I read thru this in the past and I think I linked to it once. I dont live in a transition zone, and I could not find a ton of info in the past. The following is just my opinion.
Pushing fertilizer (synthetic or organic) when the lawn is in heat stress causes more problems than benefit. This forces the lawn to produce more top growth when it is trying to survive. If you have irrigation with good coverage, you might be able to push it a bit more than without it. I personally change to lower qty nitrogen and more frequent once temps approach 90F. I then stop once the temps are above 90F.
One benefit that you normally have (not this cold year) is that your lawn doesnt really go dormant, so you could/should still apply nitrogen in the Winter (they recommend a pound in February).
Pushing fertilizer (synthetic or organic) when the lawn is in heat stress causes more problems than benefit. This forces the lawn to produce more top growth when it is trying to survive. If you have irrigation with good coverage, you might be able to push it a bit more than without it. I personally change to lower qty nitrogen and more frequent once temps approach 90F. I then stop once the temps are above 90F.
One benefit that you normally have (not this cold year) is that your lawn doesnt really go dormant, so you could/should still apply nitrogen in the Winter (they recommend a pound in February).