The remnants of hurricane Bertha could cause heavy rain and transport disruption on Sunday August 10 across East Sussex.
Yesterday the Met Office said at present southern parts of the UK are most at risk from the storms.
However it explained there was still a possibility the depression could move across northern France instead.
Chief meteorologist Paul Gundersen said: “There is still some uncertainty surrounding this weekend’s weather, with the potential for heavy rainfall, strong coastal winds and large waves on Sunday.
“However, there is still a chance that the system may pass to the south of the country giving the UK a brighter day.
“Rain and strong winds may well bring disruption, especially across southern parts of the UK, with the potential for more than 50 mm of rain and coastal gusts of over 60 mph.
“People should stay up to date with the latest Met Office warnings.”
The Met Office currently has a yellow severe weather warning for rain in East Sussex for tomorrow.
It explained this was a very volatile situation and this warning was likely to be updated as the event approaches.
The Met Office forecast for Newhaven is currently predicting gusts of up to 50mph with rain overnight from 12am until 11am on Sunday.