Well in the WWA the nws did mention the 1-2 inches for the advisory area which included Raleigh and Wake County :
Winter Weather Advisory
URGENT - WINTER WEATHER MESSAGE
National Weather Service Raleigh NC
348 AM EST Wed Jan 3 2018
...Snow expected to impact portions of central and eastern North
Carolina this afternoon through Thursday morning...
.Intensifying low pressure off the Carolina coast will bring a
threat for snow to the eastern half of North Carolina from noon
today through Thursday morning. Bands of heavy snow are possible
over eastern portions of the coastal plain late this afternoon and
evening.
NCZ010-026-041-077-086-032030-
/O.EXA.KRAH.WW.Y.0001.180103T1700Z-180104T1200Z/
Warren-Franklin-Wake-Harnett-Hoke-
Including the cities of Norlina, Wise, Afton, Warrenton,
Lake Gaston, Pilot, Ingleside, Louisburg, Franklinton, Raleigh,
Cary, Dunn, Anderson Creek, Timberlake, Duncan, Erwin, Angier,
Lillington, Antioch, Ashley Heights, Raeford, Rockfish,
and Silver City
348 AM EST Wed Jan 3 2018
...WINTER WEATHER ADVISORY IN EFFECT FROM NOON TODAY TO 7 AM EST
THURSDAY...
* WHAT...Snow expected. Plan on slippery road conditions. Total
snow accumulations of 1 to 2 inches are expected.
* WHERE...Warren, Franklin, Wake, Harnett and Hoke Counties.
