I remember the 1984 storm well. Of course because of the Colts. I lived approximately 2-3 miles south of the Colts complex in Owing Mills. I got about 2 inches of slush but it was quite a wintry scene that morning. Wind blown wet snow. I always wondered how Westminster faired with that storm. Now I know lol. I think we had a 2 hour delay that they changed into schools closed.
April 2nd/3rd 1990 2-4 inches fell in Pikesville/OwingsMills/Reisterstown corridor. Not sure How Carroll County did.
April 1996 maybe the 9th? We were under a winter storm Warning. The warning didn't verify but it did snow all day. 1-2 of slop in Reisterstown. Areas further North/Northeast however did do well.
Since I moved to Manchester in 2009 I can't remember an April where there weren't at the very least snow flurries/snow showers. Most years we have snow cover the ground in April. We had snow showers here in May of 2020.
The latest legit snow I can remember was in April 1993. Can't recall the date but pretty sure it was after the 10th. I was in Westminster because I attended Western Maryland College then and there was 2-3 inches. Snowed heavily all morning. Sane storm mid winter probably would've yielded 10 inches.