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Thursday, 18 March 2010: dawn to dusk
Rather cloudy with some patchy light rain at times during the morning, and more persistent rain spreading from the west during the afternoon. Becoming windy.
| Hazards | Risk | Explanation |
|---|---|---|
| Blizzards | No Risk | |
| Heavy snow | No Risk | |
| Storm force winds | No Risk | |
| Gales | High | Gales or severe gales expected over summits and exposed ridges, making walking difficult. |
| Severe chill effect | High | Gales or severe gales at high levels giving a severe wind chill effect. |
| Persistent and extensive hill fog | High | Patchy hill fog at first. Persistent, extensive hill fog developing above 500 metres in afternoon. |
| Thunderstorms | No Risk | |
| Heavy persistent rain | Medium | Rain will become heavy and persistent later in the afternoon. |
| Dawn to 0900 | 0900 to 1200 | 1200 to 1500 | 1500 to dusk |
![]() Dull |
![]() Dull |
![]() Cloudy |
![]() Heavy Rain |
| 30% | 30% | 20% | 70-90% |
A rather cloudy start to the day with patchy hill fog. The cloud may be thick enough to produce some patchy light rain or drizzle during the morning, but it should become dry and brighter for a time around the middle of the day. During the afternoon however, rain will spread from the west, this rain becoming heavy and persistent, giving a wet end to the day. This will be accompanied by an increase in hill fog. A big feature of the day will be the wind, which will be very strong over summits, with gales or severe gales in places, making walking very difficult. This will also give a severe wind chill.
Generally moderate visibility, but poor or very poor in hill fog.
Periods above 800 metres, occasionally 200 metres during the early part of the morning, especially over western and southern fells. During the afternoon, the hill fog will become persistent and extensive above 500 metres, with some periods down to 300 metres.
South to Southwest 35 to 50 mph with gusts as high as 70 mph over exposed ridges by the end of the day.
| Valleys | 6 Celsius rising to 12 Celsius |
| 900 m | Plus 4 Celsius |
| Freezing level | Above the summits. |
A few showers can't be ruled out altogether. However, much of the day will be dry and bright, with some spells of sunshine. The best of the sunshine will be during the morning, as thin high cloud is expected to increase during the afternoon. It will be windy over summits, with a severe wind chill effect.
Very good visibility with clear views of distant hills and ranges.
Occasional hill fog, mainly above 600 metres.
West to Southwest 35 mph with gusts to 50mph, easing later.
| Valleys | 5 Celsius rising to 9 Celsius |
| 900 m | Plus 2 Celsius |
| Freezing level | Above summits. |
A cloudy day with outbreaks of rain, some of which will be heavy at times, accompanied by hill fog, more persistent in eastern fells. Any brighter spells will be limited, with the western fells more likely to see any fair weather.
A mixed day of bright or sunny spells, and scattered showers. Some of these showers may be wintry over highest summits. Windy over summits, with a severe wind chill.
A mixture of bright or sunny spells and scattered showers. Some of these showers will may be heavy, and may be wintry at times over higher summits. It will also be windy over summits and exposed ridges, giving a severe wind chill factor.
FELLTOP CONDITIONS REPORT from Helvellyn at 1200pm on Wednesday 17th March 2010. The snowpack is thawing rapidly at all levels today, but there still remains a significant amount of snow above 700m. The depth and type of snow varies considerably, with a mixture of compacted ice, wet slush and some deeper layers of up to 60cm with a harder surface crust. This can make for slow going above the snowline, with unpredictable conditions underfoot. East facing slopes, including coves and gullies contain a substantially more snow. The exit ramps from Striding and Swirral Edge are extensively covered with deep, granular snow, which is loosely bonded in places. Cornices are still extensive above east-facing slopes and should be given a wide berth particularly in these warmer temperatures. Full winter clothing, footwear and equipment including ice axe and crampons are essential for anyone venturing out onto the fells and going above the snowline. PLEASE NOTE Trekking poles are no subsitute for an ice axe and will be of no use in the event of a slip. The ice covering the upland tarns is currently thawing and is very unstable, so please keep well back from the edges. Summit statistics from Helvellyn at 1200pmTemperature 2.2 cWind chill minus 5.9 cMax wind speed 29.9 mphAverage wind speed 23.4 mph (southwesterly)
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