Forecast

Today

Forecast icon

Issued By:
Environmental Research Group
King's College London

Issued On: 22/04/2019 08:27:00

Pollution Band: Moderate

Details

Tuesday will stay dry with temperatures generally remaining warm for the time of year but cooler than that experienced over the Easter weekend

The continuing air path is expected to import particulate pollution from the Continent. This will combine with local emissions. It's possible that 'Moderate' levels of PM10 and PM2.5 particulate will be reached at some locations.

A key uncertainty in the forecast is the possible arrival of Sarharn dust at the end of the day.

The long sunny periods, high temperatures and East winds may bring additional ozone precursors allowing for photo-chemical generation of ozone to take place. Therefore 'Moderate' Ozone will likely be reached at some locations.

Air pollution should remain 'Low' through the forecast period for the following pollutants:

Nitrogen Dioxide
Sulphur Dioxide


This forecast is intended to provide information on expected pollution levels in areas of significant public exposure. It may not apply in very specific locations close to unusually strong or short-lived local sources of pollution.

Outlook

Forecast icon

Issued By:
Environmental Research Group
King's College London

Issued On: 23/04/2019 11:46:57

Pollution Band: Moderate

Details

Wednesday will mark the end of the current air pollution episode with a transition to cloudier and showery weather.

The mainly southerly air path is expected to import particulate pollution from the continent. A key uncertainty in the forecast is the possible arrival of Saharan dust during the day, which may bring up to 10ugm-3 of particulates. It is possible that 'moderate' levels of PM10 and PM2.5 particulate will be reached at some locations.

'Moderate' ozone is also possible but is thought unlikely.

Air pollution should remain 'Low' through the forecast period for the following pollutants:

Nitrogen Dioxide
Sulphur Dioxide


This forecast is intended to provide information on expected pollution levels in areas of significant public exposure. It may not apply in very specific locations close to unusually strong or short-lived local sources of pollution.

How to use the Daily Air Quality Index *

  • Step 1: Determine whether you (or your children) are likely to be at-risk from air pollution. Your doctor may also be able to give you advice.
  • Step 2: If you may be at-risk, and are planning strenuous activity outdoors, check the air pollution forecast.
  • Step 3: Use the health messages corresponding to the highest forecast level of pollution as a guide.
Air Pollution Banding Value Accompanying health messages for at-risk groups and
the general population
At-risk individuals ** General population
Low 1-3 Enjoy your usual outdoor activities.

Enjoy your usual outdoor activities.

Moderate 4-6 Adults and children with lung problems, and adults with heart problems, who experience symptoms, should consider reducing strenuous physical activity, particularly outdoors. Enjoy your usual outdoor activities.
High 7-9 Adults and children with lung problems, and adults with heart problems, should reduce strenuous physical exertion, particularly outdoors, and particularly if they experience symptoms. People with asthma may find they need to use their reliever inhaler more often. Older people should also reduce physical exertion. Anyone experiencing discomfort such as sore eyes, cough or sore throat should consider reducing activity, particularly outdoors.
Very High 10 Adults and children with lung problems, adults with heart problems, and older people, should avoid strenuous physical activity. People with asthma may find they need to use their reliever inhaler more often. Reduce physical exertion, particularly outdoors, especially if you experience symptoms such as cough or sore throat.

* Daily Air Quality Index information sourced from UK-AIR (Air Information Resource) website.

* Adults and children with heart or lung problems are at greater risk of symptoms. Follow your doctor's usual advice about exercising and managing your condition. It is possible that very sensitive individuals may experience health effects even on Low air pollution days.

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