The Met Office forecasts strong winds for the Western Isles with gusts of 65-75 mph expected.
"Very strong westerly winds are expected to develop through the course of Saturday in association with a deep area of low pressure, with gusts of 65-75 mph expected. There is a small chance that gusts in excess of 80 mph could occur across this region. Dangerous coastal conditions can be expected too, with large waves an additional hazard, especially in respect to causeways."
The public will be notified of any disruption to Comhairle services.
Advice
The public are advised to secure any loose debris and the construction industry is advised to secure scaffolding and any lose items on building sites.
The Comhairle would ask family, neighbours and friends living nearby to assist and support elderly and vulnerable people.
Scottish Fire and Rescue Service (SFRS) is reminding members of the public to take extra care if using candles during any power cuts which occur due to winter storms. In the event of a loss of 999 services, all fire stations will be manned by emergency services.
SSEN has contingency plans in place to deal with any damage the storm may cause to the electricity network. Any customers who lose their electricity supply are urged to contact SSEN on 105 to report damage or highlight neighbours or friends who may need extra help.
Travel
Please take care and drive to the road conditions. Comhairle nan Eilean Siar's Roads team, Coastguard and Police will be monitoring all causeways.
Ferry services may be disrupted. Please keep an eye on the CalMac website for further details.