Microburst / Windshear

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Microburst / Windshear
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Windshear is any rapid change in wind direction
or velocity. Severe windshear is a rapid change
in wind direction or velocity causing airspeed
changes greater than 15 knots(17mph) or
vertical speed changes greater than 500 feet per
minute (around 5-6 mph in the vertical direction
that is a lot).
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The life span of a Microburst is around 15-20
minutes.
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Wind variations at low altitude have long been
recognized as a serious hazard to airplanes
during takeoff and approach.
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So you can see that a sudden change of wind speed
can change the airspeed and therefore, change the
amount of lift keeping the airplane in the air.
If the airplane is going slow, like on take off
or landing, this can be very dangerous.
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This is not a cloud it is dust and dirt
picked up by a GIANT microburst!!!
Here comes someone stupid!!
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AIRSPEED GROUND SPEED or - WIND SPEED
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Wingtip Vortices
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