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amber Warnings have been issued for the United Kingdom

East Highlands

Weather hazards over 300m on Wed 22 Feb 2017

High risk

Gales
Over higher ground for much of the day before easing during the evening.
Severe chill effect
Significant throughout much of the daylight hours.

Medium risk

Persistent extensive hill fog
Cloud bases up and down in association with showers.

Low risk

Storm force winds
Across the tops during the morning.
Thunderstorms
Mainly across the north during the morning.

No risk

Blizzards
none
Heavy snow
none
Heavy persistent rain
none
Strong sunlight
none

Wed 22 Feb 2017

Frequent, and occasionally heavy, snow showers across northern and western ranges with perhaps the odd rumble of thunder, although some brighter spells between the showers. Fewer showers and some sunnier spells across the southeast, particularly the Perthshire hills. The showers then becoming lighter and less frequent during the evening.

Time
0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Heavy snow shower day Heavy snow shower day Heavy snow shower day Sunny intervals Partly cloudy night Partly cloudy night
Precipitation probability
50-70% 50-70% 50-70% 30-50% 20% 10-30%

Visibility

Vary variable; near whiteout conditions in snow showers/strong winds, but some good clarity between the showers, with very quick changes from one to the other at times.

Hill Fog

Occasional fog at 500m, with patches down to 350m near heavier showers, but more scattered in the southeast. Then becoming isolated above 700m during the evening.

Max wind above 600m

Westerly 50mph gusting 70mph across the highest peaks, easing through the day and becoming 15mph later in the evening.

Temperature

Valleys:
Around zero Celsius rising to plus 6 Celsius in the afternoon.
800m:
Around minus 2 Celsius.
Freezing level:
Around 550m.

Thu 23 Feb 2017

Cloudy with quite persistent snowfall across many ranges during the morning, this heavier across the south and east. However far northwestern hills likely to see lighter and patchier snow. The more persistent snow clearing for a time during the afternoon, but winds strengthen as it does so, possibly allowing drifting of fresh snow. Then another period of snow developing during the evening.

Visibility

Often very poor in the more persistent snowfall during the morning and then again in the west later, but slightly improved across the northwest, and then more widely for a time during the afternoon, although poor in any blowing snow.

Hill Fog

Persistent above 500m during the morning away from the northwest and occasionally down to 200m in more persistent snow. Cloud lifting and breaking for a time as the main system moves away but lowering again during the evening.

Max wind above 600m

East becoming northeast15-20mph, then backing to a north or northwest 20mph with gusts 45mph possibly across the south.

Temperature

Valleys:
Zero Celsius rising to plus 7 Celsius.
800m:
Minus 3 or 4 Celsius.
Freezing level:
200m rising to 600m for a time.

Fri 24 Feb 2017

A drier and brighter day with only a few showers during the morning, although clouding over from the west during the afternoon/evening with sleet and snow spreading in. Lighter winds than previous days, although strengthening by evening. Freezing level around 200m, rising to 400m later.

Sat 25 Feb 2017

A band of rain, preceded by snow continues to spread from the west. This heavy at times and allowing a significant thaw to develop for a time. This then clearing during the afternoon with colder air and a few wintry showers following. Freezing level initially 400m, rising above the summits during the day and then back to 700m by evening. Gale to severe gale force southwesterly winds over the hills.

Sun 26 Feb 2017

A mostly dry and cold start but another band of rain, preceded by snow moving in from the west. Strong southwesterly winds continuing with freezing levels rising from 700m to around summit level.

Issued at: 0202 on Wed 22 Feb 2017