"The periods for which the wind velocity shall be measured from the
flash of the Starter’s gun or approved starting apparatus are as follows:
Seconds
100m 10
100m Hurdles 13
110m Hurdles 13
In the 200m event, the wind velocity shall be measured for a period
of 10 seconds commencing when the first athlete enters the straight."
Wow. That is hilarious. For athletes such as Bolt and Gay, the wind reading is still being conducted for over a second after they have finished in the 200m (over 10% of the total time over which wind readings are taken) and for close to half a second in the 100m. Is it the same in masters events so that wind is only collected for 2/3 of the race? Too funny.