I was thinking the same yesterday, this winter was similar to 91-2 - a nothing winter with high pressure close by. I have some old photos (pre digital era) taken on April 4th '92 showing heavy snow lying in Glencree in the Dublin mts.
I also remember a fairly heavy fall in mid April 1998 after a winter also similar to this nothing winter.
Your mum may be right? (sure aren't mammies always right!)