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Thursday, 5 December 2013: dawn to dusk
Printable view Forecast issued: 0335 on Thursday, 5 December 2013
Very windy, perhaps stormy for a time. Brighter but much colder later, with increasingly wintry showers.
|Heavy snow||Low||Colder by evening, with locally frequent showers from the northwest, gradually turning to snow.|
|Storm force winds||Medium||Storm-force gusts are possible for a time in, and immediately following the heaviest rain.|
|Gales||High||Consistent gale-force winds likely to even low-levels, peaking around the middle of the day.|
|Severe chill effect||High||Very strong winds will make it feel much colder than temperatures suggest, especially during rain.|
|Persistent and extensive hill fog||Low||Too windy for persistent hill fog, but occasionally falling to the higher summits in rain.|
|Thunderstorms||Low||A small chance of the odd rumble of thunder from isolated wintry showers during the evening.|
|Heavy persistent rain||Low||Rain heaviest through the middle of the day, especially in the west.|
|Strong Sunlight||No Risk|
|Dawn to 0900||0900 to 1200||1200 to 1500||1500 to dusk|
Heavy rain showers
Winds will be by far the most notable hazard for the day, with walkers well advised to keep to the lower slopes. Winds will steadily increase through the morning, peaking at storm-force at height as a band of heavy rain sweeps through the park southwards. It will be brighter later, but the temperature will drop markedly, meaning that following blustery showers will turn increasingly wintry into the evening.
Moderate or good during the morning, poor in heavy rain. Improving to very good later, but falling sharply in wintry showers.
Periods around the higher summits possible, perhaps lower in the heaviest rain although kept up by the wind.
Perhaps peaking westerly 70-75mph midday, easing northwesterly 40mph by midnight.
|Valleys||Plus 7 becoming minus 2 Celsius|
|600 m||Plus 3 becoming minus 2 Celsius|
|Freezing level||Falling from near 700m at first, to 300m by evening.|
There is a chance of successive pre-dawn showers affecting the same exposed parts of the northwest of the park to give some snow accumulations locally. Otherwise rather cloudy and cold, with a widespread overnight frost as the wind eases markedly from Thursday. Remaining largely cloudy by day, but with some sunny spells in the east. Later in the day and into the evening cloud thickening with light snow developing before starting to turn to rain towards midnight.
Very good, moderate or poor during the evening.
Broken above 500m forming during the evening.
Northwesterly 35mph in pre-dawn showers, easing.
|Valleys||Minus 2 becoming plus 5 Celsius|
|600 m||Minus 2 becoming plus 5 Celsius|
|Freezing level||Starting around 300m, rising clear of the summits later.|
Mainly dry but rather cloudy, with the best breaks developing in the east given the moderate westerly wind. A cold start but becoming less cold through the day.
A similar day to Saturday, with large amounts of cloud perhaps thick enough at times to produce the odd spot of light rain or drizzle. Continuing moderate westerly winds.
Probably milder still, with winds becoming southwesterly. It is likely to be rather cloudy, with a few further spots of rain possible and hill fog to low levels on windward slopes.
Altitude 511 metres
Rainfall measured at 03:00 Thursday, 05 December 2013
Rainfall data provided by the Environment Agency. The Met Office is not responsible for content provided by third parties and may remove this data without warning.
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