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in question to 0900UTC the following day. Mon Tue Wed Thu Fri Sat Sun Monthly atmospheric circulation Mean sea level pressure These charts show the monthly mean sea level pressure for June 2023 for the UK and north Atlantic, based on the ERA5 reanalysis (Hersbach et al, 2019), both as actual values

atmospheric circulation Mean sea level pressure These charts show the monthly mean sea level pressure for July 2024 for the UK and north Atlantic, based on the ERA5 reanalysis (Hersbach et al, 2019), both as actual values and as an anomaly relative to the July long term average. These charts provide

in temperature and humidity. Air masses are separated by transition zones or boundaries that may be more sharply defined - these are called fronts. Air masses and weather fronts (Factsheet 10) 11. Interpreting weather charts On a weather chart, lines joining places with equal sea-level pressures are called

day. Mon Tue Wed Thu Fri Sat Sun Monthly atmospheric circulation Mean sea level pressure These charts show the monthly mean sea level pressure for March 2024 for the UK and north Atlantic, based on the ERA5 reanalysis (Hersbach et al, 2019), both as actual values and as an anomaly relative

These charts show the monthly mean sea level pressure for November 2023 for the UK and north Atlantic, based on the ERA5 reanalysis (Hersbach et al, 2019), both as actual values and as an anomaly relative to the November long term average. These charts provide an indication of the weather characteristics

on the day in question to 0900UTC the following day. Mon Tue Wed Thu Fri Sat Sun Monthly atmospheric circulation Mean sea level pressure These charts show the monthly mean sea level pressure for May 2023 for the UK and north Atlantic, based on the ERA5 reanalysis (Hersbach et al, 2019), both as actual

level pressure These charts show the monthly mean sea level pressure for December 2023 for the UK and north Atlantic, based on the ERA5 reanalysis (Hersbach et al, 2019), both as actual values and as an anomaly relative to the December long term average. These charts provide an indication

as daily totals. The daily rainfall is the total from 0900UTC on the day in question to 0900UTC the following day. Mon Tue Wed Thu Fri Sat Sun Monthly atmospheric circulation Mean sea level pressure These charts show the monthly mean sea level pressure for February 2024 for the UK and north Atlantic

rainfall maps - calendar view These maps show daily rainfall for each day of August 2024 as daily totals. The daily rainfall is the total from 0900UTC on the day in question to 0900UTC the following day. Mon Tue Wed Thu Fri Sat Sun Monthly atmospheric circulation Mean sea level pressure These charts show

These maps show daily rainfall for each day of March 2025 as daily totals. The daily rainfall is the total from 0900UTC on the day in question to 0900UTC the following day. Mon Tue Wed Thu Fri Sat Sun Monthly atmospheric circulation Mean sea level pressure These charts show the monthly mean sea level