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hours at surface level and at standard pressure levels twice a day. The model’s initial state is kept close to the real atmosphere using hybrid 4D-Var data assimilation. Surface Level Parameters Time Steps 1. mean sea level pressure Hourly T+0 to T+36, 3 hourly T+39 to T+144 2. 1.5m temperature Hourly

preserving the benefits of higher resolution. With the new model formulation, denoted HadAM3P, the primary surface variables of temperature, precipitation and surface pressure are simulated better than, or at least as well as, HadCM3 over all major continental regions. Details of these improvements

for the onset of the southwest monsoon begins during the pre-monsoon season from March to May, when rapid solar heating takes place over the land compared to the adjacent oceans, increasing the land-sea temperature gradient. The surface pressure over the land decreases with a trough of low pressure

levels (surface, atmosphere, specific level) - Pressure levels - Height levels - Depth levels API GRIB2 Met Office Weather DataHub Global Media delivery services A range of our data can be delivered through the media delivery services. For example, reviews of the UK weather, forecast guidance

in December 2009 that were either in the Regional Basic Climatological Network (RBCN) or in the Global Climate Observing System (GCOS) Surface Network). Following the ruling of the Information Commissioner we have decided to release all station data, except those stations in Poland which we do not currently

Climate centres use several standard regional averages of sea surface temperature anomalies as indices to monitor the state of the tropical oceans.

Another area of low pressure is following closely on the heels of Storm Kathleen which brought challenging conditions to parts of the UK over the weekend.

Another area of low pressure is following closely on the heels of Storm Kathleen which brought challenging conditions to parts of the UK over the weekend. The low-pressure system will bring the strongest winds to Cornwall and coastal parts of Devon and Somerset later today [Monday 8 April

strong winds, windstorms, or perhaps a compound hazard (e.g. wind-driven rain). Figure 2 Storm track density in ERA5 for winters (Dec-Jan-Feb) 1979-2014. The storm events are tracked in the vorticity about 1km above the ground (on the 850hPa pressure surface), filtered for events that last

-present, according to the NCEP reanalysis (Kalnay et al., 1996).   Figure 5. Near-surface meteorological conditions for November 2020 – March 2021 relative to the 1981-2010 long-term average: (a) mean sea level pressure anomaly (hPa); (b) surface air temperature anomaly (°C). Data are from the NCEP

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