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Wednesday 8 October 1952 (Harrow and Wealdstone Train Crash) Weather chart for 1200 UTC on 8 October 1952 General summary For many the morning dawned rather grey but any fog quickly cleared with bright or sunny spells developing, the best of which were across southern and south-western districts

of the event. Figure 1: A probability chart produced 18 hours ahead, showing a high probability of the six-hour rainfall exceeding 20 mm in northern England Case study 2 Another example of a high-impact forecast, where forecasters were helped by the use of ensembles, was for new year celebrations

WAFS IWXXM SIGWX DATA INFORMATION The IWXXM SIGWX Objects have been created from the WAFS gridded data sets, and various functions are applied to it to contour, simplify and smooth the data to form the different SIGWX features. The lower boundary of the new SIGWX chart is FL100, whilst the upper

Monday 2 June 1975 (Widespread June snowfall) Weather chart for 1200 UTC on 2 June 1975 General summary A band of rain, with some sleet or snow in places, across the Midlands quickly pushed south to lie across southern counties of England by midday. The afternoon saw this cloud and rain, with some

which commenced in 1659, it was the warmest calendar month yet recorded. The numerous warm, sunny days were associated with anomalously high pressure over northern Europe and a persistent southerly airstream over the UK. Warmest calendar month yet recorded Impacts The heat placed strains on water

to the wet weather elsewhere, the far north-west of Scotland saw well below-average rainfall from March to October 2012. The persistent wet weather was due to a shi in the jet stream to a much more southerly track than normal, bringing a succession of Atlantic low pressure systems and associated fronts

and records to visualise climate change in the UK. Maps, charts and Data Data tables of UK and regional monthly series  Data tables of monthly station series  UK maps of monthly data Temperature, rainfall and sunshine time series charts Temperature, rainfall and sunshine anomaly charts Multi-century climate series Central England Temperature (series begins in 1659). UK Regional Precipitation (series begins in 1766).

it caused further weather impacts to southern Norway and Sweden, and northern Denmark. Weather data The analysis chart at 0600UTC 17 February 2023 shows the centre of storm Otto over the Northern Isles driving very strong north-westerly winds across Scotland and north-east England. The rain-radar image

about our WAFC London performance indicators  What Does a WAFC Provide?  SIGWX Forecasts: SIGWX charts are essential for pilots, providing a broad overview of significant weather relevant to their flight. Elements visible in these charts include jet streams (wind speeds exceeding 80 knots), areas

will retire the existing medium-level SIGWX charts (4 areas), which only cover part of the globe, in late 2024. Format The WAFCs currently provide WAFS SIGWX forecasts for the graphical elements as objects in BUFR code and PNG formats. Next generation WAFS SIGWX will provide these objects in IWXXM format