I posted this and then got busy so I am just now reading the replies. I
will try to respond to most of the replies in this message.

Airport is KOKC (Will Rogers International)
The location where the temperature change is noticed is SW 104th Street
which is just a hair over 1 mile south of the runway 35L and 35R.

We weren't thinking so much that the temperature change was due to the
down wash of air following the plane as it was the fact that at 30,000
feet the plane mass (which is quite a bit in an airliner) becomes very
cold and as it moves through the warmer air at the the lower altitudes
near the airport, it absorbs the heat from the air and therefore leaves
it colder than it was.

I do suspect though that as at least one poster suggested it may be due
to the fact that there isn't much development out there. If you look at
the satellite map, you will see very little development for a long way
south.

Another reason my dad thought this might be at least partially caused by
the aircraft is the fact that sometimes it is warmer there. In that
case he was thinking that the planes had been sitting on the ground for
some time and most of the structure was at least as warm as the ambient
air, then with the engines putting out full power for about 3 miles
before they cross the road, would be generating a lot of heat. So if the
planes were departing on runway 17L or 17R, it wold tend to warm it up.

However it could just be due to what direction the wind was blowing.
South wind blowing over mostly farm land and the river a few miles
south. Keeping it cool and a north wind blowing over the city, keeping
it warmer.


--
Chris W
KE5GIX

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