I thought I aswered this, but perhaps it was digressing a bit. My answer would be no, they are not different, WU and VWS appear to use same calculator
My website shows -11.3c wind 12.6km, wc -17.7 (values provided by VWS)
The noaa calulator gives that as well. EC calculator rounds up to -18.
I went on WU for your town (Wakefield, MI). Its shows -10.6c wind 11km, and a wc of -16
The noaa calculator gives -16.3, EC calc shows -16
Not sure why your live VWS display and WU were not in agreement. Are they close now that its not -13f anymore
I do notice that the rapidfire ones do not appear to be accurate, so it is possible that WU picks a time to use the wind speed from.
Andrew
Just to clarify, my question is why does my VWS display show a very different WC reading then WU is displaying?
Even checking a neighboring PWS site on WU with both mine and his showing identical temps and about same wind speeds, we had a 12 degree difference in WC readings on the WU display. And neither were same as my VWS display which of course changes as wind speed was changing (temp was constant).
Thanks for everyones input so far.