Issued: 1000 Monday 22nd October 2018
Duty forecaster: David Hulse

Showers becoming wintry on northern hills. Overnight frosts

Some rain or drizzle in the north and northwest at first, moving south later on Thursday through into Friday, with much colder air following. Northern hills are likely to see a wintry flavour to showers with overnight frost starting to develop more widely.

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Thursday 25/10/18
A waving cold front over Northern Scotland will start to move south across England and Wales later. Perhaps some brighter intervals in the east but cloudier generally. Dry in the south and southeast but with occasional rain or showers in the north and northwest. Breezy in the north, with strong north or northwest winds later. Highs 11 to 15C. Localized frost in the north overnight.

Friday 26/10/18
A cold front over Southern Britain at first will clear away with a combination of high pressure to the west of Ireland and low pressure over Scandinavia establishing a cold northerly airstream. Cloudy in the south at first with some rain, otherwise a mixture of sunshine and showers. The best of the sunshine in central and, later, southern areas, the showers, turning wintry especially over northern hills, most frequent in areas exposed to the north or northwest wind, this strong around the coast. Highs 7 to 10C in the north, 10 to 12C in the south; overnight frost.

Saturday 27/10/18
A cold north to northeast airstream is maintained. Sunshine and showers. The best of the sunshine in the south and west, the showers, again wintry especially over northern hills, most frequent in areas exposed to the stiff northerly wind. Highs 7 to 10C; overnight frost.

Sunday 28/10/18
A ridge of high pressure to the west of Ireland declines, allowing low pressure and associated frontal troughs to make eastwards progress in the East Atlantic. Showers, still possibly wintry on some northern hills, will continue to feed into areas exposed to the north or northeast breeze, although this will start to ease later, the south and west having the best of the sunshine. Cold or rather cold by day; widespread overnight frost. Highs 8 to 12C; widespread overnight frost.

Monday 29/10/18
Low pressure and associated frontal troughs to the west of Ireland moving slowly southeast, whilst low pressure will move north towards Denmark. Bright or sunny intervals but with occasional light rain or showers in the east and north. Still cold or rather cold with an overnight frost away from eastern coasts. Highs 8 to 12C; overnight frost away from eastern coasts.

Tuesday 30/10/18
A slow-moving and complex low to the southwest of Ireland, with associated frontal troughs affecting western areas. Rain, some heavy drifting north across Southwest England, Wales and Ireland, possibly extending further east in the south later; mostly dry and bright in Eastern England. Occasional rain or showers over Scotland, especially in the east. Highs 7 to 11C.