MOUNTAIN WEATHER INFORMATION SERVICE www.mwis.org.uk Yorkshire Dales and North Pennines The entire Yorkshire Dales National Park and North Pennines AONB, including the Three Peaks and Cross Fell, also south to Forest of Bowland and Ilkley Moor. Graham Uney Mountaineering - Mountain Leader, Lowland Leader, Hill & Mountain Skills, Navigation www.grahamuneymountaineering.co.uk General Summary for Thursday, 26 December, 2019 British Mountain Summary: Based on forecast chart for noon 26 December, 2019 A front pushes slowly northeastwards across Britain, bringing a zone of upland snow, rain lower slopes and extensive very low cloud, but only small amounts much of Highlands. Milder in Wales, bursts of rain up to higher tops. Winds varied, in places sudden gale force gusts. Headline for Yorkshire Dales and North Pennines Snow becoming all rain moving in. Winds up to gale force. Detailed Forecast for Thursday, 26 December, 2019 How windy? (On the Southeasterly, speeds varied, often in range 25 to 40mph, locally less for periods; summits) strongest on or just north of major summits. Effect of wind on Varied, but walking impeded on most higher terrain. In places very gusty to you? some lower slopes. Significant wind chill locally. How wet? Upland snow and rain moving in (Precipitation and its A general zone of rain and upland snow will extend slowly across the region from the impact) southwest through the day, becoming gradually more widespread and persistent in western Yorks Dales morning into middle of day, increasingly rain to higher slopes. Small amounts reaching North Pennines. Cloud on the hills? Covering Pennines much of day During snow/rain, cloud will shroud the fells from lower slopes upward. Some northern areas may start with just patchy low cloud. Chance of cloud 10% free summits? Sunshine? No sunshine. Air clarity (below Hazy at best and widely poor visibility in rain - or appalling in snow. cloud) How Cold? (at 700m) 0C rising slowly to 2C. In strongest wind, feeling like -10C. And in the valleys Near or just above freezing point at dawn; rising slowly through the day, reaching 5C toward and beyond dusk. Visit us at www.mwis.org.uk Page 1 of 2 Live YD 2019-12-26 2019-12-28 MOUNTAIN WEATHER INFORMATION SERVICE www.mwis.org.uk Yorkshire Dales and North Pennines - Looking Ahead Friday 27 December Saturday 28 December How windy? (On the Southerly or variable, 20 to 30mph; South to southwesterly, 40 to 50mph, risk at summits) perhaps a lull. times 60mph N Pennines. Effect of wind on Sometimes small, but expect blustery Marked increase of speed with height; you? conditions on the hills at least part of difficult conditions on higher terrain. day. Sudden powerful gusts lower slopes. How wet? Rain or drizzle Little or no rain (Precipitation and its Areas of rain may well linger through Probably very little rain in total, but pockets impact) much of the day, at times drizzly. of drizzle may affect western areas from time to time. Cloud on the hills? Fairly extensive to low levels Most persistent west Risk cloud covering fells from low levels Banks of low cloud across the hills, upward, with banks of fog in or just above focused on western Yorks Dales, where some valleys. Some slopes may lie may persist from lower slopes up through between cloud layers. the day. Chance of cloud 20% 40% free summits? Sunshine? Overcast and dull. Local glimpses of sun, most frequent Air clarity (below eastern Dales. cloud) Risk widely murky from lower slopes upward; locally may improve at times. A general haze; locally good visibility eastern areas. How Cold? (at Around 5C; small variation of temperature Around 5C, locally a degree or so higher; 700m) with height. small change of temperature with height. And in the valleys 7 to 9C. 7 to 10C. Planning Outlook All mountain areas of Britain from Friday, 27 December, 2019 A mild south to southwesterly flow will dominate into the weekend. Temperatures above freezing up to highest summits with considerable snow loss. Some prolonged heavy rain focused on western mountains in Scotland, may result in flooding in places. Small amounts of rain for eastern Scotland and England & Wales, but low cloud will often cover western hills in particular. Lengthy periods of upland gales or severe gales. Staying unsettled toward New Year, but temperatures are likely to fluctuate, with freeze and thaw cycles on the mountains. Forecast issued at 7:54 on Thursday, 26 December, 2019 Forecasts are issued daily by 16:30 and are kept under review and amended as necessary. However, expected conditions can still change after issue. © Copyright Geoff Monk & Associates, 2019. Visit us at www.mwis.org.uk Page 2 of 2 Live YD 2019-12-26 2019-12-28.