Bramall Lane is currently closed due to the heavy snowfall that has hit the city over the last three days and the club are in consultation with the local authorities, the Football League and Reading.
The Blades' safety and estates officer Steve Hicks said: "With the continuing lack of improvement in the weather and less than favourable forecast, serious doubts are emerging about whether the fixture with Reading at Bramall Lane on Saturday will go ahead, owing to the build-up of snow on the terraces and surrounding areas.
"We will keep supporters up to date with the latest developments via this site, on twitter @sufc_tweets and through the local media."
Source: PA
Source: PA