Forecast Issued – June 20th 2017
TUESDAY JUNE 20TH: A fine day with plenty of hazy sunshine. A little fresher in the morning than previous days, however humidity will increase during the day as the fresher air over the east of Ireland gets pushed back northeastwards once again. Temperatures rising from the mid-high teens in the morning to between 23c and 26c in the early evening. As the humidity increases, there is a small chance of a thunderstorm in the late evening and early night. Winds light to moderate east at first, backing southeast then as the day progresses. Tonight will hold mostly dry – any showers dying out. Mild and humid with lows of between 14c and 17c – so feeling quite muggy. Breezes will be near calm, variable in direction but settling into a southerly before daybreak.
WEDNESDAY JUNE 21ST: HEAT WARNING: Wednesday will be the warmest day of the year so far – feeling hot as both the humidities and temperatures will be high – A fine start to the day with prolonged hazy sunshine in light southerly breezes. Warm from the start with temperatures around 20c shortly after sunrise (5am) and quickly rising to between 27c and 30c during the afternoon. Humidity will be very high, so it will feel oppressive in the strong direct sunlight. Into the late afternoon and evening cloud will be bubbling up from the west and thunderstorms will break out. These may be locally severe with intense downpours and the potential for hail and frequent lightning, however some places will escape also. Mild and humid for a time overnight with an increased risk of thundery rain as a cold front pushes east. Lows eventually falling to 13c or 14c around dawn and breezes will back southwesterly.
THURSDAY JUNE 22ND: Cloudy at first as the cold front clears east. Feeling much fresher as westerly breezes pick up and the cloud breaks to give a day of sunny spells and some light showers. Highs reaching 19c or 20c. Becoming cloudy in the late evening ahead of a band of rain that will push east overnight. Lows of 11c or 12c in moderate south westerly breezes.
FRIDAY JUNE 23RD: Early morning cloud and rain quickly clearing to leave a cooler fresh day in light to moderate west winds. Highs of just 18c or 19c at best.
THE WEEKEND: Not much change for Saturday – some sunny spells and the risk of a few light showers in moderate westerly breezes. Highs reaching the high teens again. However, there is uncertainty beyond this as some models are showing Sunday to be a cloudy damp day with rain pushing north. Confidence is low – so please check back for updates later in the week.
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