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Pollen forecast

We produce and supply the pollen forecasts for the UK in conjunction with the Met Office.

Summary and Weekly Synopsis

Very high pollen risk during warm dry weather. Grass nettle dock and plantain will be the main allergens airborne.

This forecast was last updated on 6th July 2015.

Tree Pollen - Low

Lime trees will start to emit pollen this week with a moderate to high risk for those sensitized to this type when near to the source trees.

Grass Pollen - Very High

A high to very high pollen risk for many UK regions during warm dry weather. Rain will occasionally reduce the risk temporarily.

Fungal Spore - Moderate

The spore risk will be moderate generally. Cladosporium is now in occurring in moderate amounts. Sporobolomyces and tilletiopsis will also be airborne particularly during warm humid nights. The Alternaria levels are just starting to increase but will remain low this week.

For more information on fungal spore allergy click here.

Weed Pollen - High

Nettle pollen will follow a similar pattern to that of the grasses but affecting a much lower proportion of hay fever sufferers. Plantain and dock pollen will also be airborne in low to moderate amounts. Overall weed pollen affects approximately 20% of hay fever sufferers.

Other information

Oilseed rape (Brassica napus) pollen can cause hay fever in a small number of sufferers but Volatile Organic Compounds (VOCs) given off by the crop can cause irritation of the upper respiratory tract and eyes in some people in close proximity to the crop.

For more information on the role of fungal spores in allergy, click here.

For more information on the role of pollen in allergy please see the following pages:

Further Information

Further information on this service can be obtained from Beverley Adams-Groom on 01905 855411.

Forecasts are available on a regional basis to cover the whole of the UK including Northern Ireland. They can also be provided in detail for individual regions.

Daily forecasts are issued from the middle of March to the end of September. Tree pollen forecasts are issued in late spring (late March to Mid May). Grass pollen forecasts are issued from late May to August. Weed pollen forecasts are issued from July to the end of May. Fungal spore forecasts are also available on a daily basis from September to the end of November.

Daily forecasts are featured in newspapers, on radio, on television and various web pages.

All the forecasts are based on information from the quality controlled data produced by the National Pollen Monitoring Network, combined with the information from weather forecasts, local vegetation and typography types and information about biological factors and the weather in the preseason period that influences the amount of pollen produced.