Environmental Research Group
King's College London
Issued On: 26/05/2017 12:14:00
Start: Saturday 27 May
Finish: end of Sunday 28 May
Pollution Band: Moderate
Some uncertainty exists in the current weather forecast associated with a change over the weekend from hot weather off the continent to cooler weather circulating in from the Atlantic.
Warm air coming in off the continent and mainly sunny conditions on Saturday brings the possibility of ‘Moderate’ ozone across London during the afternnon/evening in locations away from busy roads as emissions drift and react in the strong sunlight. On Sunday there remains the chance of ‘Moderate’ ozone but is less likely since a change in air path and possible thunderstorms are expected in the afternoon. Thunderstorms can, however, be associated with bringing high-level ozone down to ground level so we may see some spikes in ozone associated with this.
From late Sunday onwards slightly cooler, more overcast conditions are expected with air off the Atlantic, and this should limit the generation of ozone.
Winds are expected to be gusty throughout the forecast period and will help disperse local emisssions.
Pollution levels are expected to remain 'Low' for the following pollutants during the forecast period: