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Rebecca Murray-Watson and Emilie Fons Clouds in N2560 RAL3p3 simulations are more reflective than other GSRMs and CERES. Profile plot above shows additional ice in RAL3p3 – cloud fraction is largely similar to other GSRMs and UM CoMA9 and GAL9 First looks from WCRP global km-scale hackathon UM CTC 4.4

prescribed sea surface temperatures. It is recommended to base the simulations on the OSTIA sea surface temperature analysis, or a similar product. 8. Cloud droplet number concentrations Aerosol or CCN concentrations are not specified. We suggest, however, to fix the cloud droplet number

interlude, it turned wet almost everywhere by the 10th. Around mid-month there was a spell of warm, humid, showery weather with thunderstorms especially in central, western and southern areas, and persistent low cloud along the northeast coast. There was a hot sunny spell especially over England from

for much of England, especially the south-west, and also south Wales, but elsewhere cloud was more variable. The second half was generally more unsettled with frequent westerly and south-westerly winds, but with an exceptionally hot spell from the 22nd to 26th which saw record-breaking temperatures

of rain 🌧️ pic.twitter.com/KQPqvUGmui — Met Office (@metoffice) September 21, 2025 Monday night will bring clear skies for many, allowing a patchy rural frost to develop, particularly in northern and western areas. Variable cloud and a few coastal showers will persist in the north and east

enhance your safety and enjoyment. For example: Cumulus Clouds: These can develop rapidly on warm days, potentially leading to thunderstorms. Watch for cauliflower-shaped tops or fibrous, anvil-shaped clouds, signs of heavy rain or lightning. Cirrostratus and Altostratus: These high, wispy clouds and hazy

While the northwest will experience some unsettled spells, many areas, particularly in the south and east, can expect fine, dry, and increasingly hot weather as the week progresses. Tuesday begins with a band of cloud and patchy rain or drizzle moving southeast across Scotland and Northern Ireland

. It became less settled from the 9th onwards, and on 13th/14th there were some large rainfall totals in upland areas of western/southern Scotland and north-west England. The middle part of the month saw generally larger cloud amounts, with spells of rain mainly for Scotland, but from around the 21st onwards

energy caused by wind shear) of turbulence which is used to show dynamic stability and the formation of turbulence. 1 [YYYYMMDD]T[hhmm]Z-PT[nnnn]H[mm]M-bulk_ richardson_number.nc 3-hourly (0-144) 6-hourly (150-168) Instantaneous cloud amount below 1000ft ASL Fraction of horizontal grid square occupied

energy caused by wind shear) of turbulence which is used to show dynamic stability and the formation of turbulence. 1 [YYYYMMDD]T[hhmm]Z-PT[nnnn]H[mm]M-bulk_ richardson_number.nc 3-hourly (0-144) 6-hourly (150- 168) Instantaneous cloud amount below 1000ft ASL Fraction of horizontal grid square