Did anyone get a WARN notice? - 17 weeks in

My employer announced that the site will close and gave us written notice. I do not know if I should start looking now or wait for severance news. Has anyone been through this?

Write down key dates and keep copies of the notice. Mine helped when a question came up later.

Thanks for writing this out. I went through something close to it 9 months ago, and it got easier once I kept a simple log of every call and form.