ASTRONOMY WEATHER FORECAST
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London

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

Issued by Weather Consultancy Services on:
Friday 22 January 2021 03:00 hrs
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UK & Ireland Weather Summary for Friday
A cold west to northwest flow affects all parts of the UK and Ireland through Friday. A trough will be passing through southwest England as a shallow area of low pressure is west of Ireland.


Forecast for astronomy in London for the next 5-days
Data based on GFS model updated: Fri 22 January 2021 03:00
Time SFC Wind Rain * Total cloud Low cloud Med cloud High cloud Temp Sfc RH Pressure Seeing Clarity
6am FridayW 5g19mph0mm0%0%0%0%4C81%990mb25
9am FridayW 5g16mph0mm85%0%0%0%3C80%992mb31
Midday FridayW 7g13mph0mm93%0%0%0%5C68%993mb41
3pm FridayW 4g12mph0mm23%0%0%0%6C62%993mb45
6pm FridayW 6g12mph0mm29%0%18%18%5C76%993mb44
9pm FridaySW 3g2mph0.1mm53%0%53%53%4C84%993mb43
00:01am SaturdayW 3g7mph0.5mm77%45%77%77%4C85%993mb41
6am SaturdayNW 4g12mph0.1mm83%82%27%27%2C79%993mb41
Midday SaturdayNW 5g7mph0mm100%11%100%100%3C70%994mbN/A0
6pm SaturdayW 4g9mph0mm70%0%68%68%2C80%996mb42
00:01am SundaySW 3g14mph0mm63%45%30%30%1C75%999mb32
Midday SundaySW 4g21mph0mm61%0%61%61%4C55%997mb32
Midday MondayNW 3g15mph0.2mm100%100%0%0%2C93%1003mb20
00:00am TuesdaySW 4g11mph0mm22%0%0%0%-0C75%1013mb45
Midday TuesdayS 3g22mph0mm72%0%56%56%3C68%1014mb02
00:00am WednesdayW 7g28mph3.2mm100%100%48%48%6C96%1010mb20
Midday WednesdayS 5g9mph0mm100%96%84%84%7C90%1012mb30
[* 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, Thursday 21 January 2021 (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.