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Snowdonia National Park
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Viewing forecast for Thursday, 23rd May, 2013
Forecast last reviewed on Wednesday, 22/05/13 at 15:57
Summary for all mountain areas
Upland gales and unseasonably cold temperatures across the mountains causing severe wind chill. Some bursts of sunshine but scattered showers will bring hail and snow down to even low levels.
Headline, Snowdonia National Park
Upland gales. Bitterly cold. Hail and snow showers.
Northerly 30 to perhaps 40mph with gusts to near 50mph over higher tops.
Effect Of Wind?
Considerable amounts of buffeting at times even down to lower exposed slopes. Severe wind chill for late May.
A few snow showers.
Scattered afternoon showers, generally brief and light of snow above 500m. However small chance of the odd heavy shower in the morning giving a blizzard.
Cloud on the hills?
Clearing most summits
Some patches of cloud down to 800m at first but mostly well broken above summits by afternoon. However, in the Snowdon range, cloud may frequently cover summits above 850m most or all day
Chance of cloud free Summits?
20% higher tops Snowdon range to 90% elsewhere
Sunshine and air clarity?
Periods of bright sunshine, mainly morning. Mostly excellent visibility.
How Cold? (at 900m)
Between -1C and 2C. But may feel as cold as -16C.
900m rising to around Snowdon summit.
Planning Outlook for all mountain areas from Friday, 24th May, 2013
Remaining cold most the coming week - although the coldest conditions will be tomorrow and Friday. There will be freeze thaw cycles on higher Scottish summits, and on higher tops further south, temperatures often only a couple of degrees above freezing point. Total precipitation will be small, but there will be snow showers (often rain or hail on summits from S Scotland southwards), and into next week, occasionally fronts will bring several hours of rain and low cloud. Overall summits will often be cloud free, and the visibility excellent.