I thought he told you earlier that he has been a lurker and just started posting. Sounds to me like he's done enough reading. It's his reputation on this forum that will rise or fall on his predictions. He must be aware of James.
I will say this about that 18z GFS run - that is one cold Canadian air mass near the end of that run, with temps in C Manitoba getting to -50°F to -55°F at night and not getting above -20°F for days at the beginning of March.
While we torch up here, down in Houston in the next couple of days they may break their all time low records, 5°F in 1930, and their low max of 20°F in 1899.
At hr60 and hr66 on the GFS @ 850 they are 4C and 7C warmer than the 12z Ukie @ hr66 and hr72, at least for my hood. We will see which is correct, if either .
What's interesting about the Ukie is that after that 0z warm burp run last night, it went back to what it had shown for the most part in the prior 4 runs.