I read through those documents. There is also one at Univ of Tennessee. http://www.tennesseeturfgrassweeds.org/Lists/Fact%20Sheets/Attachments/32/D5%20winterkill%20PRE.pdf
I'll sum up the message, as I took it, for anyone who doesn't want to read the documents.
If you didn't prepare in fall, it's probably too late (Read the documents if you want input on how to prevent winter kill next year).
Choices for this spring:
1.Apply pre-em at normal time, hope no/minimal winter kill, and if there is winter kill, your pre-em may impair recovery.
2a: Hold off on pre-em until after spring green-up. If there is minimal damage, apply pre-em, expect to use more post-ems to control grassy weeds.
2b: Hold off on pre-em until after spring green-up: If there is substantial damage, plan repair/renovation, good luck.
I'm going with option 1. I don't have any traffic on the grass. I raised the HOC going into fall. I have plenty of potassium in the soil. I'm not running a golf course or athletic field where recovery downtime would be an issue.
Also, there is a good document from Oklahoma State.