Barometric Pressure Forecast for Slough, United Kingdom
Barometric pressure forecast for Slough, United Kingdom — on the Thames Valley gravel terraces in Berkshire, west of London. See current barometric pressure and what it means for weather-sensitive people.
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Pressure and weather in Slough
Slough sits on flat gravel terraces in the Thames Valley, twenty miles west of central London and a short distance north of the river itself, with the Chiltern scarp rising to the northwest. It is one of the driest and warmest parts of Britain, sheltered from the Atlantic by the whole width of southern England and close enough to London to pick up the edge of the capital's heat island. The flatness and the proximity of the floodplain give the area two local characteristics. Radiation fog forms readily on calm clear nights under winter high pressure, sitting in the valley for hours after the surrounding higher ground has cleared. And the Thames itself, slow and heavily engineered through this reach, drains poorly in prolonged wet spells, which is why the winter of 2013 to 2014 left large parts of the valley under water for weeks. Barometrically the pattern is the standard British one: Atlantic depressions crossing in sequence from autumn to spring with falls of eighteen to thirty hPa, punctuated by blocking highs that can hold a flat high barometer for ten days at a stretch with fog, frost and stagnant air beneath.
What this means for you
Blocking highs hold the valley under fog and stagnant air for days while the barometer stays flat and high. A migraine tracker app that logs air quality alongside pressure explains more of those spells than pressure does on its own.