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• ukcp18-factsheet-local-2.2km.pdf

  but not evaluated against observations Available but not evaluated against observations Lightning Not available Further evaluation required before use Snow Use with caution Use with caution Less sophisticated treatment of lying snow than RCM Soil moisture Use with caution Use with caution Use

• Unsettled start to September

  would lead to more settled conditions and sunny spells, and there are other outcomes that lie between the two illustrated here. This complex jet stream interaction which drives these potential different directions the UK weather could take, will mostly conclude by late Tuesday, which will lead to us

• Met Office daily weather: Unsettled with rain, warmth and some sunshine

  a band of cloud and rain lying south-west to north-east across the country, with the most persistent rain for hills in north-west England and north-west Wales. South-east of this band, conditions are generally fine, warm or very warm, with variable cloud and sunny spells. Mainland Scotland will see

• Reliability and sharpness diagrams

  was observed to occur for this sub-group of forecasts is then plotted against the vertical axis. For perfect reliability the forecast probability and the frequency of occurrence should be equal, and the plotted points should lie on the diagonal (solid line in the figure). Thus, for example, when

• Supporting the military since World War I

  ) took place in a low lying area on the Western Front from 31 July to 10 November 1917. The end of July to the end of August was one of the wettest periods of weather for 75 years. August was an exceptionally wet month; in Ypres 127mm of rain, around 60mm more than average, fell during the 31 days

• Met Office weather: Bright start to the week for most with temperatures on the rise

  warm, although coastal areas may feel slightly cooler due to developing sea breezes. Overnight and into Wednesday, some cloud will affect the Northern Isles, but mostly dry and clear elsewhere. The odd fog patch may develop, particularly in low-lying rural areas, where it will turn chilly. However

• Memo

  characteristics. Seven relate to temperature, three to rainfall, plus one each relating to sunshine, thunder and snow lying. In addition, six are averages of daily values, one is a summation and six are counts of ‘days of’. These characteristics determine the statistical properties of the data, which

• postcode-sector-data-parameters-and-locationspdf

  the preceding hour/three/six hours. (9) This is the falling snow amount in mm of liquid equivalent. Doesn’t reflect snow lying on the ground. Falling snow may not settle at all and may be accompanied by rain, i.e. is sleet. (10) This is the lying snow amount in mm of liquid equivalent, approximates to snow

• What is the jet stream and how does it affect our weather?

  winds and clearer skies. READ MORE: Weather trends: blocking highs and the amplified jet stream What Causes the Jet Stream? The jet stream exists due to temperature differences between the equator and the poles. In the northern hemisphere, cold polar air lies to the north of the jet stream, while

• postcode-sector-data-parameters-and-locations.pdf

  the preceding hour/three/six hours. (9) This is the falling snow amount in mm of liquid equivalent. Doesn’t reflect snow lying on the ground. Falling snow may not settle at all and may be accompanied by rain, i.e. is sleet. (10) This is the lying snow amount in mm of liquid equivalent, approximates to snow