Pete Bouchard answered my messages about Ray (WHY does this only allow for a 92KB picture!? Ugh. I'll copy and paste) -
"Ahh...the old school measuring method. According to the NWS Chat boards, they thought it was overdone. Eric Fisher presumed he measured the snow from the previous storm? (Don't know where he got that info.) I asked on the board whether they would accept it, and they said since he wasn't Skywarn, they would omit it. Then it was posted again this morning before they again struck it from the list. Honestly, I can see how he could get 31. It's a tried and true method! And the RIGHT way to measure snowfall."