With thanks to Kevin at the Whitchurch Ticket Office:
South West Trains are running their adverse weather timetable tomorrow (Friday 17th January)
Trains to Basingstoke, Clapham Junction and London Waterloo will depart hourly at XX:55
Trains to Andover and Salisbury will depart hourly at XX:30
Note that if you normally go for the usual timetabled trains you may end up waiting around three-quarters of an hour!
Train times can be checked at:
A decision on the weekend will be made later on Friday.