If Lane maintains a more westward trajectory like Hector did, it may pass far enough south of the islands to cause only showers, high surf and rip currents.
TS Lane is expected to strengthen rapidly, whipping up hurricane force winds by late Thursday or early Friday morning, likely becoming at least a Category 3 hurricane by the weekend.
Northern Ireland, Scotland and western England are all expected to feel the effects of the severe weather, which could potentially be upgraded to a hurricane today.
"It will be slightly stronger winds and a band of rain to Northern Ireland, Wales, North West and South West England".More news: Steel Serpent Shows His Power in Final IRON FIST Season 2 Trailer
Gusts will peak at 40mph around the United Kingdom late on Saturday and during the early hours of Sunday morning when the storm arrives over the UK.
According to the Met Office, Storm Ernesto will no longer be classified as a storm when it arrives in the United Kingdom, due to it losing some of its power as it heads across the body of water, but it will still impact on the United Kingdom with heavy rain and strong winds.
Belfast is forecasted for a peak temperature of 19C.
Britain has been subjected to "changeable weather" this week with heavy downpours, thunderstorms, strong winds and cooler temperatures dashing hopes of more warmth and sunshine.More news: China lodges WTO complaint over US solar tariffs
'Ex-Ernesto will then merge with an Atlantic low pressure system.
However, Sunday in Blackpool will then see heavy rain return from early morning to early in the afternoon.
Looking ahead to next week, however, warmer weather is expected to return throughout the United Kingdom, sending temperatures rising above average into the high 20 and 30Cs. It is also set to be warm and humid throughout the region on Monday.More news: Gunmen attack intelligence training centre in Kabul