Chance of second 2020 snowfall in Blue Mountains

Blue Mountains residents could be enjoying a second snowfall for the year tomorrow (Tuesday, June 2).

The Bureau of Meteorology has forecast possible snow above 800 metres in the morning. It stated there is a 20 per cent chance of snow in Katoomba.

The weather forecast saw the Blue Mountains State Emergency Service issue a travel warning for motorists.

"This is a reminder that since the Blue Mountains experiences infrequent snow events, many locals and travelers are not prepared for snow conditions unlike our colleagues in the Alpine regions," the unit posted on its Facebook page. "So we have created a guide to assist people that need to travel in snow events.

"The NSW SES urges that people should avoid travel in these conditions. Even if it does not snow, black ice may form on roadways in the early morning which is very hard to see. Black ice then may cause motor vehicles to slip whilst driving along."

The forecast follows snowfall in parts of the Upper Mountains on May 21, which caught many residents by surprise. It wasn't long after dawn that many rushed out to parks and ovals while there was still ample around to fashion into snowballs or take to a toboggan.

The Bureau of Meteorology forecast had been for an 80 per cent chance of showers possibly falling as snow before sunrise.

It was spot-on, with snow starting to fall in Blackheath just after midnight.