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chance of disruptive snow lies in Wales, the Midlands, and northern England, with accumulations of 10 to 20cm possible in the most exposed spots. Further south, rain will dominate, but as the storm moves away and northerly winds return, even the southwest could see a brief spell of snow. London

: ≥ 99.2 percent of complete data. June 2025 July 2025 August 2025 September 2025 late GRIB2 98.3% 99.4% 100% 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

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

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 on SADIS by 05:00 over the last

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

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

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

if we inadvertently find ourselves in cloud? When did we last practise with London Centre / D&D on VHF 121.5MHz? • Ensure careful monitoring of fuel, distance, speed and elapsed time when dealing with delays from encountered weather. • During take-off for this flight, be ready to deal with gusts

: ≥ 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

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