I am uncertain of your information source, but I cycled over the Stelvio on Sunday, from Glorenzo on the Austrian side down into Bormio, whilst there is still a meter of snow on the side, the road is completely clear and the cafes at the top are all open now.
Coming soon the new 2019 season
OPENING THE STELVIO GLACIER
LIFTING PLANTS OF THE STELVIO GLACIER (2760 meters – 3450 meters)
From Friday 7 June open facilities from 7 am to 12 am
STREET INFORMATION:
From Thursday 6 June open from 06.00 to 12.00 (reduced time due to avalanche danger)
the Stelvio Road on the Bormio side (Bagni Vecchi) – Quarta Cantoniera
From Thursday, June 6, open from 14.00 from Switzerland, the Umbrail road.
From Thursday 6 June open all the time the Quarta Cantoniera Road – Passo dello Stelvio.
The Bolzano side road remains CLOSED until further notice.
In case of changes you will be promptly updated.
Plus web cam has been showing a barrier of snow on the steeper side??