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Saturday, 21 November 2009: dawn to dusk
Early mist and low cloud clearing for a time, but with intermittent rain in the morning become persistent and at times heavy during the afternoon. Becoming very windy.
| Hazards | Risk | Explanation |
|---|---|---|
| Blizzards | No Risk | |
| Heavy snow | No Risk | |
| Storm force winds | Medium | Southerly winds increasing steadily. Gusts above 70mph developing on exposed peaks and ridges. |
| Gales | High | Southerly gales developing at all except lowest levels during the day. |
| Severe chill effect | Medium | In combination with rain and gales in afternoon. |
| Persistent and extensive hill fog | High | At first above 100-200m mostly clearing in the morning, then developing again above 300m in rain. |
| Thunderstorms | No Risk | |
| Heavy persistent rain | High | Setting in during the afternoon especially at higher levels in the south of the area. |
| Dawn to 0900 | 0900 to 1200 | 1200 to 1500 | 1500 to dusk |
![]() Mist |
![]() Light rain |
![]() Heavy Rain |
![]() Heavy Rain |
| 0% | 30% | 70-90% | 70-90% |
Intermittent light rain in the morning becoming persistent and at times heavy in the afternoon. Misty with low cloud at first, this clearing, but then with extensive and lowering cloud in rain in afternoon.
Moderate to very poor at first becoming moderate or good for a time away from hill fog, then decreasing moderate or poor again in rain.
Areas above about 100-200m at first mostly clearing, but then becoming extensive again during the afternoon initially above 600m but down to 200-300m by dusk.
Southerly winds increasing steadily, becoming 45-55mph gusts 60-75mph over exposed peaks and ridges by dusk.
| Valleys | Plus 5-7 rising 11-13 Celsius. |
| 700 m | Plus 7-9 Celsius. |
| Freezing level | above summits. |
Sunny intervals, heavy squally showers merging to give some longer spells of rain at times. Risk of thunder. Considerable buffeting with risk of losing ones footing.
Moderate or good away from showers or hill fog.
Occasional above 500m but risk of persistent above 300m in any longer spells of rain.
Southwest 45-55 gusts 60-80mph over exposed peaks and ridges especially in or near any showers.
| Valleys | Plus 9-11 Celsius. |
| 700 m | Plus 5-7 Celsius. |
| Freezing level | above summits. |
West to southwest winds with gusts to 70mph likely at highest levels at first but with winds slowly easing down through the day. Some bright or sunny spells but further showers, some heavy, risk of thunder, but also a risk of some longer spells of rain. Hill fog mostly above 500m but down to 300m in any longer spells of rain.
Strong to gale force southwest wind. Rain at times. Mostly cloudy. Persistent fog generally above 400m but down to 200m in any prolonged rain or drizzle.
Sunny spells and scattered showers, some heavy, risk of thunder and hail. Cloud bases generally above 600m except in showers. Lowering freezing level, close to highest peaks. Southwest gales or severe gales except at lowest levels.
Orkney & Shetland
Highlands & Eilean Siar
Grampian
Strathclyde
Central, Tayside & Fife
SW Scotland, Lothian Borders
Northern Ireland
Wales
North West England
North East England
Yorkshire & Humber
West Midlands
East Midlands
East of England
South West England
London & South East England
Avalanche Information for Scotland
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