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in the 1961-1990 averaging period only London and Hampshire recorded six or more days over 28°C, by the latest decade (2014-2023) this has spread across much of England and Wales, with frequencies in the south east increasing to over 12 days each year in many counties. The expansion of the area
PWSCG (34) Meeting 10:30 – 16:00 Wednesday 15 th July 2015 Conference Centre, BIS, 1 Victoria Street, London In Attendence: Wyn Williams (WW) Denise Harker (DH) Mike Gray (MG) Paul Riches (PR) Katrina Lidbetter (KL) Alessia Morris (AM) Colin Hord (CH) Martin Jones (MJ) George Tabeart (GT) Liz
January 2025 February 2025 March 2025 late GRIB2 99.2 100 100 97.6 GRIB2 CB/Icing/Turbulence Objective: Ensuring flight planning systems have timely and reliable forecasts of ’blended * ’ en-route aviation hazard data. ( * combined WAFC London & Washington hazard data ) The table below shows
GRIB2 100% 98.4% 98.3% 99.4% GRIB2 CB/Icing/Turbulence Objective: Ensuring flight planning systems have timely and reliable forecasts of ’blended * ’ en-route aviation hazard data. ( * combined WAFC London & Washington hazard data ) The table below shows the percentage of complete datasets available
ahead. Winds from the southwest will keep temperatures on the mild side, with little sign of any significant cold spells. Ensemble forecasts for London suggest average temperatures of 10–11°C, with only brief dips into colder territory. Even in Edinburgh, the pattern is similar, with only short-lived
: ≥ 99.2 percent of complete data. July 2025 August 2025 September 2025 October 2025 late GRIB2 99.4% 100% 100% 99.2% GRIB2 CB/Icing/Turbulence Objective: Ensuring flight planning systems have timely and reliable forecasts of ’blended * ’ en-route aviation hazard data. ( * combined WAFC London
2025 April 2025 May 2025 late GRIB2 100% 97.6% 100% 98.4% GRIB2 CB/Icing/Turbulence Objective: Ensuring flight planning systems have timely and reliable forecasts of ’blended * ’ en-route aviation hazard data. ( * combined WAFC London & Washington hazard data ) The table below shows the percentage
August 2025 late GRIB2 98.4% 98.3% 99.4% 100% GRIB2 CB/Icing/Turbulence Objective: Ensuring flight planning systems have timely and reliable forecasts of ’blended * ’ en-route aviation hazard data. ( * combined WAFC London & Washington hazard data ) The table below shows the percentage of complete
. This is well above the threshold for a heatwave, which is 28°C in London and lower elsewhere. Several station records in Scotland and Northern Ireland were broken, with some dating back more than 50 years. The highest temperature recorded during the heatwave was 35.8°C in Faversham on 1 July
late GRIB2 97.6% 100% 98.4% 98.3% GRIB2 CB/Icing/Turbulence Objective: Ensuring flight planning systems have timely and reliable forecasts of ’blended * ’ en-route aviation hazard data. ( * combined WAFC London & Washington hazard data ) The table below shows the percentage of complete datasets
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