pilots know when a micro -- might be present -- -- stay away from it.
And then the pilots are taught how to get out of it if they accidentally wander into one.
And you took a picture of the down burst but we're gonna put that on the on the television take a look at this here it is now explain what we're seeing here -- That's one of the most famous photographs -- in the history of -- urology.
That is theory was very controversial.
A lot of meteorologists didn't believe -- micro -- existed.
What happened to be outscored chasing with the print and got this photograph of a micro burst which -- -- Ted boutique this hypothesis that they existed and you concede the rain is actually currently up -- and that's just part of the wind shear.
That would lift the playing above the glide slope you talked about the glide slope earlier in your newscast and then slam it down to the ground.
All right Mike Smith.
-- meteorologist thank you so much for being with us appreciate it.
Filter by section