Mayo was left high and dry on this day in 1999 (10 November), when a new weather record for November in Ireland was set. Knock Airport reported the month’s highest ever Mean Sea Level Pressure (hPa) (1046.0 hPa).

The high-pressure system brought dry and settled conditions across the country. In ear flat calm conditions, Knock Airport measured a maximum gust of just 3.5 km/h and a mean wind speed of 0.2 km/h. Temperatures remained close to seasonal norms, peaking between 9 and 12 degrees Celsius nationwide.

The year 1999 proved to be remarkable for Irish weather records. In March, Beenreagh Mountain in Kerry received 650.0 mm of rainfall, the highest monthly total ever recorded in the country. Just weeks later, Cloone Lake, also in Kerry, logged 105.6 mm of rain in a single hour on 20 April, setting a new national record for hourly rainfall.

Ireland’s all-time highest mean sea level pressure was recorded more recently at Malin Head in Donegal. On 20 March 2020, the station measured 1051.2 hPa, surpassing the 1999 November record and setting a new benchmark for atmospheric pressure in the country.