Good afternoon. This morning the Met Office extended its wet weather warning for rainfall to cover the Western Isles. It is a yellow rainfall warning. The warning came into force in the early hours of this morning and expires at 0900 Tuesday morning.
They are expecting 20 to 40 mm of rainfall to fall widely in the warning area.
For the very latest updates and full warning can be found here https://www.metoffice.gov.uk/weather/warnings-and-advice/uk-warnings#?date=2020-10-19&id=95855521-23c1-4b96-b08a-c1cd950534bf&details
The Scottish Environment Protection Agency has also issued a flood alert for the Western Isles but the main areas of focus are Lewis and Harris.
The full alert and latest updates can be found here https://floodline.sepa.org.uk/floodupdates/info/group-id/4964/
Impacts for the islands
Looking at the two main models this morning the GFS is suggesting 40 to 50 mm widely across the Western Isles till midnight Wednesday from 0600 Monday morning. This is a little bit higher then what the Met Office is suggesting at this stage. The EC model is keeping it between 30 to 40 mm widely with up to 60 mm for Barra. Again 30 to 40 mm it roughly what we would expect and is line with the Met Office thinking however the 60 mm on Barra seems a little on the high side but worth keeping an eye on. This covers from midnight Monday till Midnight Wednesday.
I will keep you updated as things progress any warning updates and I will post rainfall totals later in the day.
Please DO NOT use Western Isles Weather for the protection of life and property. Please have one or more methods of getting extreme weather information. Please follow any and all instructions given by Emergency Services and Government advice.