In rec.aviation.student B A R R Y wrote:
Most of the non-towered fields I use have either an AWOS or ASOS
(maybe Belfort? G), that updates every minute, but the same caveats
apply about the location of the instrument taking the reading vs. the
runway.

Besides that, the wind can *change* between the time the reading is taken
and the time you flare.

I went up for some crosswind practice the other day, and the winds were
really squirrelly -- changing constantly, and very different at altitude
and on the ground.

Every few minutes, somebody would key the mike to get a wind check from
the local reporting station on the CTAF. Each time, the winds were
noticeably different, both in direction and strength. It was kind of
funny, and, while I paid attention, I didn't count on the information
still being correct while I was landing.

Each landing was different from the one before, and I had to pay attention
to the winds each moment, and react to what they were doing there, not
what they were reported to be.

Which made it a lot of fun, of course.

.... Alan
--
Alan Gerber
PP-ASEL
gerber AT panix DOT com