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• John_Marsham_ppt.pptx

  @ <1000km scale smoothed out. 39 daily initialisations, each run 48hrs 3 x 39 x 2 = 234 CP model days 1.5km grid, explicit convection (RAL3.2) JULES land, SM from 10 year CP run Sensitivty experiments - spectra b.w.maybee@leeds.ac.uk Plot ratio of mean percentage of total spectral power at given length

• Global humidity reached record levels in 2024, says latest climate report

  – the amount of water vapour in a parcel of air - reached record levels over both land and ocean last year. Relative humidity – a measure of the saturation of a parcel of air – also reached higher levels than in 2023. Total column water vapour – the total amount of water within the atmosphere above the surface

• Met Office daily weather: Weather warnings issued as Storm Claudia set to impact parts of the UK

  heavy rain and strong winds. “It's worth noting that the winds coming in more from the east. And that's pivotal to where we're going to see those highest rainfall totals building up. It's going to be around some eastern facing higher ground, particularly across parts of Wales, southeast Wales

• Northern Ireland sees wettest January in 149 years as 2026 gets off to a wet and windy start

  frequent spells of rain and wind. With little opportunity for drier conditions in between, the ground has become saturated, so even moderate rainfall has had a greater impact. This succession of Atlantic systems is the main reason rainfall totals this month are well above average for many areas.”  Overall

• Extreme weather reveals changing climate

  . Overall, the longest dry spells have decreased by 2.5 days, on average. Rainfall from extremely wet days: Total annual precipitation from falling on the wettest days, averaged over climatological reference periods. UK: 1961-1990 average 64.0 mm; 2008-2017 average 75.0 mm. Total rainfall from extremely wet days has increased by about 17%.

• Met Office daily weather: Unsettled with rain and cooler conditions for many

  to the day across Northern Ireland. Wet and blustery. Heavy rainfall totals building up as we go through the day. And heavy rain also pushing into parts of western, southwestern Scotland in particular. Now, we do have a couple of warnings out. Rainfall totals especially across southwest Scotland

• Relative operating characteristic (ROC)

  with a range of 'trigger' thresholds (triangles) are plotted. The vertical axis gives the hit rate, defined as the number of times the event was forecast (with probability above a certain threshold) and later observed to occur. The hit rate is expressed as a ratio of the total number of occasions on which

• Wet and windy weather for some

  to be downgraded to an ex-tropical system by Tuesday evening as it continues east over the cool waters of the North Atlantic. However, the remnants of the system plays a background role in some of the rainfall totals we may see on Wednesday and Thursday.  Jason Kelly explained: “While Ernesto itself will have

• November 2024: a month of two halves

  the biggest story. Gloucestershire for example, has had its wettest Autumn since the series began in 1836. A wet Autumn for England Rainfall totals for the UK this Autumn have fallen slightly below average, with 301.5mm falling across the period, 10% less than the long-term meteorological average

• Microsoft Word - 2023_09_storm_ciaran_2.docx

  . This was particularly unwelcome following the wet October when large areas of central and eastern England, eastern Scotland, the east of Northern Ireland parts of the South Coast recorded well over twice the monthly average rainfall. The charts below show daily rainfall totals for the first three days