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• WAF_NEW

  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

• volcanicash-nephanalysis-1526638705issue.pdf

  Volcanic Ash – T+0 annotated satellite image Issued 1015 UTC on Fri 18 May 2018 LOW CONFIDENCE- Areas of cloud may soon obscure forward edge of plume HIGH CONFIDENCE- Large gaps in cloud means VA is clearly visible in satellite imagery © Crown copyright Met Office

• Tropical cyclone facts

  mechanisms required to transform these cloud clusters into a tropical cyclone. These trigger mechanisms depend on several conditions being 'right' at the same time. The most influential factors are: a source of warm, moist air derived from tropical oceans with sea surface temperatures normally in the region

• Thundery showers in the south, before a return to warm, dry weather for all

  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

• sigwx-interpretation-guide-v2.01.pdf

  .......................................................................................................... 10 3.7. Cumulonimbus Cloud .......................................................................................... 11 3.8. Icing ..................................................................................................................... 12 3.9. Flight level

• sigwx-interpretation-guide-v201pdf

  .......................................................................................................... 10 3.7. Cumulonimbus Cloud .......................................................................................... 11 3.8. Icing ..................................................................................................................... 12 3.9. Flight level

• volcanicash-nephanalysis-1591956170issue.pdf

  EXERCISE EXERCISE EXERCISE VOLCICE Volcanic Ash T+0 annotated satellite image Issued 1000 UTC on Fri 12 Jun 2020 LOW CONFIDENCE ✂ Meteorological cloud is inhibiting view of ash in satellite imagery HIGH CONFIDENCE ✁ IMO ground-based radar detected ash cloud to height of 18km © Crown copyright Met Office

• volcanicash-nephanalysis-1539965006issue.pdf

  Volcanic Ash – T+0 annotated satellite image Issued 1550 UTC on Fri 19 Oct 2018 VOLCICE EXERCISE LOW CONFIDENCE- Meterological cloud in vicinity of Kverkfjoll partially obscuring view of ash cloud. LOW CONFIDENCE- PIREP reported VA at FL180 at 19/1530 UTC. Ash not discernible on imagery. VOLCICE EXERCISE © Crown copyright Met Office

• volcanicash-nephanalysis-1450184471issue.pdf

  Volcice Exercise – 1230 UTC annotated satellite image Issued 1230 UTC on Tue 15 Dec 2015 EXERCISE LOW CONFIDENCE- VA plume observed by C-band radar in Keflavik rising to 7km, but cloud covering the volcano LOW CONFIDENCE- Cloud to the north of the volcano is masking any ash emitted EXERCISE EXERCISE © Crown copyright Met Office

• global-nwp-asdi-datasheet.pdf

  rainfall_rate_from_ convection_max- PT01H rainfall_rate_from_ convection_max- PT03H rainfall_rate_from_ convection_max- PT06H rainfall_ accumulation-PT01H Fraction of horizontal grid square occupied by cloud as diagnosed by the model cloud scheme. This is for the whole atmosphere column as seen from