Am curious if it would be possible to add additional designations to the sheets.

For example,

xc = extreme cold (sub-freezing temperatures)
xh = extreme heat (over 85 degrees)
r = rain (race is during precipitation exceeding a drizzle)
hw = heavy wind

I feel like some horses very much like or dislike conditions like these and where the day is an outlier from a whether perspective, that is useful information for interpreting a particular figure.