Two info:
- The wind was probably not -0.9, as this was the measurement which appeared as the runners reached 100m. Wind is officially recorded during 10sec from the moment when athletes enter in the homestretch (see the video of the race).
- Usain’s reaction time was 0.228 (in Beijing 19.30 it was 0.182). Imagine a good RT, 19.59 could be 19.49. Considering the terrible weather conditions, we’re getting closer to sub19.