Good afternoon all the Met Office has issued a yellow weather warning for Ice from 17:00 Thursday evening until 10:00 Friday morning.
The full warning and latest updates can be found here https://www.metoffice.gov.uk/weather/warnings-and-advice/uk-warnings#?date=2020-12-04
Here is the councils gritting policy https://www.cne-siar.gov.uk/media/7301/wintermaintenancepolicy.pdf
This is the road gritting priority times https://www.cne-siar.gov.uk/roads-travel-and-parking/roads-maintenance-winter-gritting/road-gritting-priorities/
Please do NOT use Western Isles Weather for the protection of life and property please follow local and national government issued warnings and advice. Please have more than one source for weather information in extreme weather, Such as the Met office.