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when an area of high pressure remains nearly stationary and distorts the usual eastward progression of pressure systems. This can lead to prolonged periods of dry and settled weather in the area under the high pressure, while areas on the periphery may experience wet and windy conditions. Blocking

predictably with temperature. This resistance is recorded using high-precision equipment located near the screen. READ MORE: What are wet bulb temperatures and what they are used for? Measuring ground/grass minimum temperature Ground minimum temperature refers to the lowest overnight temperature

is not sufficient to assess model projections. Direct investigation of the mechanisms for future precipitation change is also important, and existing efforts in this area have generated valuable hypothesis about the potential drivers of wet and dry responses [e.g., Biasutti et al., 2008, 2009; Monerie et al

of the wet season in semiarid tropical climates of western Africa. Int J Climatol 21:1251– 1262 Sijikumar S, Roucou P, Fontaine B (2006) Monsoon onset over Sudan- Sahel: simulation by the regional scale model MM5. Geophys Res Lett 33: L03814. doi:10.1029/2005GL024819 Sivakumar MVK (1988) Predicting

. There was plenty of settled weather, with only limited amounts of rainfall, especially in the south. Only during the last week of the month was the weather truly unsettled, a period which included the first named storm of the season. The mean temperature was provisionally 0.5 °C above the 1981-2010 long-term

in these seasons. In summer, convection caused by solar surface heating sometimes forms shower clouds and a large proportion of rain falls from showers and thunderstorms then. The additional heat from the London urban area can encourage such shower development in summer. A further factor that greatly affects

provisionally recorded its sixth wettest July on record, with a succession of low pressure systems bringing unseasonably wet and windy conditions. While August has started fairly unsettled for many, Thursday (10 August) provided a brief glimpse of warmer weather for many. The 28.4°C recorded

, but showers will persist across Northern Ireland and Scotland. These may merge into longer spells of rain, making for a wet and cooler day in these regions, with highs of just 17 to 18°C. READ MORE: When is a hurricane not a hurricane? Further south, England and Wales will see a mix of sunny spells

MORE: How to stay safe and cool in the heat Wednesday brings a noticeable change. A weather system will introduce wetter conditions to the southeast, with outbreaks of rain and drizzle, some of which may turn heavy. There remains a low risk of thunder in the far southeast. Extensive low cloud

to milder, wetter weather starts on Friday night. The persistent northerly winds that have dominated the week will give way to a more westerly or south-westerly flow. This change in wind direction is significant, as it signals the arrival of Atlantic weather systems. As these fronts move in, cloud cover