How to trigger when certain numerical threshold is reached

[Lord0fBytes]

I am monitoring my local news website for school closings. There are always <10 closing on the site, but what I am looking for is a way to trigger the alert when the decimal changes to say 100 or more.
Here is what I have so far:
I am extracting text on the page using /.+?\d+ School Closings.+?/
I get the expected results: 8 School Closings, but I am stumped where to put in boolean logic to have it trigger the alert when the 'd' is greater than 50.

It also lists the schools with a specific tag that I could count, but again I am not sure how to count the rows and trigger after a certain amount.

[Lord0fBytes]

I looks like it might be able to work if I can get the xpath working correctly.
I am trying this xpath:number(substring-before(//text()[contains(., 'School Closings')], ' School Closings')) but since there is a lot of text on the page it doesnt quite grab the number correctly.