An upper level trough will be exiting to the east of Ohio early Friday, which will put north-central Ohio in a dry northwesterly flow. At the surface, high pressure will be building in from the west, producing a north wind that will keep temperatures cool despite abundant sunshine. After a chilly start to the day, afternoon highs will only reach the upper 60s. Saturday looks much the same, with maybe a few more high clouds and slightly warmer temperatures as the high shifts to the east.
Most of Sunday will be very nice, with the warming trend continuing as highs will reach near 70. There will be increasing clouds through the day due to a low pressure system approaching from the west. At this time, the rain with this system is expected to hold off until Sunday night or Monday, so I don't expect any impacts on the Sunday afternoon racing. However, if the models shift the timing a little earlier, I may need to add a chance of rain with later forecast updates. Stay tuned.