I've always followed the Laz Index: https://www.lazindex.com/fhsaa.php
For some of the newer posters, it's usually very good as the regular season comes to an end. I believe Laz uses the spreads of all the games, and then runs some sort of Monte Carlo simulation to give each team a power rating.
So basically Broward canceled games due to a hurricane that's completely away from them that's gonna hit the north could've played on Friday Broward has school on Friday