A severe weather warning for fog has been issued for Portsmouth this afternoon.
The Met Office is forecasting thick patches of dense freezing fog to appear throughout Thursday night, before moving away towards the south west on Friday morning.
Forecasters said the fog is likely to thicken up quickly because of a lack of cloud and wind.
The weather warning is valid from 4pm today until 10am tomorrow morning.
Driver are warned to expect tricky road travel conditions.