Jhieminga,
The only reference i can find for that is it means "Snow Ended"
Try putting a couple of these metars into a decoder which ive linked to below and you'll see what I mean.
METAR KAVL 191554Z 01005KT 1SM BKN009 OVC036 M01/M01 A3014 RMK AO2 SNEMM PRESFR SLP217 P0002 T10061006
KAUG 200553Z AUTO 34007KT 1 1/4SM BR FEW001 OVC006 M12/M14 A2979 RMK AO2 SNEMM SLP097 P0001 60005 T11221139 11111 21128 58041
http://www.wx-now.com/Weather/MetarDecode.aspx