Ireland

Met Eireann says Ireland had first ‘tropical night’ in 20 years during heatwave

The Irish heatwave of 2021 will be remembered for years to come, and it’s not over yet.

Met Eireann has extended a Status Yellow high temperature warning until Saturday morning as the sun continues to sizzle.

From now until 9am on Saturday, the roasting temperatures will continue, with hot conditions by day and staying very warm and humid at night.

Daytime maximum temperatures will generally be 27 to 30C with overnight values not falling below 15 to 19C.

The national forecaster says things will really heat up in the six counties under an orange warning, which is still in place until 9am on Friday – Cavan, Monaghan, south Leitrim, Roscommon, Longford, Westmeath.

Maximum temperatures will exceed 30C in some areas in these counties and overnight temperatures will drop no lower than around 20C.



met eireann
Average nighttime temperatures this week have been hitting the high teens.

The high nighttime temperatures have made getting a good night’s sleep no mean feat in recent days, with last night one of the hottest on record.

According to Met Eireann, the early hours of Thursday morning were considered a “tropical night”, meaning temperatures did not drop below 20C.

Meteorologist Bonnie Diamond explained whether similar rare nighttime conditions will hit the country in the coming days.

“Last night, we saw the first tropical night in Ireland for 20 years,” she told the Irish Mirror.

“Tropical nights are when temperatures overnight don’t fall below 20C.

“It was actually in Valentia Observatory in Co Kerry, temperatures fell no lower than 20.5C overnight and to put things in context, we’re lucky if we get that on a July day in Ireland, never mind overnight so it’s definitely exceptional.

“I think tropical nights have only occurred six times now since digital records began in Ireland.”

Temperatures will hit “the high teens” again tonight, but are not expected to reach ‘tropical levels’, Ms Diamond added.

“It’s less likely tonight, but it could come close, we’re more likely to see temperatures into the high teens,” she said.

“But by the weekend, with not seeing the very high temperatures by day, we’re not seeing temperatures as warm into the weekend [overnight], maybe in the mid-teens in places, and that will make sleeping easier.”

Yesterday was the hottest day of the year in Ireland so far when the mercury hit 30.8C at Mount Dillon in Co Roscommon.

It will stay hot for the rest of today and tomorrow, with some areas inland potentially experiencing temperatures of 30C.

However, there could also be some thundershowers breaking out in some areas because of the high temperatures.



People enjoying the weather in Sandymount
People enjoying the weather in Sandymount

“We’re seeing temperatures quite widely across the country still today and tomorrow, into the high 20s,” Ms Diamond said.

“It’s not until the weekend we see the very high temperatures falling away so by Saturday and Sunday, we’re in the low to mid-20s which is still warm for people.

“The main change for the weekend is we’re losing the very high temperatures and it’s not going to be quite as warm overnight either by the weekend.”

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