This forecast is updated at 7am, 1pm and 7pm

Issued by Weather Consultancy Services on:
Sunday 17 December 2017 03:00 hrs
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UK & Ireland Weather Summary for Sunday
On Sunday, high pressure lies to the south of Britain, centred around Biscay. A trough of low pressure and fronts move across northern regions, bringing a spell of rain. A cold front passes south-eastwards across Britain into the evening and night, and pressure will then build from the south-west. Generally cloudy throughout the day, and very dull, especially in the west. Some brighter skies toward the south-east. Blustery winds, strongest in the north.

Forecast for astronomy in Machrihanish for the next 5-days
Data based on GFS model updated: Sun 17 December 2017 03:00
Time SFC Wind Rain * Total cloud Low cloud Med cloud High cloud Temp Sfc RH Pressure Seeing Clarity
Midday SundaySW 7g31mph8.9mm100%99%37%37%10C84%1014mb20
3pm SundayW 8g29mph0.1mm100%42%0%0%8C73%1017mb30
6pm SundayW 6g24mph0.1mm100%27%0%0%8C71%1019mb30
9pm SundayNW 4g20mph0mm100%1%0%0%8C74%1022mb20
00:01am MondayNW 4g17mph0mm100%1%0%0%8C74%1024mb30
3am MondayNW 3g14mph0mm85%0%0%0%8C76%1025mb21
6am MondayNW 3g9mph0mm68%0%0%0%8C81%1026mb32
Midday MondayNW 2g13mph0mm68%0%0%0%8C83%1029mb22
6pm MondaySW 1g19mph0mm96%0%0%0%8C82%1028mb00
00:01am TuesdaySW 3g21mph0.1mm94%67%0%0%9C91%1029mb11
6am TuesdaySW 4g21mph1.1mm100%100%0%0%9C96%1028mb10
6pm TuesdaySW 4g32mph0.1mm80%35%18%18%11C92%1026mb01
6am WednesdaySW 5g5mph0.8mm100%100%74%74%9C94%1029mb40
6pm WednesdaySW 5g2mph0mm100%35%31%31%8C91%1030mb40
6am ThursdayW 5g13mph0.1mm100%1%100%100%8C90%1033mb40
6pm ThursdayNW 5g17mph0mm0%1%0%0%7C73%1039mb45
6am FridayNW 2g7mph0mm42%0%0%0%7C80%1042mb43
6pm FridaySW 3g19mph0.6mm68%63%1%1%8C92%1036mb02
[* rainfall is previous 6-hours. Gusts are over open ground.]

Planning outlook:
Tuesday low pressure and a cold front will move south across England and Wales with high pressure north west of Scotland. A colder day as rain and snow spreads south. Mainly dry in the channel with sunny spells. Visibilities will be good in the channel but moderate to poor elsewhere in rain and snow.
Wednesday a cell of high pressure is centered west of Ireland and will be ridging east. A cold, windy day with sunny spells and scattered showers of rain and snow. Visibilities will be good but moderate in rain showers, poor in snow showers.
Thursday sees high pressure centred south of Ireland and this will give much of the country a dry, settled, day with sunny spells. Visibilities will be good.
Friday a cold front spreads rain down across Scotland, the Irish Sea and northern England. Fair and dry in the south and in the channel with varying cloud and sunny spells. Visibilities will be good in the south and in the channel, but falling to moderate or locally poor as the rain sets in across the north.
Saturday high pressure to the west of Britain is ridging into Scotland with a front into the far north west. Most areas will be fair and dry with sunny spells today after some patchy mist clears. Visibilities will be good but moderate at first.
Sunday a front moves south east across Britain. Outbreaks of rain will clear western areas in the afternoon. Visibilities will be moderate improving to good as the front clears.

Synoptic charts based on data from 0001 GMT, Sunday 17 December 2017 (Updated daily by 9am)
Tomorrow (Day 2)

Day after tomorrow (Day 3)

This forecast is for planning purposes only.
Forecast is copyright Weather Consultancy Services.