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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

Areas of expertise Instruments for measuring, wind, temperature, humidity, pressure, visibility, present weather, cloud base, snow depth and rain Methods of Observation and Instrument Exposure Automatic Weather Stations Current activities Mike has directed the project to test and document the key

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

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and increasingly warm weather to southern counties following foggy starts in places, but it was cloudier in the north and especially north-west, with some showery rain for the north-west on the 3rd and 4th, and more widespread cloud and light rain across the north on the 5th. The rain became heavier

was a quieter day with sunshine, starting frosty in the north with -3.5 °C recorded at Spadeadam and Bewcastle (both Cumbria), but the south-east was cloudy at first and cloud increased from the south-west during the day. 6th to 10th The 6th was dry and warm with some sunny intervals for most

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

and thunderstorms over the south-west spread north and east. The night of the 7th/8th was unusually warm with Langdon Bay (Kent) not falling below 22.3 °C. Between the 8th and 11th, it was widely hot and sunny but low cloud proved slow to clear at times in Midland and northern counties, especially

began frosty on the 17th, with fog in places, and some sunshine followed for all but the north-west. The 18th was broadly frosty to begin, with mist and fog covering the bulk of the country, clearing only slowly if at all in some spots; otherwise cloud amounts were variable with long sunny periods

. The weather variables in a microclimate, such as temperature, rainfall, wind or humidity, may be subtly different to the conditions prevailing over the area as a whole and from those that might be reasonably expected under certain types of pressure or cloud cover. Indeed, it is the mixture of many