I'm sorry, but I would like some documented proof of this.
That was with the old formula. It's extremely well documented in 1996. The entire state got school called off by the governor for a day or two because of how cold it was.
I don't know if this gives the old formula numbers, but in Tower, MN it was recorded at almost -100 one day
Cold Mid-January
"THE COLDEST MINNESOTA TEMPERATURE EVER RECORDED WAS MINUS 60 WHICH
OCCURRED AT TOWER ON FEBRUARY 2, 1996"
That's just temperature, not wind chill
"On the same date that the Minnesota state record minimum temperature
record was set on February 2, 1996 (-60 near Tower) Governor Arne
Carlson cancelled schools for cold a second time. In the Twin Cities at
6am February 2, 1996 the air temperature was -30 degrees F with a wind"
Historic Wind Chill Temperatures in Minnesota
It's not giving the wind chill data, but it's somewhere online. Give me a little time to find it.