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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

Volcanic Ash – T+0 annotated satellite image Issued 1500 UTC on Tue 05 Aug 2014 TEST TEST TEST TEST TEST TEST MEDIUM CONFIDENCE - Thick cloud obscuring any ash layers BUT – VA was discernable in this location on earlier images HIGH CONFIDENCE- IMO radar discerning VA to FL360 near Katla and VA

1300 UTC Jan 27 2016 annotated satellite image Issued 1350 UTC on Wednesday 27 Jan 2016 LOW CONFIDENCE- Ash may extend further west in Denmark Strait but cloud cover means it cannot be discerned by satellite imagery. EXERCISE HIGH CONFIDENCE- VA clearly discernible in satellite imagery. Verified

to 22°C. These warmer conditions will be driven by the arrival of a warm sector airmass. Thursday night will bring increasing cloud cover, with low cloud and drizzle expected over western hills. More persistent rain will return to northern and northwestern regions, accompanied by strengthening winds

, weather, cloud, temperature and pressure.  METARs are provided in a coded form, so to be able to fully interpret these messages, an understanding of what these codes mean is very useful. Click here for a decode for METARs.  TAF decode  Familiarise yourself with the abbreviations used in TAFs

clouds. Going from a global climate model with dx=100 km to dx=1km would lead to needing 100^3=1,000,000 more compute. If we can get some of the benefit for less than that, that is a massive WIN! So not faster as such, perhaps slower even, but faster than what an increase in resolution would cost! 80

breaks in the cloud may develop in the lee of hills. It will feel notably humid across England and Wales, with temperatures rising higher than on Friday. The southeast is expected to be particularly warm, with maximum temperatures reaching 29 to 30°C. A breezy day for many, especially in the far

breaks in the cloud may develop in the lee of hills. It will feel notably humid across England and Wales, with temperatures rising higher than on Friday. The southeast is expected to be particularly warm, with maximum temperatures reaching 29 to 30°C. A breezy day for many, especially in the far

intervals, with new data published every 6 hours. • The new SIGWX will span FL100 to FL600 NEW WAFS SIGWX FORECASTS – WHAT WILL THEY CONTAIN? • Jet stream information • Tropopause height contours • Areas of occasional (OCNL) and frequent (FRQ) cumulonimbus (CB) and the flight level of the CB cloud tops

to enable map functionality on a mobile phone. We have made the selecting of map layers easier and more intuitive than before. To find the forecast (mesoscale) map layers: open the map layer selector, and select 'FORECAST PRECIPITATION' or 'FORECAST VISIBILITY & CLOUD' and then make your choice