The archetypal named tempest of the season, Storm Otto, is battering parts of Scotland and England.
The Met Office said winds would scope speeds of 60-70 mph - arsenic precocious arsenic 80mph connected exposed coasts successful bluish Scotland.
A yellowish informing has been issued from 03:00 to 15:00 for astir each Scotland and different from 05:00 to 14:00 for the Borders and northbound eastbound England.
Potential impacts see ample waves connected North Sea coasts arsenic good arsenic a accidental of immoderate harm to buildings
Ferry relation CalMac warned customers of disruption to services betwixt Scotland's westbound seashore mainland and islands.
Network Rail Scotland said velocity restrictions could beryllium imposed connected immoderate routes.
Electricity institution SSEN said the worst of the upwind was expected to deed the Caithness, Orkney and the Western Isles.
More than 130,000 customers connected its precedence services registry person been contacted with tempest advice.
The Mountain Weather Information Service described it arsenic a almighty Atlantic storm, informing that upland areas from Scotland to the Pennines could spot gusts of up to 100mph.
Met Office main meteorologist Andy Page said: "Storm Otto volition bring precocious winds and rainfall to the UK, with immoderate bluish parts of Scotland and the northeast of England apt to get the strongest gusts of wind, perchance successful excess of 75mph.
"There's a accidental of question disruption and high-sided vehicles could beryllium peculiarly prone.
"There's associated rainfall with Storm Otto, with 40-50mm apt to autumn implicit parts of occidental Scotland."
The tempest was named Otto by the Danish Met Office. The UK Met Office has adopted the aforesaid name.
It is the archetypal named tempest to deed the UK since Franklin past February.
The Met Office's play for named storms runs from September to September, and the names are fixed to rise consciousness of terrible weather.
Earlier this month, flights and ferry services successful the Highlands and Western Isles were disrupted by 75mph winds.