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Volcanic Ash – T+3 annotated satellite image Issued 1230 UTC on Fri 14 June 2019 VOLCICE EXERCISE HIGH CONFIDENCE- IMO radar confirms ongoing eruption, although horizontal and vertical extend difficult to assess given cloud cover. X LOW CONFIDENCE- PIREP reported VA at FL180 at 14/1130 UTC but not discernable on imagery due to cloud cover. VOLCICE EXERCISE © Crown copyright Met Office

to support you with discussing tornadoes. What is a tornado? A tornado is a rapidly rotating column of air that reaches between the base of a storm cloud and the Earth’s surface. They form in very unsettled weather conditions as part of severe thunderstorms. Many conditions need to be present

New WAFC SIGWX Verification When developing the new automated WAFS SIGWX forecasts, checks have been made to ensure that the forecast areas of cumulonimbus cloud, icing and turbulence provided within these forecasts have a good level of accuracy and are at least as good as, if not better than

warm for many and muggy in the south.  Tonight, any showers or thunderstorms will ease and it will leave a largely dry night, with some clear spells. Some isolated mist and fog patches will form in places by dawn and some thicker cloud around northeast coasts.  The new week begins with a bang courtesy

Thursday begins on an unsettled note, particularly in the far southeast, where heavy showers and thunderstorms are expected during the morning. These will gradually clear offshore, making way for a more widespread band of cloud and rain moving in from the north and west. As this system progresses

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

Key to weather symbols Key to weather symbols Sunshine and showers Sunny Cloud and rain Sunshine and showers Sunny Cloud and rain Cloudy and snow Cloudy Thunder and lightning

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

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

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