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Volcanic Ash – 1500 UTC annotated satellite image Issued 1500 UTC on Tue 22 Sep 2015 EXERCISE MEDIUM CONFIDENCE PIREP of VA at FL200, but unable to verify from satellite imagery due to cloud obscuration HIGH CONFIDENCE- VA partially visible on satellite imagery in these two areas with IMO doppler

Volcanic Ash – 2145UTC annotated satellite image Issued 2130 UTC on Thu 07 Aug 2014 TEST TEST TEST TEST TEST TEST LOW CONFIDENCE- PIREP report of VA at FL180. to north of Bardabunga but cloud obscuring area on imagery HIGH CONFIDENCE- IMO radar discerning VA in layers to FL460 to southwest

High pressure is dominant over the UK over the weekend, bringing a good deal of dry and fine weather, albeit with varying amounts of cloud.   Monday’s Bank Holiday for Northern Ireland, England and Wales will see a continuation of the settled weather, with potentially some long periods of sunshine

of Convective Snow (kg/m**2/s) Surface Low-Level Cloud Amount (%) Surface Medium-Level Cloud Amount (%) Surface High-Level Cloud Amount (%) Surface Fog Fraction (%) Surface Mean Sea Level Pressure (hPa) Surface Temperature at 1.5m (DegK) Surface 10m Wind-U (m/s) Surface 10m Wind-V(m/s) 850 hPa Temperature (DegK

will start markedly different from the end of the working week, with widespread cloud cover and outbreaks of rain, particularly affecting western areas. Rain will be persistent across western Scotland, especially over the hills, following an already wet Friday. With schools breaking up and holiday

WAFS 10 YEAR PLAN PHASE 1 PHASE 2 In Nov 2020: NEW 0.25° Icing, Turbulence and CB gridded data NEW Improved Icing and Turbulence algorithms NEW OPMET data in IWXXM format Retired: In-cloud turbulence gridded data In Nov 2022: All SIGWX will cover the range FL100-FL600 Some SIGWX elements included

14.5 °C, with fog in some central and southern counties, the 11th was mainly dry with just patchy light rain for the north, and it brightened up across the south-east during the afternoon. The 12th was rather cloudy, but the cloud tended to thin and break from most parts away from western coastal

  The representation of fog, cloud and rain processes in regional modelling is of fundamental importance for both NWP and climate, particularly at “convective” resolving scales. This session will include talks and discussion covering; fog and visibility,  microphysics (both cloud and aerosol), aerosol-cloud

CONFIDENCE- Pilot report of ash at FL380 here at 13/1430Z. Not supported model output and not discernible on satellite imagery due to frontal (meteorological) cloud. Seems unlikely at that height also. LOW CONFIDENCE- Low confidence in ash in this ellipse due to obscuration by meteorological cloud. Ash suggested by model output only in this region. © Crown copyright Met Office