ASTRONOMY WEATHER FORECAST
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London

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

Issued by Weather Consultancy Services on:
Saturday 16 October 2021 03:00 hrs
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UK & Ireland Weather Summary for Saturday
High pressure slides southeastwards and moves over Europe. A mainly dry day but rather cloudy as a south-westerly flow moves back in for many. Becoming breezier in the west as Atlantic low pressure starts to push a front in across Ireland and Northern Ireland later.


Forecast for astronomy in London for the next 5-days
Data based on GFS model updated: Sat 16 October 2021 03:00
Time SFC Wind Rain * Total cloud Low cloud Med cloud High cloud Temp Sfc RH Pressure Seeing Clarity
6am SaturdayS 1g9mph0mm100%100%0%0%11C65%1021mb10
9am SaturdayS 2g11mph0mm100%100%0%0%12C72%1021mb40
Midday SaturdayS 3g13mph0.1mm87.5%82.3%0%0%13C74%1020mb31
3pm SaturdaySW 3g11mph0mm100%100%78.2%78.2%15C68%1019mb40
6pm SaturdaySW 3g17mph0.1mm94.1%94.1%0%0%14C78%1019mb21
9pm SaturdayS 2g16mph0.1mm100%0%5%5%12C89%1019mb10
00:01am SundayS 3g16mph0.1mm100%0%40.6%40.6%12C89%1018mb20
6am SundayS 3g18mph0mm100%0%100%100%12C90%1017mb20
Midday SundayS 4g18mph0mm100%0%99.4%99.4%16C67%1017mb30
6pm SundayS 2g17mph0mm5%5%5%5%14C76%1017mb15
00:01am MondayS 3g10mph0mm54.3%0%0%0%12C84%1017mb33
Midday MondayS 6g24mph0mm100%37.5%73.8%73.8%18C70%1016mb30
00:01am TuesdayS 4g21mph0mm100%100%100%100%16C93%1014mb20
Midday TuesdaySW 6g32mph0.6mm100%100%46.3%46.3%18C84%1010mb10
00:00am WednesdaySW 5g38mph3.9mm100%100%100%100%16C90%1003mb00
Midday WednesdayW 12g36mph4mm100%5%100%100%14C66%999mb40
00:00am ThursdaySW 5g30mph2.3mm1.3%0.7%1.3%1.3%9C77%1001mb05
Midday ThursdayW 15g30mph0.3mm71.7%71.7%5%5%12C68%1001mb42
[* 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, Friday 15 October 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.