North Wales is in the throws of a glorious spell of sunshine .
And with the warm weather expected at least until Sunday , it looks like it'll be a great weekend of weather in the region.
But while the sun will be a welcome change for most people in the region, experts are warning about an unpleasant side effect which could bring misery for some during the sunny spell.
They're called 'pollen bombs' and are brought about by high levels of pollen, thanks in part to the long and hard winter.
The sudden sunnier weather, coming after snow and rain, also plays a part.
Hay fever is expected to affect around 18 million people in Britain.
And charities have warned pollen is a 'top trigger' for asthma attacks - with some proving deadly - an estimated 3.3million could be affected in the UK.
Holly Shaw, nurse advisor at Allergy UK, has said: "The warmer weather can signal the start of allergic symptoms for people with hay fever.
"Pollen avoidance can be challenging due to the many different types of pollens from grasses, trees and weeds being released at different times of the year," she told the Daily Mail .
Sufferers will experience similar symptoms to a cold - such as itchy eyes, runny nose - but they are also under an increased risk of a life-threatening asthma attack.
The Met Office has issued a 'high warning' in its forecast for today, with the pollen levels expected to stay until Saturday.
With higher temperatures, and high pressure, pollen levels will be higher than average.
While it sounds like all bad news, if you suffer from flower pollen you may be ok. The main culprit this week will be tree pollen, which affects one in four British sufferers.
What is a pollen bomb?
The New Scientist says it comes about because plants need a period of cold then warm weather before they flower.
Now the days are getting warmer, the plants that couldn't flower earlier in the spring are more likely to do so all at once.
This is why you hear the term 'condensed spring' as it's much shorter than normal.
Spring has been held back by about two weeks, which is why you will now see more flowers popping up.
What will the pollen count be for the rest of the month?
April's pollen count looks like it will remain high. There's a high tree pollen count, but grass and weed will become higher later on in the year.